Words of Advice: The OEM Systems Designer

In a recent survey, we asked the following question: What advice would you give an OEM systems designer? Here are a few of the answers, edited slightly for clarity.

Communication, Part 5: Internet Impedance Calculators for Modeling

Bob Chandler of CA Design and Mark Thompson of Prototron Circuits address how new engineers use internet impedance calculators for modeling (e.g., formulas versus recipes) in Part 5 of this series. Do you use impedance calculators that you found on the internet? Read on!

Design For Excellence: Karen McConnell on Standards

During the IPC Summer Meetings, I spoke with Karen McConnell, senior staff CAD CAM engineer with Northrop Grumman Mission Systems. Karen is a veteran PCB designer as well as an IPC committee chair and mentor. She offered an update on some of the IPC committees she chairs, the need for more mentor programs in this industry, and why you can call something a ham sandwich if you define it correctly in the standard.

IPC-2581 Continues to Flourish

Because standards adoption in this industry tends to be akin to turning around a battleship, what is often seen as new has generally already been in production for 10 years or more. Often, there are outside influences and dependencies that cause this, so most of us tend to take a “wait-and-see” approach—let others shake out the issues. And even then, we only look at adoption if the mandate comes from higher-ups in the organization. It works the way we do it now, so why change?

Words of Advice: What Feature Would You Like to See in Your CAD Tool?

In a recent survey, we asked the following question: What feature would you like to see in your CAD tool? Here are a few of the answers, edited slightly for clarity.

Words of Advice: Making Life Easier for Fabrication and Assembly

In a recent survey, we asked the following question: What steps do you take to make the job easier for your fabrication and assembly providers? Here are a few of the answers, edited slightly for clarity.

Happy Holden Previews His AltiumLive Frankfurt Keynote

I recently sat down for an interview with Happy Holden, who is slated to give a keynote speech at this year’s AltiumLive event in Frankfurt, Germany. Happy gives a preview of his presentation, which is focused on smart factories and automation, and why artificial intelligence might improve PCB design and fabrication in the future.

Words of Advice: Starting a New Design

In a recent survey, we asked the following question: What do you think is the most important thing a designer should remember when planning a new PCB design? Here are a few of the answers, edited slightly for clarity.

Bob Martin Brings Maker Attitude to AltiumLive Keynote

Bob Martin is a self-proclaimed “Wizard of Make” and senior staff engineer with Microchip Technology. Next week, this leader of the maker community will be one of the keynote speakers at AltiumLive in San Diego, California. I caught up with Bob and asked him to give us a preview of his presentation.

Insertion Loss Performance Differences Due to Plated Finish and Circuit Structure

Data will be presented for loss versus frequency for six different plated finishes commonly used in the PCB industry, and opinions will be offered as to why the loss behavior differs for the different plated finishes and for the different circuit configurations. Because the insertion loss of high-frequency circuits also depends on substrate thickness, circuits fabricated on substrates with different thicknesses will be evaluated to analyze the effects of substrate thickness on insertion loss.

John Michael Pierobon Discusses His Flex Design Class

If you’re new to flex design, you might want to check out an online course offered by All Flex, a flex fabricator. The course, Designing Flexible Circuits, was created by John Michael Pierobon. I asked John Michael to discuss his flexible circuit design course, and whether online curriculum can ever replace good old-fashioned live instruction.

Words of Advice: First Steps in the Design Process

In a recent survey, we asked the following question: What are the first steps you take in the PCB design process? Here are some of the answers, edited slightly for clarity.

Leo Lambert on Training the Next Generation of Technologists

I sat down for an interview with Leo Lambert, VP of technical director for EPTAC Corporation, during the IPC Summer Meetings in Raleigh, North Carolina. We discussed the company’s growth, including plans to have training centers across different regions of the country to help cut down on students’ travel times, and why training methods must constantly evolve to remain effective.

Design Rule Checks Cut Down Board Respins

PCB designs commonly undergo multiple respins as a result of inconspicuous signal integrity (SI), power integrity (PI), and electromagnetic interference (EMI) violations. At an average cost of nearly $28,000 per respin, ensuring that a given design meets its performance, time to market, and cost goals is imperative. To help eliminate complicated and difficult-to-diagnose layout violations, some PCB tool suites offer unique electrical design rule checks (DRC).

Words of Advice: What are Your Biggest Design Challenges?

In a recent survey, we asked the following question: What are your biggest design challenges? Here are just a few of the answers, edited slightly for clarity.

Joe Grand Brings a Hacker Outlook to PCB Design

From designing his own mischievous gadgets to testifying on Capitol Hill and starring in his own Discovery TV show “Prototype This!” Joe Grand has lived a hacker’s life. I spoke with Joe about his upcoming keynote at AltiumLive in San Diego, “When Hacking and Engineering Collide,” which will focus on the lighter side of engineering and the benefits of thinking like a hacker. Can Joe convince PCB designers to adopt a hacker’s outlook?

Words of Advice: What Feature Would You Like to See in Your CAD Tool?

In a recent survey, we asked the following question: What feature would you like to see in your CAD tool? Here are a few of the answers, edited slightly for clarity.

Robert Feranec: A Lifetime of PCB Design

I recently spoke with Robert Feranec about the upcoming keynote he’ll be giving at AltiumLive in San Diego, California. Robert is a YouTube star and founder of the FEDEVEL Academy. In our interview, he discusses his keynote presentation as well as how he’s helping designers and engineers around the world understand and optimize their PCB design processes.

Pulsonix Is Bullish on Next-gen Designers

During a recent trip to the U.K., Barry Matties spoke with Bob Williams, the managing director of Pulsonix, about training the new generation of designers. He explained how the company reaches out to local high schools, colleges, universities, and user groups to advocate for careers in PCB design and manufacturing.

Words of Advice: Flex Design Problems

In a recent survey, we asked the following question: What are your biggest problems related to flex design? Here are just a few of the answers, edited slightly for clarity. Not designing "enough flex to get good at it" is a fairly common refrain.

PCB Design Training: More Critical Than Ever

I interviewed Gary Ferrari of FTG at the IPC High-Reliability Forum and Microvia Summit in Baltimore. Gary is a co-founder of the IPC Designers Council and a longtime advocate for PCB design and PCB designers. We discussed the crucial role that PCB designers play in the entire electronics development process, and how IPC and the Designers Council are helping to educate and inform the next generation of designers.

AltiumLive Q&A With Keynote Speaker Eric Bogatin

It's show season again! The 2019 AltiumLive PCB Design Summit will be here before you know it, taking place October 9-11 in San Diego, California. Teledyne LeCroy’s Eric Bogatin, the “signal integrity evangelist,” will be giving a keynote presentation titled “Breaking Bad: A Downside of Open Source Designs.” Eric gives us a preview of his presentation and discuss some of the biggest design challenges he sees today.

Decoupling Capacitors’ Impact on Power and Signal Integrity

It is crucial for hardware designers to identify the resonant frequency of each element of the PDN on a PCB and its impact on power integrity. A PCB with poor power integrity—such as a higher-than-targeted PDN impedance across the wideband range—results in SSN and a shrunken eye diagram of the signal transmitted by the IC that draws power from the PDN. This article demonstrates the post-layout co-simulation of power and signal integrity.

Words of Advice: Obstacles to Solid Data Hand-off

In a recent survey, we asked the following question: What are the biggest obstacles you face in getting your design to the fabricator? Here are a few of the answers, edited slightly for clarity.

Words of Advice: Your Company’s Design Process

In a recent survey, we asked PCB designers to describe their company’s design process: Is it a rigid workflow they follow to the letter, or a process that allows for their individual techniques? Of course, the comments were illustrative.

Focusing on Surface Sensitivity for Reliability

At the recent IPC High-Reliability Forum and Microvia Summit, Customer Applications Scientist Elizabeth Kidd and Sales Engineer Alex Bien, both of BTG Labs, discuss with Andy Shaughnessy their presentation on the challenges of working with highly sensitive surfaces, such as the risk of contamination. They also talked about the various surface characterization techniques that BTG Labs uses to identify such contaminants.

Interconnect Reliability Correlation With System Design and Transportation Stress

Interconnect reliability is very critical to ensure product performance at predefined shipping conditions and user environments. Plating thickness of the compliant pin and the damping mechanism of electronic system design are key success factors for this purpose. This paper discusses design variables—such as pin hard gold plating thickness, motherboard locking mechanism, and damping structure design—to ensure interconnect reliability.

Development of Flexible Hybrid Electronics

This article will present a hybrid manufacturing process to manufacture FHE systems with a two-layer interconnect structure utilizing screen printing of silver conductive ink, filled microvias to connect ink traces at the different layers, and use of the traditional reflow process to attach the semiconductor chips to the printed substrates.

The Impact of Inductance on Impedance of Decoupling Capacitors

This article discusses the impact of interconnection inductance on the impedance of the decoupling capacitor, which influences the power integrity of the PCB. The investigation is performed with 3DEM simulation by varying the trace length and height of stitching vias that connect the decoupling capacitor across the power rail and ground.

IPC High-reliability Forum and Microvia Summit Review, Part II

The Microvia Summit on May 16 was a special feature of the 2019 event in Baltimore, since microvia challenges and reliability issues have become of great concern to the PCB manufacturing industry. It provided updates on the work of members of the IPC V-TSL-MVIA Weak Interface Microvia Failures Technology Solutions Subcommittee and opportunities to learn about latest developments in methods to reveal and explain the presence of latent defects, identify causes and cures, and be able to consistently and confidently supply reliable products.

Mentor Tools: Optimized for Flex and Rigid-flex Design

With the launch of the new Flex007 section in Design007 Magazine, we asked David Wiens, product marketing manager with Mentor, a Siemens Business, to tell us about their tools’ flex and rigid-flex design capabilities. As David explains, today’s higher-end design software tools are optimized for flex design, making workarounds a thing of the past.

IPC High-reliability Forum and Microvia Summit Review, Part I

The IPC High-Reliability Forum and Microvia Summit covered a broad range of topics related to reliability and provided interactive opportunities to share expert knowledge and experience in determining and understanding the causes of failure and selecting the best design rules, materials, processes, and test methods to maximise product reliability.

Words of Advice: Where Do You Get Involved in the Design Process?

In a recent survey, we asked the following question: Where in the process do you typically get involved with a design project? Here are a few of the answers, edited slightly for clarity.

Words of Advice: What are Your Biggest Problems Related to Flex Design?

In a recent survey, we asked the following question: What are your biggest problems related to flex design? Here are a few of the answers, edited slightly for clarity.

Words of Advice: What Feature Would You Like to See in Your CAD Tool?

In a recent survey, we asked the following question: What feature would you like to see in your CAD tool? Here are a few of the answers, edited slightly for clarity.

Pulsonix 10.5 Development Driven by Customer Demand

I recently spoke with Bob Williams, the managing director of Pulsonix, about the release of the EDA tool’s version 10.5. Bob explained how the company had made the tool more intuitive based on user input, and he discussed some of the more cutting-edge functionality not normally found in competitively priced tools.

Words of Advice: Where Do You Get Involved in the Design Process?

In a recent survey, we asked the following question: Where in the process do you typically get involved with a design project? Here are a few of the answers, edited slightly for clarity.

Design for the Unknown

Our industry loves DFx, also known as the “Design Fors.” As PCB designers, we not only design for manufacturability (DFM) but we design for assembly, reliability, cost, test, and many more factors which we like to lump together as DFx. But now, I think it’s time we embrace a new DFx: Design for the Unknown, or DFU.

Words of Advice: Will 5G Affect Electronics Manufacturing?

In a recent survey, we asked the following question: How do you think 5G will affect the electronics manufacturing industry? Here are a few of the answers, edited slightly for clarity.

Design Rules Recipe: Solvability, Manufacturability, and Performance

One thing that we’ve noticed lately: Each designer seems to have his or her own way of using PCB design rules. There doesn’t seem to be much agreement about setting or using design rules. So, in this true experts panel, Mike Creeden of San Diego PCB joined Freedom CAD’s Scott McCurdy, Jay Carbone, and Rich Kluever to share their views on PCB design rules.

Wild River, eSilicon, and Samtec Team up for 112-Gbps Test Vehicle

During DesignCon, I sat down for an interview with Tim Horel from eSilicon, Al Neves of Wild River Technology, and Matt Burns from Samtec. They’ve recently teamed up to create a 112-Gbps test vehicle that may be the first of its kind of test fixture.

Mentor’s EDA Perspective on Managing Design Rules

I recently spoke with Dave Wiens, product manager, and Mike Santarini, EDA content director of corporate marketing, both of Mentor, a Siemens business, about design rules and constraints, and what their customers want regarding design rules. They explained how EDA companies like Mentor help designers constrain for performance while avoiding over-constraining and increasing the cost of the board and also being manufacturing-aware.

