Latest Articles

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.

In Medical PCB Design, Innovation Never Stops

Medical electronics is an exciting field to be working in right now with new ideas coming online almost daily. We last interviewed medical PCB designer Kenneth MacCallum in 2015. Recently, I asked him to give us an update on trends he sees in medical electronics, and some of the challenges in adapting the latest technology to this segment of the industry.

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.

Calculation of Frequency-Dependent Effective Roughness Dielectric Parameters for Copper Foil Using Equivalent Capacitance Models

Knowledge of the correct parameters of laminate PCB dielectrics refined from any copper foil roughness impact and the proper foil roughness characterization are important constituents of modeling high-speed digital electronics designs.

Randy Burcham Discusses New Techniques for BOM, Daughterboards

During AltiumLive, I spoke with IOTA Engineering's Randy Burcham, who taught several classes during the event. He explained his methodology for filtering BOM data as well as his new approach to working with daughterboards and how he was up and running on Altium tools after only three days.

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!

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.

Embedded Inductors with Laser Machined Gap

The power magnetics are often the largest and most expensive devices in the circuit. Integrating them into either a power converter module or system board can significantly reduce size and cost of the power converter function. This work presents the fabrication of embedded inductors and the experimental laser machining of gaps in the underlying ferrite structure.

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.

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).

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.

Words of Advice: Fabricator Feedback?

In a recent Design007 Survey, we asked the following question: What is the most important feedback that you receive after your board is manufactured? Here are just a few of the answers, edited slightly for clarity.

New Grad Designs PCBs for Smart Baby Beds

The best ideas in the electronics industry improve the quality of our lives. At AltiumLive, I ran into Tamara Jovanovic, a new PCB designer and junior electrical engineer with Happiest Baby, a Los Angeles-based company that makes smart beds that can protect babies from crib death. After joking that I save the world from dangling participles while she’s saving babies, I asked Tamara to tell us more about smart baby beds, and how she got into PCB design in the first place.

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.

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.

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.

Stephen Chavez: Breaking the Design Data Bottleneck

When we started planning this issue on design data, I knew we’d have to speak with PCB designer and EPTAC design instructor Steph Chavez. In this interview, he explains some of the biggest issues related to good design data handoff, and he offers some ways forward.

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

Life Beyond 10 Gbps: Localize or Fail!

Ideally, all interconnects should look like uniform transmission lines (or wave-guiding structures) with the specified characteristic impedance. In reality, an interconnect link is typically composed of transmission lines of different types (microstrip, strip, coplanar, coaxial, etc.) and transitions between them such as vias, connectors, breakouts and so on. Transmission lines may be coupled to each other that cause crosstalk. The transitions may reflect and radiate energy due to discontinuities in signal and reference conductors. The crosstalk, reflections and radiation cause unwanted and sometime unpredictable signal degradation.

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.

ESD Alliance Advisory Council to Shape ES Design West at SEMICON West

The Electronic System Design Alliance, a SEMI Strategic Association Partner, today hosted the first meeting of the Advisory Council of ES Design West co-located with SEMICON West 2019 West at San Francisco’s Moscone Center, July 9-11, 2019.

Julie Ellis: Communication and Fabrication Knowledge Critical for Designers

Field Application Engineer Julie Ellis of TTM sees it all: good designs, bad designs, and everything in between. Her classes on proper DFM techniques are always a big draw. She taught at the inaugural AltiumLive in 2017 and was back at this year’s event. I caught up with Julie and asked her to discuss some of the things she covered in class. As she points out, many issues could be eliminated if designers communicated with their fabricators and had a better understanding of how PCBs are manufactured.

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.

PCB Carolina 2018 Draws a Crowd of Technologists

PCB Carolina 2018, the one-day tabletop show based in Raleigh, North Carolina, drew quite a crowd to the McKimmon Conference and Training Center at NC State University on November 7. Show managers Tony Cosentino, Randy Faucette, and Lance Olive (all employees of the Better Boards service bureau) said that this year’s event showed signs of growth compared to the 2017 show, which was also larger than the previous year. They estimated that about 1,000 people attended this year, and they expect another increase in attendance in 2019.

Pulsonix Expands into North America with Version 10 Release

At PCB West in Santa Clara, California, Guest Editor Tim Haag and Publisher Barry Matties sat down with Ty Stephens of Pulsonix on the eve of the software developer's much-anticipated version 10 release date. Stephens outlined many new updates in the upcoming release—which has been in development for over two years—and discussed the company’s desire to break into the highly competitive North American software market.