Altium’s Craig Arcuri on Design Rules: Past, Present, and Future

We recently spoke with Altium’s Craig Arcuri about his views on design and manufacturing rules. Craig has experience running both design and manufacturing companies, so he has a fairly circumspect view of constraints from both sides of the product realization process. Craig details some of the challenges with setting and managing hundreds of often divergent design and manufacturing rules, and how both design and manufacturing constraints need to evolve.

XNC Format: Gerber Takes Data Into the Future

The problem is that so many NC files are of deplorable quality because the NC format was never designed as a data transfer format. It has always been a machine driver and contains all sorts of information that a drilling machine needs, but that is irrelevant and confusing for data exchange.

Technically Appropriate Material Choices are Key to Design Success

Materials are no longer a passive part of the design; they play an active role in the manufacturability, reliability, and speed of a PCB. I-Connect007’s Nolan Johnson and Mike Creeden, founder of San Diego PCB Design, discuss several key characteristics that designers should consider in their material selection process.

Words of Advice: Your Company’s Design Process

In a recent survey, we asked PCB designers to describe their company’s design process: Is it a rigid workflow they follow to the letter, or a process that allows for their individual techniques? Of course, the comments were illustrative. Only one respondent said, "We just wing it."

Automation and the Smart Factory: Introduction to Industry 4.0

There’s a lot of talk about automation, but I find that there is very little available on automation planning. This is one of my specialties. I started by studying for an MSEE in control theory, which went well with my bachelor’s degree in chemical engineering because I specialized in process control and IC manufacturing.

XPLM: Using PLM to Integrate ECAD and MCAD Data

During AltiumLive in Munich, I met with Robert Huxel, XPLM’s director of business development for EMEA and APAC. XPLM offers data integration for some of the big EDA tool companies, and their tools can integrate ECAD and MCAD data into PLM systems. I asked Robert to tell us about the requirements of today’s PLM tools, the changing world of ECAD and MCAD integration, and whether these two types of data are ever going to converge.

EM Modeling: The Impact of Copper Ground Pour on Loss and Impedance

This article briefly introduces the general purposes of copper ground pour on printed circuit boards. Subsequently, the impact of copper ground pour on PCB channel loss in terms of insertion loss and impedance in terms of time domain reflectometry (TDR) is studied with electromagnetic modeling using Mentor HyperLynx.

Youth in the Industry Putting Training to Work

At a job fair on campus at George Fox University, Nolan Johnson sat down with Jake Whipple, a computer engineering senior, to discuss the GFU engineering program. This is one of the few engineering programs in the U.S. that gives students experience designing PCBs before they enter the work force.

Preparing to Enter the Workforce With PCB Design Experience

Nolan Johnson recently spoke with Alex Burt, a computer engineering student at George Fox University, at a well-attended college career fair on the GFU campus in Newberg, Oregon. In the interview, Alex discusses his PCB classwork, challenges of design, and how it has impacted his internship experience as he prepares to enter the workforce upon graduation in the spring semester of 2019.

Words of Advice: Flex Design Challenges

In a recent survey, we asked the following question: What are your biggest problems related to flex design? Here are just a few of the answers, edited slightly for clarity.

PCB Design Is All in the Family With Nicole Pacino

I shared a flight with Nicole Pacino on the way to Altium Live in Munich, and she mentioned that her father was speaking at the show. I went down the list of speakers, and it turned out that her dad is Mike Creeden of San Diego PCB. In Germany, I asked Nicole to tell us about how she got into this industry, and what we could do to draw more young people into this career.

Nano Dimension Offers Update on Dragonfly 3D Printer a Year After Launch

The Nano Dimension Dragonfly 3D printer arrived in much fanfare a little over a year ago. The company has been selling them to customers around the world, many of whom are using them to print antennas, sensors, and PCBs. At AltiumLive in Munich, I asked Product Manager Robert Even to discuss what they’ve learned in the year since the Dragonfly debuted, and some potential uses for 3D printing technology.

Bert Simonovich on Modeling Copper Roughness

I met with one of our contributors, Bert Simonovich of Lamsim Enterprises, at DesignCon 2019. Bert’s paper on interconnect modeling was nominated as a Best Paper finalist, so I asked him to discuss his paper and some of the challenges that engineers and their customers are facing right now.

EMA: Cadence Moves Simulation Further Up in the Design Cycle

Cadence Design Systems recently integrated more of its Sigrity capabilities into the front end of its PCB design tools. During DesignCon, Chris Banton of EMA Design Automation spoke with me about how this drive for “model-less analysis” benefits the PCB designer who can now access signal and power integrity, DFM, and electrical rule checking functionality early in the design process and have fewer issues later.

Words of Advice: What are Your Biggest Design Challenges?

In a recent survey, we asked the following question: What are your biggest design challenges? Here are just a few of the answers, edited slightly for clarity.

Cherie Litson on ECAD/MCAD and Training the Next Generation

Cherie Litson, CID+, was one of the instructors at AltiumLive Munich. I asked her to discuss some of the topics she covered in her class, and what the future of PCB design will look like. How are we going to pass down all of this design knowledge to the next generation?

Todd Westerhoff Discusses His New Position and Much More

At DesignCon, I met with our old friend Todd Westerhoff, a veteran signal integrity engineer. Todd joined Mentor, a Siemens Business, since we last spoke. We discussed his new job responsibilities, his drive to get more designers and engineers to use SI tools, and the increasing value of cost-reduced design techniques versus overdesigning PCBs.

RTW IPC APEX EXPO: Rogers' Anthony Mattingly Discusses the Advanced Laminate Market

Rogers Corporation's Senior Product Manager Anthony Mattingly and Editor Pete Starkey discuss the ever-evolving market for advanced laminates for technologies such as 5G. Mattingly explains how Rogers has invested heavily in infrastructure for adding about 40% more capacity in the next few years.

Joe Clark Discusses DownStream’s Updated Tool Lineup and IPC-2581

DownStream Technologies recently revamped their entire product line, from CAM350 through BluePrint-PCB. DownStream co-founder Joseph Clark and Guest Editor Kelly Dack discuss some of these updates, including a new GUI and capabilities such as 3D analysis, as well as news about IPC-2581.

CES 2019: More Show Floor Favorites

In my final piece covering CES 2019, I will review more automotive technology, updates on 3D printing, and some trending devices such as smartwatches and new computer components for those that either need or just want to have extremely powerful and impressive-looking computers.

Words of Advice: Flex Design Problems

In a recent survey, we asked the following question: What are your biggest problems related to flex design? Here are just a few of the answers, edited slightly for clarity. How many of you would agree that "educating the customer" is your biggest challenge?

AltiumLive Munich: Day 2 Keynotes

Having enjoyed the conference dinner and robot battles of the previous evening, a good night’s sleep, and a hearty breakfast, Altium’s family of over 220 electronics engineers and designers eagerly returned to the conference room. Many jostled to secure the best seats for the second day of the European AltiumLive design summit in Munich, keen to make the most of the “learn, connect, and get inspired” opportunity it offered.

AltiumLive Munich: Day 1 Keynotes

The weather forecast was wrong! Despite my apprehension and winter clothes, there was very little snow at the Hilton Munich Airport. It could have been any season of the year inside the splendid convention facility, which was also the venue for the second European AltiumLive design summit. AltiumLive brought together a family of over 220 electronics engineers and designers eager to learn from top industry experts and applications specialists who were equally eager to share their knowledge and experience freely.

Words of Advice: Advice for Systems Designers

In a recent Design007 survey, we asked the following question: What advice would you give an OEM system designer? Here are just a few of the replies, slightly edited for clarity.

AltiumLive Munich Draws Designers from Around Europe

I’m finally unpacked after last week’s AltiumLive PCB design summit in Munich. Much like the AltiumLive event I attended in San Diego last October, the conference drew hundreds of PCB designers. This marked the second AltiumLive PCB design summit held in Munich, and Altium seems to have it down to a science. I spoke with designers from Germany, Austria, the Netherlands, and Belgium, just to name a few countries. Many of them were involved in the automotive segment but some were in medical and industrial controls as well. It’s great to be at an event that is full of PCB designers, because designers are few and far between at most PCB industry events.

The Quest for Perfect Design Data Packages

There’s an ongoing problem in the PCB industry: fabrication shops are receiving incomplete or inadequate design data packages, leaving manufacturers scrambling to fill in the blanks. For a quick-turn prototype shop like Washington-based Prototron, with over 5,000 customers and up to 60% of orders coming from new customers each month, that can add up to a lot of wasted time and effort just in the quoting stage. Dave Ryder, Prototron president, and Mark Thompson, engineering support, delve into this continuing issue and more.

Altium Prepares for Munich Show as Growth Continues

It’s been just two months since the AltiumLive event drew several hundred designers to San Diego, California, and Altium is already gearing up for the next show in Munich, Germany (January 15–17, 2019). I recently spoke with Chris Donato, VP of global sales for Altium, about the upcoming AltiumLive show as well as the company’s growth over the past few years.

A Fractal Conversation with Jim Howard and Greg Lucas

Veteran PCB technologists Jim Howard and Greg Lucas have made an interesting discovery: Certain shapes of copper planes make a PCB run more efficiently than other shapes, a process they dubbed fractal design. It doesn’t appear to cost a penny more, and testing suggests that fractal design techniques could eliminate edge noise. Barry Matties and Andy Shaughnessy asked Jim and Greg to discuss the fractal design process, and the advantages of using this technique.

Words of Advice: Streamlining Your Design Process

In a recent Design007 Survey, we asked the following question: What would help you streamline your design process? Here are just a few of the answers, edited slightly for clarity.

Rainer Beerhalter Discusses His AltiumLive Munich Presentation

Rainer Beerhalter is a physicist, and according to his design bureau’s website, “founder, owner, and mastermind” of B GMBH. Rainer attended the first AltiumLive in Munich in 2017, and he’s returning to this year’s event in Munich January 15–17. I asked him to tell us about the class he’ll be teaching in Munich, and why he decided to come back for the sophomore AltiumLive show.

Birds of a Feather: PCB Carolina and the RTP Designers Council

At PCB Carolina 2018, I met with show founders Tony Cosentino, Randy Faucette, and Lance Olive, who are all employees at the Better Boards service bureau in nearby Cary. I asked the trio to discuss the show’s history, its relationship to the Research Triangle Park (RTP) North Carolina Chapter of the IPC Designers Council, as well as the show’s tremendous growth over the past few years.

Dan Beeker on His AltiumLive Munich Keynote and Battle With the Status Quo

Dan Beeker, senior principal engineer with NXP Semiconductors, was one of the speakers at the first AltiumLive event in San Diego in 2017. Now, he returns to AltiumLive 2019 in Munich from January 15–17 with a keynote titled, “It’s All About the Space.” Here, he discusses his keynote, which focuses on the need for designers to understand the behavior of electromagnetic fields, and why the status quo for advanced PCB design must change from, “We are going to fail,” to, “We are going to pass.”

Susy Webb: The History and Future of the Designers Council

When we started planning this issue on the IPC Designers Council, I knew I’d have to speak with design instructor Susy Webb, a longtime DC member and currently an executive board officer. I asked Susy to discuss how she first got involved with the DC, why designers should join their local chapter, and what the future holds for this group.

Effects of PCB Fiber Weave on High-Speed Signal Integrity

This article studies the effect of PCB fiber weave on signal integrity in terms of mode conversion and differential channel loss due to intra-pair skew. The study used Keysight ADS 2DEM simulation to observe s-parameter (i.e., insertion loss and differential to common-mode conversion) and an eye diagram for signal transmission at 1 Gbps and 10 Gbps.

Dock Brown on Succeeding at Failure Analysis

Dock Brown of DfR Solutions gave a keynote speech at SMTAI, “Requirements for Both Cleaning and Coating to Building Medical Hardware.” Barry Matties and Happy Holden sat down with Dock to discuss the current trends he sees in failure analysis, the concept of “rules versus tools,” and how predictive engineering software used early in the design cycle can help predict failures in components and microvias and drive cost down.

The Readers Speak: The Design Data Format Survey

If you’re or designer or a design engineer, the odds are good that you have a few things to say regarding design data formats. We want to hear from you! Your participation in this design data survey would be much appreciated. We know that your time is valuable, and you’re getting ready for the holidays, so we’ve kept it short and sweet.

Martin Cotton’s Parting Shot

Martin Cotton is a unique personality in the PCB industry. As Cotton says, “I’m a designer—look at my haircut!” Cotton gave the keynote at the Institute of Circuit Technology’s 2018 Harrogate Seminar, challenging his audience to consider laminate dielectric properties in the context of power and cost in a presentation entitled 'The Effect of the Dk of a PCB Laminate on the Cost-effectiveness of Office Rental Space. Intrigued?' Read on!

Mentor Discusses New DFT, DFM, and Design Verification Tools

At electronica 2018, John McMillan, digital marketing program manager-Electronic Board Systems, and Mark Laing, business development manager-Valor Division of Mentor, a Siemens business, discuss new tools for PCB design verification, as well as design for manufacturing (DFM) and design for testing (DFT).

Rick Almeida Discusses DownStream's Latest News

At the 2018 electronica exhibition in Munich, Rick Almeida, founder of DownStream Technologies, brings Editor Pete Starkey up to speed with the company’s latest news.

Martyn Gaudion on Signal Integrity Modelling and Stackup Tools

The accuracy of signal integrity modelling continues to improve, and stackup tools are becoming widely used, which now include material suppliers' datasheet information. During the recent electronica show in Munich, Germany, Martyn Gaudion, managing director at Polar Instruments, explained how Polar often serves as a bridge between PCB design and fabrication, and why educating his customers is so critical.

New Designers Council Column: The Digital Layout

The IPC Designers Council is launching a new column in Design007 Magazine: “The Digital Layout.” I recently asked two IPC Designers Council (DC) Executive Board members, Mike Creeden and Stephen Chavez, to discuss the content and objective of their new column, and how this all ties in with the DC.

Design Data: File Naming Conventions

Working for an EMS provider, I am often asked to make sense of customers’ PCB design data packages that must be audited for completeness and manufacturability. Quite often, EMS operations receive data to produce a PCB design and begin the auditing process, only to be called off due to customer changes. Sometimes the data is incomplete, or it is missing one or more of the data files required to fabricate the PCB at the supplier. There are also occasions where a customer has sent files that were supposed to be the updated version but were not changed at all.

Impact of Serpentine Routing on Multi-gigabit Signal Transmission

Serpentine is a technique to minimize skew or misalignment of differential pairs. The number of segments and intra-pair spacing of serpentining impacts the high-speed signal transmission. As the intra-pair gap is enlarged for serpentining, the characteristic impedance of the PCB trace in differential mode will rise. This leads to impedance discontinuity, signal reflection, and ultimately, attenuation. The signal attenuation is heavily dependent on the number of segments and intra-pair spacing of the serpentine.

At GreenSource, Lean and Green Starts on the Front End

GreenSource is the first new captive shop in American in decades, and one of the first waste-free board shops as well. The CAM engineers all work remotely, and they can launch a job without ever entering the facility. I spoke with JanNell Taylor and Andy Schilloff, who work at the CAM office in New York. We discussed what it’s like working for a company that plays by its own rules, and what they're doing to get ready for the day GreenSource goes commercial

Achieving Minimal Crosstalk in Multi-board Interconnect

In an electronic system, the signal transmission exists in a closed-loop form. The forward current propagates from transmitter to receiver through the signal trace. On the other hand, for a single PCB, the return current travels backward from receiver to transmitter through the ground plane closest to the signal trace. Meanwhile, for multi-board interconnect (e.g., connectivity through flex or ribbon cable), the return current travels back to the transmitter through the ground or return wire, preferably as close as possible to the signal wire. The path of forward current and return current forms a loop inductance.

Max Seeley’s PCB Design Career is No Fish Story

Max Seeley, senior electrical, PCB, and manufacturing engineer with 3M, was an instructor at the first AltiumLive event in 2017, and he made a return visit to this year’s event in San Diego. I asked Max why he decided to come back to AltiumLive this year and to share the story of his rather circuitous journey into PCB design, which included a turn as a custom aquarium builder. Everyone in PCB design has a different backstory.

Amway Sells Beauty Products—and Designs its Own PCBs

During AltiumLive in San Diego, I met Dugan M. Karnazes, an associate electrical engineer and PCB designer at Amway. The company is famous for selling nutritional supplements and soap, but apparently Amway has been busy diversifying over the years. I was interested in finding out more about Amway’s electronics development. Dugan sat down with me to discuss his role at Amway, and how this company grew into an $8 billion global giant.

Altium Designer Increasingly Used for High-Speed Design

I recently met with Mark Forbes, the director of technical marketing at Altium, during the AltiumLive event in San Diego. We discussed Mark’s class on MCAD/ECAD collaboration and the success of AltiumLive, as well as the growth of Altium users who design high-speed PCBs with Altium Designer.

Catching up With Scott McCurdy and Freedom CAD

During PCB West, Scott McCurdy of Freedom CAD Services sat down with Technical Editor Tim Haag for an interview. We discussed Freedom CAD’s latest news, some trends in PCB design software tools, and the continuing need to draw more young people into a career in PCB design.

Rick Hartley is Bullish on PCB Design, 3D Printing

At the recent PCB West in Silicon Valley, Consulting Technical Editor Tim Haag met with long-time design industry veteran Rick Hartley to discuss the changing landscape of circuit board design, the layout designers of the future, and how designers can benefit from 3D printing of circuit boards.

One-Question Survey, Part 2: What Advice Would You Offer a New Designer?

During AltiumLive 2018, the I-Connect007 editorial team asked some of the attendees to answer one question: What advice would you offer to a brand-new PCB designer? Here are just a few of the replies we received.

Leo Lambert Discusses IPC Training Program Updates

During SMTA International, EPTAC Technical Director Leo Lambert and Managing Editor Nolan Johnson discuss a variety of recent IPC educational program updates, many of which are designed to smooth out the training process. Lambert also explains how these changes will allow EPTAC instructors to optimize the way they present IPC classes, which include the CID and CID+.

Artificial Intelligence: The Future of EDA?

Artificial intelligence (AI) has been making inroads into a variety of industries in the past decade or so, from automobiles to medical devices. Naturally, EDA tool companies are taking a look at AI. Does AI offer a way forward for PCB design tool developers? I recently interviewed Paul Musto, director of marketing for the Board Systems Division of Mentor. We discussed Mentor’s plans for integrating AI into EDA tools, and why we may be at the very beginning of understanding the pros and cons of this new technology.

One-Question Survey: What Advice Would You Offer a New Designer?

During AltiumLive 2018, the I-Connect007 editorial team asked some of the attendees to answer one question: What advice would you offer to a brand-new PCB designer? Here are just a few of the replies we received.

Institute of Circuit Technology Hayling Island Seminar

After an extreme summer heat wave had left trees dehydrated and struggling to morph into their customary display of reds and golds, the leaves were brown and brittle as the great and good of the UK printed circuit board industry crossed the bridge from the mainland of the south coast of England to Hayling Island for the autumn seminar of the Institute of Circuit Technology on September 20, 2018.

AltiumLive 2018 a Mecca for PCB Designers

AltiumLive 2018 San Diego is now in the history books. This is the second annual AltiumLive (North America), and it was even better than the first. With nearly 300 hundred participants, from all parts of the country and industry, the event was a huge success.

AltiumLive to Feature Altium Designer 19 Release

This week, Altium Designer 19 will be officially launched to the public during AltiumLive, which takes place October 3-5 in San Diego. I asked Altium COO Ted Pawela to give us a preview of Altium Designer 19, and to explain how AD19 fits in with the company’s long-term plans. He also discusses Altium Live’s plan to provide PCB design content that is not vendor-specific to help support the entire industry, not just customers.

Artificial Intelligence: More Questions than Answers

I’ve been covering artificial intelligence (AI) and related technologies for years, particularly at events such as the annual Consumer Electronics Show (CES). As I write this, we are in the run-up to CES 2019, and the Artificial Intelligence Conference in San Francisco, so the AI landscape is likely to change—at an ever-accelerating rate. Let’s look at some of the challenges facing AI now, and then after CES 2019 we can take another look.

Lee Ritchey Returns to AltiumLive with 32 Gbps Design Class

Lee Ritchey was one of the instructors for last year’s inaugural AltiumLive event, which drew hundreds of PCB designers. Now, Lee is back, teaching a high-speed design class at next week’s AltiumLive in San Diego. That class is sold-out, but you can catch Lee teaching the same class at the January AltiumLive event in Germany. I asked Lee to explain what he plans to cover in this course, and why PCB designers and design engineers should consider attending one of the events.

Moving From 28 Gbps NRZ to 56 Gbps PAM-4: Is it a Free Lunch?

The usual way of signaling through PCB interconnects is a two-level pulse, an encoding of 1s and 0s or bits, named NRZ (non-return-to-zero) or PAM-2 line code type. Increasing the data rate with the NRZ code type presents some obstacles. For a 28 Gbps NRZ signal, the bit time is about 35.7 ps with the main spectral lobe below 28 GHz. For a 56 Gbps NRZ signal, the bit time is about 17. 86 ps, with the main spectral lobe below 56 GHz. One can feel the problem already: Getting PCB interconnect analysis and measurements up to 56 GHz and beyond is very challenging, to say the least.

Judy Warner: AltiumLive’s Second Year to Be Even Better Than First

Last year, Altium launched its AltiumLive event with shows in San Diego and Munich, Germany. This year, the event has expanded to include an extra day of classes. Altium is gearing up for the San Diego event in early October and the German show in January 2019. I recent spoke with Judy Warner, director of community engagement for Altium, about what designers should expect at both shows, and how the company can build on the success of the 2017 events going into the future.

PCB Design Challenges: A Package Designer’s Perspective

The challenges faced by the PCB designers of today are significant. If we examine the breadth of designs, we find ever-increasing data rates and more high-speed signal routing that drive additional challenges meeting signal-quality requirements, including reflection signal loss and crosstalk issues. At the same time, designers are being asked to complete designs in shorter cycle times and in smaller form factors. They must come up with new and more complex routing strategies to better control impedance and crosstalk. Manual implementation is often time-consuming and prone to layout errors.

Managing the Challenges of Flex and Rigid-Flex Design

PCB designers working with flex or rigid-flex technology face many potential risks that can derail a project and cause costly design failures. As the name implies, flex and rigid-flex designs comprise a combination of rigid and flexible board technologies made up of multiple layers of flexible circuit substrates, attached internally and/or externally to one or more rigid boards. These combinations provide flexibility for the PCB designer working on dense designs that require a specific form factor. Rigid-flex allows the PCB design team to cost-efficiently apply greater functionality to a smaller volume of space, while providing the mechanical stability required by most applications.

Chuck Bauer Discusses the Future of Packaging

When we decided to cover the future of PCB packaging, we knew we would have to interview Charles Bauer, Ph.D., owner of TechLead Corporation. Chuck recently spoke with Happy Holden, Andy Shaughnessy and Barry Matties about current trends in packaging, the need for product designers and manufacturers to communicate, and why no matter how cool the technology is, cost is still king.

BGA Fanout Routing Overview

PCB developers are deluged with new challenges caused by increasing density and smaller components. Ball grid arrays (BGAs) create particular challenges during layout, with hundreds of connections in just a few square centimeters. Fortunately, designers now have options for addressing these issues.

The Impact of PCB Dielectric Thickness on Signal Crosstalk

Crosstalk is an unintentional electromagnetic (EM) field coupling between transmission lines on a PCB. This phenomenon becomes a major culprit in signal integrity (SI), contributing to the rise of bit error occurrence in data communications and electromagnetic interference (EMI). With the existence of mutual inductance and capacitance between two adjacent transmission lines on a PCB, crosstalk has become more severe due to the shorter signal rise/fall times at today’s higher data speed rates.

Mentor Preparing for Next-Gen PCB Designers

Millennials are the future of our industry. What does this mean for the PCB design community? How do we attract more of these smart young people to the world of PCB design? I asked Paul Musto, director of marketing for Mentor’s Board Systems Division, to explain the company’s initiatives aimed at drawing more young people into PCB design

In With the New at Cadence

The next generation of PCB designers is coming—slowly, but surely. What will this new group of designers mean for EDA vendors like Cadence Design Systems? Andy Shaughnessy recently interviewed Dan Fernsebner, product marketing group director and a veteran EDA guy, and Bryan LaPointe, lead product engineer and representative of the younger generation. They discussed the next generation of PCB designers, some of the best ways to draw smart young people into this industry, and why the PCB designers of the future may need to have a college degree just to get an interview.

Help Wanted: PCB Design Layout Specialist

I was told recently that the designer, aka the PCB layout specialist, is a dying breed soon to be extinct. I wish to reassure my fellow designers that, in my opinion, you are in the catbird seat. You are in hot demand and you should have great opportunities for the remainder of your career. By the way, after reading this article, you may feel empowered to go ask for a raise. Please don’t tell your manager that I sent you!