Strategies to Manage Your China Business Through Turbulence

While the United States may be the world’s most open market, China remains the most competitive, and is still viewed by most U.S. and EU companies as the "last great opportunity for growth.” Many companies want to gain entry to the Chinese market share for their products or services. Thus, the competition for sales of products or services is correspondingly intense. Here's how to succeed in the world's second largest economy.

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.

Cadence Presents New Software System and Technical Papers at PCB West 2018

During PCB West 2018, I spoke with Dan Fernsebner, product marketing group director, and Hemant Shah, product management group director for enterprise PCB products, both with Cadence Design Systems, about their new software launch—DesignTrue DFM Ecosystem. Fernsebner and Shah also address recent technical papers from Cadence on Industry 4.0, IPC-2581, system-level design, and return-path analysis and management.

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.

Book Review: The Printed Circuit Board Designer’s Guide to… Producing the Perfect Data Package

Over the course of his career, Mark Thompson, CID+, engineering support at Prototron Circuits, has evaluated thousands of data packages and delivered numerous talks to designers and engineers about how to create the perfect package. In the spirit of “garbage in, garbage out,” data packages must be perfect to create quality boards. Learn all this and more in The Printed Circuit Designer’s Guide to… Producing the Perfect Data Package!

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.

Darwin E. George: Seeking PCB Design Job at Retirement Age

Some of us dream of living a life of leisure at 70. But not Darwin E. George. This septuagenarian wants to find a job designing PCBs. We met up with Darwin at AltiumLive, where he was networking and trying to get his foot in the door with one of the companies that are hiring now. Darwin told us about his career in PCB design, his experience learning a new EDA tool, and why he would rather design high-speed PCBs instead of playing shuffleboard for the rest of his life.

RTW SMTAI: PalPilot on Adding Value to Design and Assembly

Tim Sullivan, vice president of sales at PalPilot International Corp., speaks with I-Connect007 Managing Editor Nolan Johnson about their services, and how they add value to their customers from design to assembly/manufacturing. He also talks about their online platform called FootPrintKu, which help designers when it comes to footprints of their design.

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.

Mentor and TEXMAC Takaya Team up to Optimize DFT

At SMTAI, Mark Laing of Mentor, a Siemens Business, and Dave Levine of TEXMAC Takaya, sat down with Editor Nolan Johnson to discuss design for test, and their collaboration to improve DFT in PCB design tools and test machinery. They also traced the evolution of DFT over the past decade as it has begun to "left-shift" farther into the realm of the designer, all the way up to schematic entry.

Karl-Heinz Fritz on Cicor’s DenciTec Technology

In a recent interview, Karl-Heinz Fritz, VP of technology at Cicor, discusses the business, DenciTec technology, the impact of tariffs on trade, and applications for 3D printing and additive manufacturing, including potential new opportunities for PCB designers.

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+.

Simon Fried: Additive Manufacturing Through Printed Electronics

Simon Fried, president of Nano Dimension, discusses how the company has taken the additive manufacturing process to the next level through printed electronics. He also shares his thoughts on the growing demand for 3D circuits, as well as how this could potentially be a game-changer for PCB designers.

Cadence: Bullish on AI

David White has been involved with artificial intelligence research for almost 30 years. Now, David is the senior group director of R&D for Cadence Design Systems, and I knew we’d have to speak with him for this issue on AI. In a recent interview, we discussed his decades of work in AI, Cadence’s research into AI and machine learning, and what he believes AI could mean for the EDA tools of the future.

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.

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.

John R. Watson Returns to AltiumLive in San Diego

When AltiumLive launched last year, John R. Watson, CID, of Legrand signed up as an instructor. He’ll be presenting at this week’s AltiumLive in San Diego as well. I spoke with John recently about his AltiumLive class, and the state of PCB design. He also discussed a few tricks for designing boards with components that are currently on an 80-week lead time, and why this problem is likely to get worse before it gets better.

Front-End Expert Mark Thompson of Prototron Circuits Publishes Book on Producing the Perfect Data Package

Errors and inaccuracies slow the process down because the CAM department has to correct their data package or ask customers to clarify their intent. In the quick-turn prototype business where people pay for time, a slowdown on a three-day turn can be a disaster. I recently sat down with Thompson to find out more about his new book and discuss the quest for the perfect data package.

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.

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 West 2018 Draws a Crowd of Designers and Technologists

The I-Connect007 team attended UP Media Group’s PCB West 2018 Conference and Exhibition in Santa Clara, California. I have been attending this event for many years, and every year the show is better than the year before. This year was no exception.

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.
Subscribe | Magazines | RealTime with | JobConnect007 | Education | Webinars
Copyright © I-Connect007 | IPC Publishing Group Inc. All rights reserved. Log in