Multi-board Design with Altium’s Ben Jordan

Not too long ago, historically speaking, most electronic products contained only one PCB. But multi-board designs have become almost ubiquitous over the past decade, and EDA software companies are working to improve and simplify the multi-board design process. Editors Andy Shaughnessy and Stephen Las Marias spoke with Ben Jordan, director of product and persona marketing for Altium, about the company’s multi-board design tools, the challenges that customers face, and the numerous trade-offs that designers must contend with while performing multi-board design.

CPCA 2018 Seminar Overview

I had the good fortune to speak at a seminar sponsored by the CPCA and organized by the China Team of I-Connect007 in Shanghai. This full-day seminar was on one of today’s hot topics, “Automation in PCB Manufacturing.”

Achieving Optimum Signal Integrity During Layer Transition on High-Speed PCBs

In electronic systems, signal transmission exists in a closed-loop form. The forward current propagates from transmitter to receiver through the signal trace. Meanwhile, the return current travels backward from receiver to transmitter through the power or ground plane directly underneath the signal trace that serves as the reference or return path. The path of forward current and return current forms a loop inductance. It is important to route the high-speed signal on a continuous reference plane so that the return current can propagate on the desired path beneath the signal trace.

Sensible Design: Protecting PCBs from Harsh, Challenging Environments

Think very carefully about the sort of environment your PCB is likely to encounter. It is easy to over-engineer a product so that it will survive the very worst of conditions, but worst conditions may only be fleeting or transient. Therefore, a resin solution with a lower temperature performance specification will often cope. Take temperature extremes, for example. Your application may experience occasional temperature spikes of up to 180°C, which you might feel deserves treatment with a special resin.

Paving the Way for 400Gb Ethernet and 5G

This article briefly introduces the 4-level pulse amplitude modulation (PAM-4) and its application in 400 Gigabit Ethernet (400GbE), to support the booming data traffic volume in conjunction with the deployment of 5G mobile communications. Furthermore, this article also highlights the essential pre-layout effort from signal integrity perspective for physical (PHY) link design on a PCB, including material selection, transmission line design and channel simulation to support 56Gbps data rate that paves the way for seamless communication in 400GbE.

Excerpt: The Printed Circuit Designer’s Guide to…Flex and Rigid-Flex Fundamentals

The design process is arguably the most important part of the flex circuit procurement process. The decisions made in the design process will have a lasting impact, for better or worse, throughout the manufacturing cycle. In advance of providing important details about the actual construction of the flex circuit, it is of value to provide some sort of understanding of the expected use environment for the finished product.

Faster Board Speeds Demand Constraint-Driven Design

Using powerful constraint techniques can be a double-edged sword. While the design process is made much safer by including constraints, it is all too easy to over-constrain the design and make it impossible to complete routing and placement. Even paper design guidelines can make products uneconomic to produce unless a great deal of engineering knowledge is applied during the design.

Making the Most of PCB Materials for 5G Microwave and mmWave Amps

Ready or not, 5G is coming, and it will require the right circuit materials for many different types of high-frequency circuits, including power amplifiers. 5G represents the latest and greatest in wireless technology, and it will be challenging to design and fabricate, starting with the circuit board materials, because it will operate across many different frequencies, such as 6 GHz and below, as well as at millimeter-wave frequencies (typically 30 GHz and above).

Mark Thompson: What Designers Need to Know about Fab

Mark Thompson wants to help PCB designers. He’s seen it all in CAM support at Prototron Circuits: the incomplete or inaccurate data packages, boards that are unnecessarily complex or over-constrained, and so much more. Mark just returned to writing his popular Design007 Magazine column, The Bare (Board) Truth, which addresses questions such as, “What happens to your design at CAM?” I asked Mark to explain why it’s so important for designers to communicate with their fabricators, and why they need to get out of the office and visit a board shop every now and then.

Design and Manufacturing Perspectives from DISH Technology’s Les Beller

I recently interviewed Les Beller, a long-time PCB designer who is now a manufacturing engineer for DISH Technology. We discussed his company’s business shift towards 5G and streaming, and the stresses that puts on a design team. He also explains the greatest challenges that he’s facing with HDI and higher frequencies, and the added importance for designers to understand the manufacturing process and DFM tools.

Geeking Out at Geek-A-Palooza MSP 2018

Kiersten Rohde, I-Connect007 editor, covers Geek-A-Palooza MSP 2018. Geek-A-Palooza "is a different kind of gathering that combines networking with a fun, relaxing atmosphere." This event provided an opportunity for local electronics geeks from every industry segment to gather for a professional social event that included great music, food, drinks, games, raffle prizes, and booths.

EDADOC: A Driving Force in China's Automotive Electronics Design

EDADOC is one of the biggest providers of PCB design and manufacturing services in China, with a long history in automotive electronics design and manufacturing. China Editor Edy Yu recently conducted an email interview with EDADOC R&D Technical Research Manager William Zhou and Brand Planning Specialist Wen Ling, who collaborated on their answers. We discussed the challenges related to designing and fabricating automotive PCBs, the opportunities in this segment, and the trends they see in the market for autonomous and electric vehicles.

Expert Discussion: Dan Feinberg on Automotive Electronics

A fixture at the Consumer Electronics Show, Dan Feinberg has been covering autonomous, hybrid and electric vehicles for years, along with the rapid growth of high-tech electronic gadgetry in traditional vehicles. In this freewheeling expert discussion, Dan spoke with Barry Matties, Patty Goldman, and Happy Holden about the future of auto electronics and what it all means to the PCB industry.

Zuken Pulling Ahead in Automotive PCB Design

Zuken has been developing PCB design tools for the automotive market for years. With automotive electronics worth over $200 billion globally, and growing every day, Zuken is preparing for a brave new world of smart cars, and autonomous and electric vehicles. I spoke with Humair Mandavia, chief strategy officer with Zuken, and asked him about the challenges facing automotive PCB designers, and the trends he’s seeing in this constantly evolving segment of the industry.

Estonia a Hot Spot for New Technology

Most Westerners know very little about Estonia. A former Soviet Bloc country, Estonia has come a long way since restoring its independence in 1991. Electronics companies are thriving in this tiny EU member country, and capital city Tallinn has been called “Silicon Valley on the Baltic Sea.” During productronica, I met with Arno Kolk, general manager of the Estonian Electronics Industries Association, and we discussed the explosion of new technology in this “Baltic Tiger” country?

Fadi Deek Discusses Mentor’s New Power Integrity eBook

At DesignCon 2018, I ran into Mentor’s Fadi Deek, the author of both of Mentor’s I-Connect007 eBooks: the newest, "The Printed Circuit Designer’s Guide to Power Integrity by Example," and their first book, "The Printed Circuit Designer’s Guide to Signal Integrity by Example." We sat down and discussed how the idea for the books came about, as well as some of the power integrity challenges facing PCB designers and engineers.

Jan Pedersen: CircuitData Enhances Current Data Formats

During the Design Forum at IPC APEX EXPO 2018, Jan Pedersen, senior technical advisor for the PCB broker Elmatica, gave a presentation on CircuitData. The language is designed to help facilitate other design data transfer formats such as Gerber, ODB++, and IPC-2581. Jan spoke with Managing Editor Andy Shaughnessy and Contributing Technical Editor Happy Holden about how this open language works with the existing data formats, as well as the need to eliminate paper documents from design process, and how the industry can help shape this open-source language.

Mentor’s HyperLynx Automates SERDES Channel Design

Mentor recently released the newest version of its HyperLynx signal integrity software. This version may be the first SI tool in the industry to fully automate SERDES design channel validation. I spoke recently with Chuck Ferry, product marketing manager with Mentor, about the new HyperLynx and some of the new serial link design capabilities that customers have been demanding.

Cadence’s Sigrity Automates Power Integrity Simulation Earlier in Design Cycle

DesignCon is always a great place to check out the latest PCB layout and simulation software tools. During DesignCon 2018, Guest Editor Kelly Dack met with Sam Chitwood, a product engineer with Cadence. Sam explained how the Cadence Sigrity simulation software now allows users to make decisions early in the design process, and how this can help optimize the design of the power delivery network and ensure signal integrity in complex PCBs.

South African Electronics Industry Going Strong

EDA Technologies is a South African company that offers PCB design engineering services, mainly for the domestic electronics market, which makes up a surprising 12.5% of South Africa’s GDP. Barry Matties recently spoke to founder Nechan Naicker about the benefits of outsourcing to South Africa, the market segments they service there, and any advice he had to offer from his 20+ years in the industry.

Worldwide Systems Consulting: Tools, Process, People

In Munich for productronica, Editor Andy Shaughnessy and Publisher Barry Matties sat down with Mentor’s Jay Gorajia, director of worldwide systems consulting. Gorajia discussed Mentor’s systems consulting business, their focus on the “digital twin,” and how their acquisition by Siemens is benefitting Mentor and their customers.

IPC-2581 Demo Draws a Crowd at IPC APEX EXPO

During IPC APEX EXPO 2018, the IPC-2581 Consortium held a demo of this open-source data transfer standard, attracting numerous designers, fabricators and assembly providers. Jim Pierce of Axiom Electronics and Bob Miklosey of Aegis Software sat down to discuss the demo and their involvement with the consortium. Axiom now charges more for designs submitted in the Gerber format.

RTW IPC APEX EXPO: Polar Instruments Discusses New Engineer, SpeedStack Upgrades

During IPC APEX EXPO 2018, Polar Instruments' Lupita Maurer and Geoffrey Hazelett sat down with Editor Andy Shaughnessy to discuss upgrades to their SpeedStack tool and Lupita's new position with the company.

Part 2: EIPC’s 2018 Winter Conference in Lyon, Review of Day 1

We continue with the rest of Pete Starkey’s report on Day 1 of the EIPC Winter Conference in Lyon, France. Included in this segment are presentations by Ventec, Ericsson, TTM and others, plus photos of their evening tour of Alstom.

Real Time with... DesignCon: Mentor Partners with Sintecs on EU Project

During DesignCon 2018, Guest Editor Kelly Dack interviewed Sintecs' CEO Evert Pap and system architect Hans Klos in the Mentor booth. Sintecs used Mentor's software tools to design the dReDBox, a virtual prototype project funded by the European Union.

Entering—and Enjoying—the Industry

I was recently given the opportunity to write an article for our publication. Being somewhat new to this industry, I figured it would be a good idea to write an introduction on how I got into electronics—specifically the part most people my age don’t give thought to.

EMA Cloud Lined with Capability

Editor Kelly Dack speaks with EMA Design Automation Marketing Manager Chris Banton about the company's new free cloud-based OrCAD schematic capture tool, OrCAD's design constraint manager, and the Sigrity electrical rule checker.

Mentor Focusing on Power and Signal Integrity

Chuck Ferry is a product marketing manager at Mentor, and SI/PI product architect for HyperLynx tools. I spoke with Chuck recently during DesignCon 2018, and he shared some of his thoughts on the industry and Mentor’s plans for this year and beyond.

A Conversation with Dorine Gurney, New President of Polar Instruments

Dorine Gurney has recently been named president of Polar Instruments. With a 30-year resume that includes management positions at Mentor Graphics, Lattice Semiconductor and Tektronix, she takes the reins as Ken Taylor heads into retirement. I recently caught up with Dorine at DesignCon 2018 in Santa Clara, California.

Pulsonix Ready for 2018

Pulsonix has been developing PCB design software for almost 20 years, establishing a reputation for its full-featured, low-cost design tools. Now, the UK-based company wants to break into the US market, and Pulsonix recently showcased its latest tools at PCB West. During the show, I spoke with Business Development Manager Ty Stephens about the company’s latest tools and plans to become a major player in the US market.

Nano Dimension’s 3D Printing: Prototypes at the Push of a Button?

SICK AG is a global manufacturer of sensors and sensor solutions for industrial applications, with headquarters located in Waldkirch, Germany. After a demo of Nano Dimension’s new 3D printing machine at productronica, Barry Matties met with SICK’s Danny Wernet to discuss its pros and cons and get his overall impression of the technology. Are 3D prototypes really as simple as feeding in a Gerber file and pushing a button?

Dr. Johannes Adam Gets Hot on Thermal Management

Thermal management expert Johannes Adam, PhD, was kind enough to take the train from his home in Leimen, Germany to meet with me during productronica in Munich. He is the creator of TRM (Thermal Risk Management) software and contributor, with Douglas G. Brooks, of "PCB Trace and Via Currents and Temperatures: The Complete Analysis, 2nd Edition." He’s also working on his own book on thermal management. Johannes sat down for an interview, and I asked him to share his views on the current state of thermal management for PCBs, and what the industry can do to put the spotlight on what’s hot in PCBs.

Mike Jouppi Discusses his Drive for Better Thermal Data

If you mention thermal management in a group of PCB designers and design engineers, Mike Jouppi’s name usually pops up. Mike is an engineer and founder of the Thermal Management LLC consulting firm. He spent years updating IPC’s charts on current-carrying capacity, which had been unchanged since the 1950s. I recently caught up with Mike and asked him to give us his views on the state of thermal management, as well as the tools and standards related to thermal design.

IEEE’s Romanian SIITME Show a Success

The 23rd annual IEEE International Symposium for Design and Technology in Electronic Packaging (SIITME) was held in Constanta, Romania, in October 2017. It attracted more than 190 participants from Romania, and 13 other counties. While there might be some who question the suitability of Romania as a venue for such a conference, the country has a long technological history and has produced some top innovators and pioneers in aviation including Aurel Vlaicu, Traian Vuia, Henri Coanda, who prototyped an early jet aircraft in 1910.

Mentor White Paper: Characteristic vs. Instantaneous Impedance

Successful signal integrity analysis depends on a fundamental concept: impedance. Without a thorough understanding of the impedance values that a signal encounters along the way, designers cannot maintain good signal quality from source to receiver.

The Impact of HDI on PCB Power Distribution

A key aspect of HDI technology is the use of microvias. For reference, the IPC HDI Design Committee has identified microvias as any hole equal to or less than 150 microns. Multiple types of HDI stack-ups associated with blind and buried microvias can be used to meet the density and cost requirements for today’s products. Design teams should develop stack-ups in conjunction with the fabricator to minimize cost and meet signal integrity requirements.

Heat Transfer and Thermal Conductivity: The Facts

In my first two columns, I presented a broad introduction to the subject of thermal management of electronic circuits. This month I’m taking a closer look at thermal interface materials—how they can be applied to achieve efficient heat transfer, and the significance of bulk thermal conductivity in relation to heat transfer and thermal resistance.

Three Perspectives for HDI Design and Manufacturing Success

Mike Creeden has been in the PCB design industry for more than 40 years now. In June 2003, he founded San Diego PCB Inc., a design bureau serving a variety of industries, including industrial, automotive electronics, medical diagnostics, internet of things (IoT), defense, aerospace, and communications markets. So, we asked Creeden to share his insights about HDI, and how designers and manufacturers can address those issues.

Lee Ritchey On the Future of PCB Design

I spoke with long-time PCB design instructor and Right the First Time author Lee Ritchey during the recent AltiumLive event in Germany. Lee and I discussed everything from the advice he offers to young PCB designers to his thoughts on where the industry is going and what’s missing from today’s electrical engineering curriculum.

Cannonballs, eBooks, and Signal Integrity

I-Connect007 editors Andy Shaughnessy and Pete Starkey recently met with Polar Instruments Managing Director Martyn Gaudion at productronica. They discussed the success of "The Printed Circuit Designer’s Guide to…Secrets of High-Speed PCBs," the ongoing challenge of facilitating communication between designers and fabricators, and the influence of chemical bond-enhancement processes on insertion loss.

Zuken Teams With Nano Dimension for 3D Printing Design Flow

At PCB West, Zuken shared a booth with Nano Dimension. Zuken has been working with Nano Dimension for some time, and adding support for 3D printing and nanotechnology to its design tool platforms. I sat down with Zuken’s Humair Mandavia and Nano Dimension’s Simon Fried to learn more about this alliance, and to find out more about this odd-looking box being demonstrated in Zuken’s booth.

Video from productronica 2017: Karel Tavernier on Ucamco's New Communic8tor

European Editor Pete Starkey and Ucamco Managing Director Karel Tavernier discuss Ucamco’s cloud-based Communic8tor platform which facilitates two-way communication between the CAM engineer and the PCB designer, or any other party involved in the manufacturing process. This gives real-time access to image data and annotations, enabling queries to be resolved, changes to be approved, and a full communications history to be maintained.

Signal Integrity: The Experts Weigh In

When we began planning the October issue on signal integrity, we arranged a conference call with a variety of industry experts. Mike Steinberger of SiSoft, Mark Thompson of Prototron Circuits, and Yogen and Sunny Patel of Candor Industries joined editors Andy Shaughnessy, Patty Goldman, Happy Holden and Publisher Barry Matties on the call for a spirited discussion about the challenges related to signal integrity and some of the tricks of the trade for helping ensure SI.

Nine Dot Connects: Good Design Instruction is a True Value-Add

Nine Dot Connects has certainly blazed an interesting trail. The company started out as an Altium reseller, but in less than a decade, Nine Dot Connects has also become a design service bureau and a provider of PCB design instruction, training, and consulting services. I recently interviewed Paul Taubman, technical services director for Nine Dot Connects. We discussed the company’s expansion from VAR to service bureau and content provider, and the changing landscape of PCB design instruction.

AltiumLive Summit—Munich, Germany, Part 1

Altium held a very successful AltiumLive PCB Design Summit in San Diego, California at the beginning of October for the benefit of their North American design community, and followed it three weeks later with a counterpart European event in Munich. And what an eye-opener it proved to be—literally hundreds of delegates, a superbly organised and managed programme, billed as a completely immersive two-day interactive design experience on a theme of learning, connecting and getting inspired.

Happy Holden and Charles Pfeil Discuss the Past and Future of PCB Design, Part 1

When it comes to the PCB design community and the challenges facing it, as well as where design has been and where it’s heading, there aren’t many people as qualified to speak on the topic as long-time industry veterans Happy Holden and Charles Pfeil. Joined by I-Connect007’s Barry Matties at the recent AltiumLive 2017 event in San Diego, the three sat down for a discussion about the current state of PCB design, what the future holds, and what it means to be a designer.

Insulectro Teams with Isola to Address Signal Integrity Needs

Insulectro and Isola recently shared a combined booth during PCB West 2017. Insulectro has distributed Isola materials for years, and the companies wanted to focus on Isola’s line-up of high-speed, low-loss material sets. Insulectro’s Chris Hunrath, VP of Technology, and Norm Berry, Director of Laminates and OEM Marketing, sat down with me to discuss the challenges facing signal integrity engineers today, and some of the Isola low-loss, low-Dk materials that can help with their signal integrity requirements. You might find Chris and Norm speaking to a group of PCB designers near you.

AltiumLive 2017 Munich: Sold Out!

I recently sat down with Ted Pawela, Lawrence Romine, and Judy Warner of Altium to wrap up their sold-out AltiumLive 2017 PCB Design Summit in Munich, Germany. This conference, following on the heels of an AltiumLive event in San Diego, was packed full of PCB designers who attended a series of great keynotes and an excellent technical program. We discussed some of the highlights of the show, including designers’ reactions to a new version of Altium Designer 18 and the brand-new Altium Nexus tool.

The History of Predictive Engineering

It all started in 1983, at HP, when I complained to our group's vice president that our W. Edwards Deming and Total Quality Management (TQM) Six Sigma training was being concentrated in PCB manufacturing. We had eliminated final inspection and instead placed quality in the hands of the operators with a final electrical test. The electrical test was governed by what we learned from Deming.

Carl Schattke: I Started Designing Boards When I Was 12

Growing up with a father who owned a PCB design bureau, Carl Schattke, CID+, may have been predestined to design circuit boards for a living. In fact, he’s been designing boards for nearly his entire life. Carl gave a keynote speech at the recent AltiumLive event in San Diego, where I caught up with him to discuss a lifetime spent in PCB design, as well as the graying of the PCB design community and what might be done to inspire a youth movement in PCB design.

GCSI's James Kozich Discusses Industry Hiring Trends

James Kozich of Gilbert Consulting Services has been matching qualified technologists with the right jobs for decades, from the shop floor to C suite positions. During SMTA International, he sat down with Andy Shaughnessy to discuss the recent hiring trends he's seeing in electronics manufacturing.

Meet One of the Industry’s Newest PCB Designers

Molly Knewtson is a recent graduate now working for a pharmaceutical company as a mechanical engineer. She was asked if she would consider learning PCB design and taking on some design projects. She agreed, though she had never considered circuit design as a career path. I sat down with Molly at PCB West to learn how she came to this position and what might be done to inspire more people from her generation to join the industry.

Dan Beeker’s AltiumLive Keynote: It's All about the Space

Dan Beeker of NXP Semiconductors was a keynote speaker at the recent AltiumLive 2017 event in San Diego. His presentation focused primarily on the design of three-dimensional structures and how it’s all about space. I caught up with Dan, and we discussed his presentation, his background and career, and what kind of advice he would give to young PCB designers.

It’s Not Your Father’s DFM Anymore

What does DFM look like today? Well, for one, it’s become more than DFM. We now expect our software tools to serve us more completely to take new designs to market. DFM has evolved to become an integral part of new product introductions (NPI). Today’s NPI software spans design and manufacturing to accelerate the optimization of a PCB for manufacturing. It looks at the entire design-to-manufacturing release process and deliverables, then streamlines them.

RTW SMTAI: Judy Warner Discusses AltiumLive: 2017 and Her New Role

At SMTA International in Rosemont, Illinois, Judy Warner of Altium discusses her new role as director of community engagement. She also details AltiumLive: 2017, which takes place October 3-4 at the Hilton San Diego Resort and Spa. AltiumLive features Happy Holden and Charles Pfeil, as well as a robot design challenge and battle.

Enough Blame to Go Around

The idea for this article began a few months ago when The PCB Design Magazine conducted a reader survey regarding the topic “Whose Fault is that Bad Board?” After some thought, I submitted my answers. After all, I must have some kind of input after over 25 years of PCB design. But still, whose fault is that bad board? OK, I know what you’re thinking: Don’t go there. We designers make mistakes too.

Resins: Cutting Through the Technical Jargon

This month, I’m going to cut through some of the more heavy-going tech-speak, taking a few of my customers’ more frequently asked questions about resins to try to help you refine your selection process. There’s a lot of ground to cover, but for the purposes of this column, let’s concentrate on the PCB’s operating environment, caring for the components that are to be encapsulated, and the special needs of applications like LED lighting and RF systems.

New Challenges Facing Mil/Aero Segment

For this month's issue, we invited a sampling of professionals whose experience centers on the electronics industry in the military and aerospace world, including experts from design, PCB manufacturing, and the assembly arena to sit down with us for a frank discussion. Our discussion centered on the challenges associated with military work, including the new regulatory requirements for cybersecurity, dealing with leaded vs. lead-free components, and the differences and similarities with the commercial world.

Stephen V. Chavez Talks Mil/Aero PCB Design

Stephen V. Chavez, CID+, is the lead PCB designer for the Electronic Systems Center division of UTC Aerospace Systems (UTAS), a military contractor that builds all manner of cutting-edge tools for the American warfigher. He’s been designing military and aerospace PCBs for decades, and he’s a veteran of the United States Marine Corps. I caught up with Steph and asked for his thoughts on designing PCBs for the military and aerospace markets.

Trilogy Circuits: Mil/Aero Demands Technological, Regulatory Expertise

In the 16 years since its founding, Trilogy Circuits has become one of the go-to companies for mil/aero PCB design and manufacturing. I spoke with Charlie Capers, president and founder of the Richardson, Texas firm, about how he keeps ahead of the game. As he explains, succeeding with mil/aero PCB work requires not only mastery of the technological side, but of the regulations and certifications as well.

Embedded Technology: A Useful Tool in Freedom CAD’s Toolbox

Freedom CAD has been designing and fabricating boards with embedded technology for years, and doing some pretty innovative work along the way. I asked Scott McCurdy, Freedom CAD’s director of sales and marketing, to share some details about their embedded processes, as well as the challenges and opportunities that embedded technology offers.

Better Together: How HDP User Group Showcases the Industry’s Best Side

HDPUG is a non-profit trade organization comprised of members from top companies in the electronics industry, from materials suppliers and manufacturers, to OEMs and end users. Key activities include collaborating on issues facing multiple industries and bringing people together on projects who might not have met otherwise. Barry Matties met HDPUG’s European representative and project facilitator Alun Morgan at the recent EIPC Summer Conference to learn more about the group and current projects.

Romania’s PCB Design Students Compete at TIE 2017

During the last week in April, the 26th Interconnection Techniques in Electronics (TIE) show was held at the Gheorghe Asachi Technical University in Iasi, Romaina, a wonderful hill town not unlike Rome. The event, a convention for the Romanian electronic packaging community, included a series of actions designed to draw smart young students to the electronics industry, which is clearly growing. Participants had only four hours to create this PCB design, which was generated by a team of professionals from Continental Automotive Romania Timisoara.

Must Work Well on a Team; CID a Bonus

Throughout my decades-long career in PCB design, I have been fortunate. I’ve only had to search for a job out of desperation once. I had no idea my IPC Certified Interconnect Designer credentials would come in handy when I hit the pavement. It also helped that I am known to "work well on a team." It turns out that being able to play well with others is a real plus in the PCB design community.

Bruce Mahler Discusses Ohmega’s Resistive Material Technology

Bruce Mahler, vice president of Ohmega Technologies, sat down for an interview with me at DesignCon 2017. He discussed the company’s latest embedded resistive materials, as well as some of the drivers and challenges in that segment of the materials industry.

TTM Shines a Light on Optical Interconnect

Are embedded optics on PCBs set to make a breakthrough in the upcoming years? According to Dr. Craig Davidson, VP of Corporate Technology at TTM, it might be closer than you’d expect. In a recent interview with the I-Connect007 team, Craig outlines TTM’s current pursuit of high-volume manufacturing lines able to deliver embedded optical interconnect, what that would mean for the PCB industry, and why he thinks there will be manufacturing production capability by 2020.

Mentor Graphics Takes Best Paper Award at DesignCon

At DesignCon, I met with Dave Kohlmeier, senior product line director for Mentor Graphics. We discussed their Best Paper award and DesignCon sessions such as the Signal Integrity Boot Camp, as well as the new rigid-flex capabilities found in the HypeLynx suite.

A New Power Design Methodology for PCB Designs

Advanced PCB design is an iterative process of analysis-fix-analysis. Historically, this process is very time-consuming, requiring analysis experts and PCB designers to work together to find and fix layout problems. This article describes a new PCB design methodology that allows a PCB designer to perform the power design without having to run expert-level analysis tools. This methodology provides the setup automation for advanced analysis without the need to understand every minute parameter, and can be completed in a few steps.

Catching up with Polar Instruments' Geoffrey Hazelett

Product specialist Geoffrey Hazelett discusses some of the latest developments at Polar Instruments, including a new tool that will allow fabricators to determine how copper roughness will affect the end-product. He also talks about Polar's upcoming eBook on signal integrity, soon to be published by I-Connect007. Talented young technologists like Geoffrey are the future of our industry.

Cadence’s Zhen Mu Discusses Her Power-Aware Analysis Solution White Paper

At DesignCon, I met with Zhen Mu, senior principal product engineer with Cadence Design Systems, and Brad Griffin, product marketing director for Cadence. We discussed Zhen’s new white paper, “Power-Aware Analysis Solution.”

Kelly Dack and Mike Creeden: Are We in a PCB Design Renaissance?

Technical Editor Kelly Dack and San Diego PCB founder Mike Creeden discuss some of the trends they're seeing in the PCB design community, including greater numbers of young people becoming designers and more EEs doing design work. They also focus on IPC's training and designer certification efforts, and the need for designers to get out of the office and visit a board shop once in a while.

Real Time with...IPC: Jim Fuller Offers HDPUG Update

Sanmina's Jim Fuller gives his insight on how the High-Density Packaging User Group (HDPUG) shares the experience and resources of member companies to tackle projects and get results. Also, he reviews the study of the effect of copper bonding treatment on signal integrity

The Evolution of PCB Design and Designers

According to Rainer Asfalg of Altium, VP Sales EMEA, EDA companies owe it to their customers to provide much more than just a standard design tool. Barry Matties met with Rainer at the recent electronica show to discuss the continued evolution of the design process towards automation, and what this might mean for the education and overall requirements of PCB designers going forward.

True DFM: Taking Control of Your EDA Tool

We PCB designers are doing some truly great things with our layout tools. But we must remember that these tools are so powerful that they will sometimes allow us to design things that can’t be manufactured! We must collaborate with our fabricator and assembly brethren and embrace the best DFM practices, or face the consequences downstream.

IPC Designers Council San Diego Chapter Meeting: Flex Focus Fills the House

A report from the January meeting of the San Diego chapter of the IPC Designers Council. The meeting was hosted by the PCB design bureau San Diego PCB, with the featured guest speaker John Stine of Summit Interconnect. Stine’s presentation focused on flex and rigid-flex DFM, and he offered a variety of helpful design tips to the full house of 30-40 designers in attendance.

A Handy Compilation of Our Top 10 DFM Articles

When we started working on this DFM issue, I searched through our files and found that we’ve published some great DFM articles over the past year or so. While topics like signal integrity tend to get most of the limelight, in the end it all comes down to solid DFM practices. So, without further ado, we present this compilation of our Top 10 DFM articles and columns.

Flex and Rigid Sales and Marketing with Al Wasserzug

After decades in the PCB industry, Al Wasserzug of Cirexx International has seen marketing and sales trends come and go. I recently caught up with Al and interviewed him via email about the latest sales and marketing techniques, the value of traditional methods such as trade shows and conferences, and the particular characteristics of marketing flex circuits.

Top 10 Most-Read Design Articles of 2016

Every January, I like to go back through the last year and see which articles had the highest number of views. They're usually the articles that bring you PCB design and industry information that's relevant to your job. Check out the most-read PCB design articles from 2016.

Much Ado About Sales and Marketing

We recently surveyed our readers to get a better idea of what company leaders thought about sales and marketing. We sent this survey to several sales leaders; the results were informative, at times surprising, and even a bit disappointing, especially when participants reported that they had no sales and marketing plan at all. Does your company fall into that category?

SiSoft Discusses Signal Integrity Drivers and Challenges

In the last few years, SiSoft has launched a variety of innovative SI tools that help automate tasks that used to take weeks or months to complete. I recently interviewed CEO Barry Katz via email, and he detailed their customers’ challenges, and some of the market drivers in the world of signal integrity.

Lightning Speed Laminates: The Blending of High-Speed Digital and High-Frequency RF

When the terms high-speed and high-frequency are mentioned, people think they describe the same issue. But in reality, they can be two very different matters. The term high-speed generally refers to digital technology which transfers data at very high rates. But the term high-frequency is typically related to radio frequency (RF), which involves analog signals moving energy at high frequencies.

Mentor Graphics’ PADS Platform Bridges Design and Manufacturing

At PCB West, Barry Matties spoke with Paul Musto about Mentor’s PADS environment and their introduction of scalable software tools to help design better boards, from the enterprise level down to the entry level and hobbyists. They also discussed the evolution of the design process infrastructure in North America vs. Asia, and what design engineers should focus on to increase their value.

The Shaughnessy Report: Leadership vs. Management

Is your manager one of the great ones, a true leader? Many of your colleagues would probably answer with a pointed “No.” In our reader surveys, we ask, “What is your biggest challenge?” Every time we've posed that question, we received replies along the lines of, “Management doesn’t know what the hell they’re doing.” Some replies are too salty to print.

Freedom CAD: Navigating the Unpredictable Design Marketplace

As COO of the design service bureau Freedom CAD, Scott Miller has a front-row seat to the challenges currently plaguing designers and the design community as a whole. He shared his views with me recently, offering insights on the importance of picking the right partners and customer relationships in an unforgiving and sometimes unpredictable design marketplace.

Space: Still the Final Frontier

If this doesn’t make you feel like a “seasoned citizen,” I don’t know what will: "Star Trek" first aired 50 years ago, on Sept. 8, 1966. No one—not even the actors—thought the show would last, and it only ran for three seasons, drawing average ratings. But Captain Kirk and company are more popular than ever on their Golden Anniversary.

The Evolution of Altium: Road to a Record-Breaking Year

Chris Donato, VP of sales for Altium Americas, sat down with Judy Warner recently to discuss what he and Altium have been doing lately, where they came from (Australia) and what the future holds for Altium. This company has evolved from flying well under the radar during the acquisition frenzy of the ‘80s, to achieving a record $100 million in sales for fiscal year 2016.

Orange Co. Designers Council Meeting Draws A Packed House

Speaker John Stine, VP of operations at Summit Interconnect’s Anaheim facility, gave a presentation on flex and rigid-flex design and fabrication. At least 75 electronics professionals listened as Stine, an expert in flex and rigid-flex technologies, discussed proper trace geometries, grounding, cover lay, adhesives, signal integrity, impedance control, book-bindings and much more in his 80-minute presentation.

Sensible Design: When Coatings Go Wrong

This month, I consider some of the more common, and often very frustrating, problems that may be encountered when coating electronic circuit boards and components. I also discuss some practical solutions. As we all know, nothing in life is straightforward.

Signal Integrity Tools and Design Methodology in the Modern Age

The PCB design process has traditionally been done in silos. One group creates the design intent (schematic), another group implements the logic on the PCB, and yet another group does some checking of the design using analysis tools. This traditional approach has run into a number of problems.

New SI Techniques for Large System Performance Tuning

In this DesignCon paper, Donald Telian of SiGuys and Michael Steinberger and Barry Katz of SiSoft describe newly-developed techniques for equalization tuning and discontinuity reduction, offering additional design margin. Cost reductions are also achieved as new signal integrity techniques demonstrate performance parity, removing non-essential re-timers and PCBs layers.

The Gerber Guide, Chapters 15 and 16

Before sending your Gerber files off to your fabricator, you are often advised to check them using a reputable Gerber viewer such as GC-Prevue. This is excellent advice. Note that this involves more than just verifying that the viewer displays your intended image: It is important that you check too that the file is valid.

Software Bytes: Having Fun With Impedance

About a year ago, I was assigned a new project: become an expert in impedance, more or less. I had no idea how much this research would bring out the nerd in me. Even if you don’t typically design controlled-impedance circuit boards, you probably will eventually. Read on!

Getting Signal Integrity Right by Design

As clock frequencies increase and active devices and interconnect traces shrink and are placed ever closer together, signal integrity becomes an increasing challenge. Today, SI is typically addressed late in the design process after the PCB layout has been completed by performing complex and time-consuming 3D extractions and simulations for high-speed lines. But with little attention being paid to SI during the layout process, simulation frequently identifies numerous SI problems.

Beyond Design: Mastering “Black Magic” with Howard Johnson’s Seminars

Dr. Howard Johnson, the world’s foremost authority on signal integrity, has recently released his High-Speed Digital Design (HSDD) Collection. I recently reviewed all three of the seminars in this collection, a total of 36 hours of viewing time. If you want to gain some of Dr. Johnson's enthusiasm and master the art of high-speed design, then the collection is a must-have.

Designing With Tighter Tolerances

David Ledger-Thomas is a PCB design engineer with Honeywell Aerospace. He’s spent decades designing PCBs for a variety of applications, including defense, aerospace, computers, and high-performance audio. I asked David to share some of his thoughts on designing high-tech boards with increasingly finer spaces, traces and pitch.

The State of the Electronic Design Automation Nation

We are the automation nation. We are the high-speed demons, the low-frequency artists, the mixed-signal designers that make up the electronic design automation industry. We spend most of our working lives behind software, delivered to our fingertips with the promise of making things easier, faster, better, and getting us to our deadlines ever faster.

Beyond Design: The Case for Artificial Intelligence in EDA Tools

There has been a lot of activity in the field of artificial intelligence recently, with such developments as voice recognition, unmanned autonomous vehicles and data mining to list a few. But how could AI possibly influence the PCB design process? This month, Barry Olney will take a look at the endless possibilities.

Changing the World of PCB Rapid Prototyping

Tony Tung is a recent graduate from Taiwan who has come up with a new way for PCB designers and makers to create breadboards using printed paper circuits. I caught up with Tony at the recent San Mateo Maker Faire and sat down with him to learn more about this project.

EIPC Summer Conference 2016, Day 1: Strategies to Maintain Profitability in the European PCB Industry

Resplendent in the kilt, EIPC chairman Alun Morgan welcomed a large and enthusiastic gathering of printed circuit professionals from all over Europe and as far afield as the USA, Canada and Russia, to the EIPC Summer Conference 2016 in Edinburgh, Scotland's cosmopolitan capital city.

DownStream: What a Long EDA Trip it’s Been

No doubt about it: DownStream Technologies co-founder Joe Clark is an EDA veteran, with a history that dates back to the very beginning of EDA tools through the merger madness of the late ‘90s and beyond. I sat down with Joe during IPC APEX EXPO, and asked him about some of the changes he’s seen, and the direction of DownStream as it enters its 15th year.

The Shaughnessy Report: The Designer Roundtable Roundup

Every year, I attend SMTA Atlanta, just across town. You have to love a local trade show. No airlines, no jet lag, and no hotels. It’s a small show; it would fit in a school gymnasium. But for me, the highpoint of SMTA Atlanta is the Designers Roundtable. This year the roundtable had 15 attendees, up from 12 last year. Two of the new attendees were under 35, which surprised all of us "graybeards."

Design Automation Tools, Today and in the Future

Kelly Dack has been designing PCBs for over three decades, at OEMs of all kinds. Now a PCB designer with a Washington state contract manufacturer, Kelly enjoys waxing philosophic about PCB design and design automation in general. I asked Kelly about the direction EDA tools are headed, and whether he’d like to see more control, or more automation in his PCB design tools.

Beyond Design: DDR3/4 Fly-by vs. T-topology Routing

JEDEC introduced fly-by topology in the DDR3 specification for the differential clock, address, command and control signals. The advantage of fly-by topology is that it supports higher-frequency operation, reduces the quantity and length of stubs and consequently improves signal integrity and timing on heavily loaded signals. Fly-by topology also reduces simultaneous switching noise (SSN) by deliberately causing flight-time skew.

Designers Notebook: Flexible and Rigid-Flex Circuit Design Principles, Part 6

The designer is generally under pressure to release the documentation and get the flexible circuit into production. There is, however, a great deal at risk. Setting up for medium-to-high volume manufacturing requires significant physical and monetary resources. To avoid potential heat from management, the designer must insist on prototyping the product and a thorough design review prior to release.

The Roles of the Designer and the Design Engineer

Steve Hageman has been designing electronics since elementary school. An engineer by trade, he has decades of experience performing PCB design and layout. I asked Steve to give us his opinion about the divide between some PCB designers and their engineers, and what can be done to solve this problem.

Cadence Paper: Automating Inter-Layer In-Design Checks in Rigid-Flex PCBs

Flexible PCBs make it possible to create a variety of products that require small, lightweight form factors. As flexible PCB fabrication technology has matured, new design challenges have emerged. This paper discusses some of the key challenges and introduces a new PCB design approach that enhances productivity through in-design inter-layer checks.

The Partnership: Design Engineers and PCB Designers

Randy Faucette is founder, president and director of engineering at Better Boards Inc. in Cary, North Carolina. I asked Randy to talk about some of the occasional tension between PCB designers and design engineers, and what he thinks can be done to help open the lines of communication.

SiSoft: Optimizing the State of the Art

In the 20 years since its founding, SiSoft has been at the forefront of signal integrity analysis tool development. Now, the company is leading the way with a new technology called OptimEye and tools for creating accurate IBIS-AMI models. Todd Westerhoff, VP of semiconductor relations, gives us an update on the company’s newest technologies.

Behind the Scenes: Adcom’s TLA Award-Winning Design

Adcom’s design team placed first in this year’s TLA program, taking the top spot for the category of “Computers, Blade & Servers, Memory Systems.” This board, like most PCBs today, is a complex system designed by a multi-disciplinary team of designers, striving to bring an operational product to the market on schedule.

Quiet Power: Dynamic Models for Passive Components

A year ago, my Quiet Power column described the possible large loss of capacitance in multilayer ceramic capacitors when DC bias voltage is applied. However, DC bias effect is not the only way we can lose capacitance. Temperature, aging, and the magnitude of the AC voltage across the ceramic capacitor also can change its capacitance. This column will provide all of the details.

Design Strategies for Success—and Profit

In today’s economic environment, making money on a project is getting more and more challenging. Those years when businesses like mine were practically printing money are long gone. If you are under 30 years old, you probably do not have this point of reference; it’s been one downturn after another for your entire adult life. But for us older folks, times were really good back then. So, what happened? You happened, as well as a million others like you. In other words, the market is a little cramped now and much more competitive, which dilutes our profit per project.

Beyond FR-4: High-Performance Materials for Advanced Designs, Part 1

In the past 40-plus years of PCB manufacturing, the primary material of choice has overwhelmingly been e-glass supported FR-4 resin laminates. This is due to the excellent dimensional stability and reasonably acceptable thermal performance (based on glass transition temperature [Tg] and decomposition temperature [Td]). In general, these materials exhibit impressive performance and excellent cost for a wide range of applications.

Designers Notebook: Flexible and Rigid-Flex Circuit Design Principles, Part 5

The outline profile of the flexible circuit is seldom uniform. One of the primary advantages of the flexible design is that the outline can be sculpted to fit into very oblique shapes. This month, Vern Solberg focuses on outline planning, physical reinforcement, and accommodating bends and folds in flexible and rigid-flex circuits.

The Bare (Board) Truth: The Top 10 Ways Designers Can Increase Profits

So, can you truly increase profitability through PCB design practices? Prototron's Mark Thompson believes you can. And it starts with a philosophy that embraces DFM techniques. Then you must be ready for the initial release to a fabricator by ensuring that you are communicating all of your specifications and needs clearly to the fabrication house so that you get an accurate quote. Let’s dive in, starting with Number 10 and working our way to the most important way a designer can increase company profits.

Wild River: Simplifying SI so Engineers Can Focus on Design

Al Neves is founder and chief technologist of Wild River Technology, and he’s a signal integrity engineer who likes to tell it like it is. So when I bumped into Al during DesignCon, I asked him to sit down for an interview. We discussed the paper he co-wrote for DesignCon and the challenges SI engineers are facing, as well as Wild River’s efforts to take the black magic out of signal integrity.

Steinberger Talks PAM4, the Next Generation of Modulation

I recently interviewed our old friend Michael Steinberger, SiSoft’s lead architect for serial channel products. Steinberger is always a great interview; he breaks down complex signal integrity simulation technology in ways that are simple and often humorous. Steinberger sat down and discussed a paper he presented at DesignCon, and some of the challenges his customers are facing.

IPC APEX EXPO: Gary Carter on First Board Manufactured With IPC-2581B

Gary Carter, senior manager of CAD engineering for Fujitsu Network Communications, discusses the first board fabricated and assembled using IPC-2581B. This 20-layer board features 21,000 component pins and 15,000 holes, with controlled impedance on all layers. He also gave a presentation on IPC-2581B during the Design Forum.

What’s New at Cadence?

Cadence Design Systems has released a variety of PCB design tools lately, and we wanted to find out a little more about what’s new at Cadence. I tracked down Product Marketing Director Brad Griffin and asked him to discuss some of the newest technology coming out of Cadence.

The PDN Bandini Mountain and Other Things I Didn’t Know I Didn’t Know

Originally, Bandini Mountain referred to a mound of fertilizer built by the Bandini Fertilizer Company in California prior to the 1984 Los Angeles Olympics. When the company went bankrupt, this mound of fertilizer was left behind. Steve Weir coined this term to describe the large resonant frequency peak formed by the parallel combination of the on-die capacitance and the package lead inductance, as seen from the die looking into the PDN.

Designers Notebook: Flexible and Rigid-Flex Circuit Design Principles, Part 4

All of the design rules for the glass reinforced-portion of the board (land pattern geometry for mounting surface mount devices, solder mask and the like) are now well-established. One unique facet of fabricating the rigid-flex product is how the flexible portion of the circuit is incorporated with the rigid portion of the circuit. As a general rule for multilayer PCB design, furnish a balanced structure by building up the circuit layers in pairs (4, 6, 8 and so on).

IPC APEX EXPO: Prototron Works with Customers to Stay on Top

Prototron Circuits Operations Manager Mike Graves explains how his company's focus on customer service, including helping with PCB designs, has made Prototron "America's Board Shop." He also discusses their expansion into flex and HDI technology, and their efforts to achieve AS9100 certification.

IPC APEX EXPO: Hofer Discusses the Pros and Cons of Backdrilling

General Manager James Hofer of Accurate Circuit Engineering discusses the process of backdrilling vias, including the benefits and drawbacks. Backdrilling can improve signal integrity, but it can also create stubs that may act as unwanted antennas.

IPC APEX EXPO: Glenn Oliver on His IPC 'Best Paper' on High-Frequency Materials

Glenn Oliver of DuPont discusses his award-winning paper, “Round Robin of High-Frequency Test Methods by IPC-D24C Task Group." Co-authors include Jonathan Weldon of DuPont, John Andresakis of Park Electrochemical, Chudy Nwachukwu of Isola, John Coonrod of Rogers Corporation, David L. Wynants of Taconic Advanced Dielectric Division, and Don DeGroot of Connected Community Networks. The paper looks at high-frequency offerings from a variety of materials providers.

Mark Thompson: It’s All About Communication

In engineering support at Prototron Circuits, Mark Thompson has seen it all. He ensures that each design is manufactured the way the designer intended, even if the CAD data is not crystal clear. During DesignCon, Barry Matties and Andy Shaughnessy talked with Thompson about why communication is paramount when designing and prototyping boards. Thompson also explained how designers can avoid making common mistakes that can set back an entire project.

Technology Outlook with Mentor Graphics

Mentor Graphics recently announced the winners of its PCB Technology Leadership Awards. Now in its 26th year, this program provides a great barometer for measuring the newest trends in cutting-edge PCB designs. I caught up with Product Marketing Manager David Wiens and asked him to give us an idea of the trends he’s seeing in PCB design and manufacturing, and what the industry has in store for us in the next few years.

Designers Notebook: Flexible and Rigid-Flex Circuit Design Principles, Part 3

This installment of "Designers Notebook" will focus on methods for specifying base materials, and also address copper foil variations and fabrication documentation. It is important to research the various products in order to choose the one that best meets the design requirements.

DuPont, Taconic and PFC Team Up For High-Speed Flex

At DesignCon, I sat down with three flex circuit specialists: Glenn Oliver of DuPont, Tom McCarthy of Taconic, and Steve Kelly of PFC Flexible Circuits. Our discussion covered a lot of territory, most notably the findings they described in the paper they were about to present later that day at DesignCon, and the future of flex, as they see it.

Catching up With Tom Hausherr of PCB Libraries

When fate placed Tom Hausherr and I at PCB West, we made sure to carve out some time together. Tom agreed to have a long breakfast with me so I could learn more about the challenges related to component libraries and how his company addresses these issues. So, pull up a chair and join us for a chat.

Designers Notebook: Flex and Rigid-Flex Circuit Design Principles, Part 2

In this installment of "Designers Notebook," Vern Solberg discusses supplier assessment, planning of the flexible circuit outline, and various circuit routing principles. Communication between designer and fabricator is paramount, as well as an understanding of IPC-2223, which sets the specific requirements for the design of flex circuits.

Justifying the Need to Outsource Design Work

Mehul Dave and H.D. Shreenivasa of Entelechy Global discuss the many benefits of outsourcing and why it should not be thought of as a four-letter word. They also talk about the huge gap between design and manufacturing, and how their company can help customers address that issue.

Designers Notebook: Flex and Rigid-Flex Circuit Design Principles, Part 1

In his new Designers Notebook column, Verb Solberg discusses primary flex circuit structures, proper design for operating environment, and base material selection. The design guidelines for flexible circuits, although similar to those for rigid circuits, have distinctive differences that are influenced by specific applications and the intended operating use environments. Communication with your fabricator is paramount when designing flex and rigid-flex circuits.

IPC Designers Council Viewpoint: Gary Ferrari

As co-founder and longtime executive director of the Designers Council, Gary Ferrari has dedicated a big part of his career to PCB design. After decades of service, he was inducted into the IPC Hall of Fame at IPC APEX EXPO this year. I caught up with Gary and asked him to fill us in on the creation of the Designers Council, and some of the changes he’s seen in the last 24 years.

Electrical Design Challenges for Automotive PCBs

A recent article in this magazine by Monica Andrei of Continental Automotive Systems emphasized the systemic nature of an automobile and discussed the characteristics and adoption of software design tools to enable such system-level design. Recognizing that electrical challenges are part of the automotive system-level discussion, this article will present more detail on signal integrity. Future discussion is planned regarding EMI, power integrity, and thermal integrity.

McCurdy: How to Build a Successful IPC Designers Council Chapter

When Scott McCurdy made his transition from PCB fabrication to a PCB layout focus about 13 years ago, he accepted an invitation to attend our local IPC Designer’s Council. Shortly after, he was recruited to serve on the group’s steering committee. At that time, 20–25 people were regularly attending the meetings. When the chapter president moved, he asked Scott to take his place. Now, Orange County chapter meetings often draw close to 100 attendees.

IPC Designers Council: Serving PCB Designers for Almost 25 Years

You may have seen Anne Marie Mulvihill at the Design Forum during IPC APEX EXPO, rounding up speakers with a sarcastic comment or two. As PCB design program manager for IPC, Anne Marie makes the design train run on time. When I told Anne Marie that we were covering the Designers Council for this issue, she jumped at the chance to help us.

IPC Designers Council Viewpoint: Rick Hartley

Rick Hartley has been in involved in PCB design and design education for decades, so it’s no surprise that he started working with the IPC Designers Council early on. Now retired from his day job at L-3, Rick still teaches PCB design and shows no sign of slowing down. I asked him to discuss his work with the Designers Council, and what the group means to the design community.

IPC: Connecting Electronics Industries

John Mitchell, president and CEO of IPC—Association Connecting Electronics Industries, provides the basic overview of the association—its goals and basic mission, activities, and how it best serves its membership. He also provides a snapshot of how IPC promotes technology development in the industry through standardization.

Rogers Scales up Production and Integrates Arlon Range

Editor Pete Starkey interviews Rogers European Sales Manager John Hendricks at productronica 2015. Hendricks updates us on Rogers’ acquisition of Arlon, and explains how the Arlon products are complementary to Rogers’ existing materials.

EMA: Helping Technologists Manage Disparate Data

Today’s EDA tools are better than ever, but managing design data, from schematics through Gerbers, can be an unwieldly task. I recently interviewed Manny Marcano, president and CEO of EMA Design Automation. He discusses EMA’s approach to managing a variety of types of complex data, the need for seamless data processes, and the future of compliance-aware design.

Orange County IPC Designers Council Meeting Draws Record Crowd

On November 18, the Orange County Chapter of the IPC Designers Council held a “Lunch ‘n’ Learn” event at the Harvard Park Community Center in Irvine, California. Eighty-nine PCB designers and electronics industry professionals gathered to listen to a talk by Chris Heard, a signal integrity engineering consultant at CSH Consulting LLC.

Good In, Good Out: Bay Area Circuits Discusses Data Strategies

A lot of companies talk about the importance of good data management, but for some firms, this amounts to little more than lip service. Then there are companies like fabricator Bay Area Circuits. I recently sat down with Bay Area Circuits President Stephen Garcia and COO Brian Paper to discuss how automating and upgrading their data systems has significantly cut down overall process time, as well as their drive to educate young PCB designers and actively promote the industry to the emerging electronics industry workforce.

Beyond Design: Stackup Planning, Part 4

In this final part of the Stackup Planning series, I will look at 10-plus layer counts. The methodology I have set out in previous columns can be used to construct higher layer-count boards. In general, these boards contain more planes and therefore the issues associated with split power planes can usually be avoided. Also, 10-plus layers require very thin dielectrics in order to reduce the total board thickness. This naturally provides tight coupling between adjacent signal and plane layers reducing crosstalk and electromagnetic emissions.

Polar Instruments Fine-Tunes Layer Stackup Management

Polar Instruments CEO Martyn Gaudion and Technical Editor Pete Starkey discuss Polar’s efforts to simplify specification issues related to the supply chain. Designing PCBs with mixed materials makes layer stackup management more difficult than ever, but Gaudion explains how Polar works closely with materials providers and CAD tool vendors in order to provide users with constantly updated information.

Arlon’s John Wright Discusses New High-Performance Materials

During productronica, European Editor Pete Starkey interviewed Engineering/Quality Manager John Wright of Arlon. They discussed Arlon’s new 85HP ceramic-filled polyimide, as well as a non-woven aramid material, suitable for space applications, that is a drop-in replacement for a similar material discontinued by a competitor in 2006.

The Material Witness: Nonwoven Aramid Reinforcement is Back

In the 1st century AD, there was significant debate among Jewish theologians as to whether resurrection was possible. PCB designers in the early 21st century have had a similar concern about future availability of 85NT nonwoven aramid laminate and prepreg. The stakes may be somewhat less critical, but the future of a wide variety of programs designed around the properties of Thermount have been hanging in the balance.

Flex Circuit Shielding Design Options

Shielding may not be your company’s number one design concern when thinking about your interconnect designs. But if you have to shield circuits for EMI, then you will need to depend on your supplier to assist you with their favorite shielding technique and experience.

Insulectro Hosts Silicon Valley Designers Council Meeting

On October 15, about 25 people gathered for the IPC Designers Council Silicon Valley Chapter meeting at Insulectro's Mountain View facility. Carl Schattke, senior PCB design engineer at Tesla, was the main speaker. His presentation covered a variety of facets of PCB design, from shadowing to the location of component based on weight and surface finishes.

The Challenges of Being Competitive in Automotive Electronics Manufacturing

Simple electronics were gradually introduced into automobiles from the earliest times. At first, these were just simple electro-mechanical devices to make cars work without manual effort, such as to start the engine and keep windshields clear. But in this past decade, we have seen the effects of the gradual growth of issues with electronics systems, with recalls caused by safety issues that cost automotive manufacturers millions of dollars. Electronics within an automotive environment today requires a new approach to ensure a higher level of quality perfection.

The Shaughnessy Report: Car Talk

The automotive electronics segment has exploded. Early cars didn’t have much in the way of electronics. Even in 1950, electronics made up only 1% of a car’s cost. But that figure is expected to hit 35% in 2020, and 50% in 2030. The global automotive electronics market is forecast to hit $314.4 billion by 2020, and that means a whole lot of PCBs.

The Gerber Guide, Chapter 2

Never mirror or flip layers! All layers must be viewed from the top of the PCB, which means that the text must be readable on the top layer and mirrored on the bottom layer. Alas, sometimes, in a mistaken attempt to be helpful, designers flip layers because they must anyway be mirrored on the photoplotter. This could be helpful in a world where the designer's files are used directly in fabrication, but these data layers are actually input for the CAM system.

Jack Pattie Discusses New Ventec Facility

Jack Pattie, CEO of Ventec USA, discusses the company's newest laminate facility, which recently opened in Northern California. He explains how this location, the company's fourth, will help Ventec better serve customers in that region.

Automotive Systems Design: a Support Engineer’s Perspective

In a nutshell, the promise of the system design approach is to allow for hitting the “sweet spot” in terms of functionality, quality and reliability, in the shortest possible design time and with the lowest possible resource investments. In an industry that has a very long time to market (on average around 1,000 days), steadily increasing quality demands and an ever intensifying pressure to lower costs, all these promises become most attractive and compelling.

Failure May Not Be an Option, but Sometimes It's a Reality

I’ve had mechanical engineers question why we are bothering with circuit boards instead of designing the circuitry into the plastic housing of the device. I’ve had manufacturing engineers demand that I shelve the electrical considerations in order to meet manufacturing requirements, and electrical engineers who could care less if the product could actually be built. I’ve had engineers hover over my shoulder watching each and every stroke of the mouse that I make, and others who are never available for important questions which ultimately brought the whole project to a grinding halt.

Failure Mode: Hole Wall Pullaway

This column is based on my experience in test reliability of interconnect stress test (IST) coupons. I am addressing HWPA that features moderate to severe outgassing. There may be HWPA due to thermal stressing of the board without any significant outgassing, but this type of HWPA is subtle, and it presents as a dark line between the plating and the dielectric of the hole wall. This type of HWPA is rarely detected.

Material Witness: Using Scaled Flow Data

Resin systems whose density is not very near 1.35 do not quite fit into the official IPC test method because all the stack weight data used assumes epoxy resin of a standard 1.35 density. Any resin whose density varies from that value requires a new set of calculated weights for various stack-ups in order to provide precise data. This is especially true of filled systems whose resin density now includes a ceramic component as well as the organic resins themselves and may have densities higher than standard.

Beyond Design: Stackup Planning, Part 3

Following on from the first Stackup Planning columns, this month’s Part 3 will look at higher layer-count stackups. The four- and six-layer configurations are not the best choice for high-speed design. In particular, each signal layer should be adjacent to, and closely coupled to, an uninterrupted reference plane, which creates a clear return path and eliminates broadside crosstalk. As the layer count increases, these rules become easier to implement but decisions regarding return current paths become more challenging.

Kelly Dack and Mark Thompson Unite in the War on Failure

There’s been a lot of talk about fighting the war on failure in the PCB industry. But what strategies should our generals follow to prosecute this war? What exactly constitutes a failure in the first place? Is this war even winnable? I recently spoke with longtime designer Kelly Dack and CAM support veteran Mark Thompson of Prototron Circuits about the best battle plans for beating failure, and why designers and manufacturers must team up against this common enemy.

Karel Tavernier: The Gerber Guide

It is possible to fabricate PCBs from the fabrication data sets currently being used—it's being done innumerable times every day. But is it being done in an efficient, reliable, automated and standardized manner? At this moment in time, the honest answer is no, because there is plenty of room for improvement in the way in which PCB fabrication data is currently transferred from design to fabrication.

Nick Barbin: From Designer to EMS Company Owner

Many PCB designers would rather do just about anything than pore over a P&L spreadsheet. But Nick Barbin isn’t a typical designer. He co-founded the design bureau Optimum Design Associates over two decades ago, and the company later expanded into contract manufacturing and Lean processes. In this interview, Nick discussed how he wound up leading an EMS company on the Inc. 5000 list.

Gary Ferrari Shares His Thoughts on PCB Design and More

Recently, I spoke with Gary Ferrari, director of technical support at Firan Technology Group, about numerous topics related to PCB design. Our conversation ranged from CID training to the need for reaching high school students as a way of introducing more young people to career opportunities in our industry. We also covered strategies for helping customers design and build better product, and keeping designers provided with the most critical part of their supply chain—information.

Fast Interconnect: Engineering Services for the Masses

Gary Griffin and Ana Rosique are co-founders of Fast Interconnect, an Arizona-based product engineering company designed to serve an underserved market: the small product developers, inventors, and anyone with an idea for a “cool gadget.” I caught up with Griffin recently to discuss the new company, its innovative business model, and the challenges facing smaller OEMs and product developers.

Avoid Overbuilding your RF Printed Circuit Board

Today, many companies are overbuilding and “overmaterializing” their RF printed circuit boards. In this interview, James Hofer of Accurate Circuit Engineering (ACE) shares some strategies to avoid doing both, which will help lower the total cost of your PCB and improve the overall product quality. Hofer also discusses some of the challenges in the laminate supply chain.

Rigid-Flex PCB Right the First Time--Without Paper Dolls

The biggest problem with designing rigid-flex hybrid PCBs is making sure everything will fold in the right way, while maintaining good flex-circuit stability and lifespan. The next big problem to solve is the conveyance of the design to a fabricator who will clearly understand the design intent and therefore produce exactly what the designer/engineer intended.

The Past, Present, and Future of IPC-A-610

To understand the ultimate power of IPC-A-610, you need to first understand what is at the core of this standard. IPC-A-610 is a collection of visual quality acceptability requirements for electronic assemblies. It is utilized as a post-assembly acceptance standard to ensure that electronic assemblies meet acceptance requirements.

Electronic Design Training Crucial to Industry Growth

In the UK, the electronics industry contributes over £80 billion (approximately US$120 million) to the economy, representing 5.4% of UK GDP, employing over 850,000 people. There is, however, in many countries, a growing concern around labour shortages within the electronics industry, with worries over appropriate workforce skill levels growing.

Broadcom PCB Design: Miniaturization on the Cutting Edge

Editor Andy Shaughnessy recently attended the Orange County Designer's Council “Lunch and Learn” meeting, held at the Broadcom offices on the campus of the University of California, Irvine. Afterward, he sat down with Scott Davis, CID, the senior manager of PC board design at Broadcom, to discuss the company’s savvy PCB design department and their approach to PCB design.

Polar Talks Impedance Control and Insertion Loss Testing

During IPC APEX EXPO, Guest Editor Dan Feinberg sat down with Polar Instruments product specialists Michael Bode and Geoffrey Hazlett to talk about the company and its products and solutions. They also discussed some of the signal integrity technologies being enabled by the company, including controlled impedance and insertion loss testing.

Reliability and Harmonization of Global Standards at Forefront of EIPC Efforts

At IPC APEX EXPO 2015, I-Connect007 Technical Editor Pete Starkey caught up with EIPC's Michael Weinhold and Alun Morgan, who were happy to discuss both recent and ongoing focuses for EIPC, namely, reliability. Also touched on was the importance of the alignment of global standardization processes, especially for Asia.​

Effective Characteristic Impedance

Reflections can occur anytime there is an impedance mismatch on the line. Sources of mismatches are plentiful and include trace width changes, vias, stubs, reference plane changes, and even the so-called fiber weave effect. In this case, a trace can encounter a different dielectric constant depending on whether it is routed over glass or the epoxy resin in the dielectric material. In this investigation by Kirk Fabbri, it is the capacitive contribution of the different components that are of interest, and how they affect the characteristic impedance the driver sees.

Cadence’s Brad Griffin Digs Deep Into DDR

During DesignCon 2015, our roving reporter, Kelly Dack, stopped by to visit with Brad Griffen in the Cadence booth. What follows is their very interesting conversation that revolves around the evolution of DDR.