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The PCB Design Magazine, September 2014

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The PCB Design Magazine, September 2014 September 2014 IPC-2581 Adoption Update by Hermant Shah & Ed Acheson p.24 What’s New in ODB++? by Julian Coates p.34 IPC-2581B Eases Stackup Development by Amit Bahl p.42 September 2014 • The PCB Design Magazine 1 Upcoming Events September 23–25 November 18–20 electronica & productronica India 2014 High-Reliability Cleaning and IPC India Conference & Workshops Conformal Coating Conference Bangalore, India Sponsored by IPC and SMTA Schaumburg, IL, USA September 28–October 2 IPC Fall Standards Development November 20 Committee Meetings Assembly & Reliability Conference Co-located with SMTA International Bangkok, Thailand Rosemont, IL, USA December 3–5 October 14–15 International Printed Circuit and IPC Europe High Reliability Forum APEX South China Fair Düsseldorf, Germany (HKPCA and IPC Show) Shenzhen, China October 28–30 IPC TechSummitTM February 24–26, 2015 Reliability. Innovation. Leadership. IPC APEX EXPO® Sponsored by: CALCE and Lockheed Martin Conference & Exhibition 2015 Raleigh, NC, USA San Diego, CA, USA More Information www.ipc.org/events Questions? Contact IPC registration staff at [email protected] or +1 847-597-2861. September 2014 This Issue: DATA FORMATS FEATURED CONTENT The great data transfer format debate continues. This issue features an ODB++ update by Julian Coates, and the latest information on IPC-2581 by Hemant Shah and Amit Bahl. Plus, Coates and Karel Tavernier engage in a candid back-and-forth discussion about ODB++ vs. Gerber. 12 The Great Gerber vs. 34 What’s New in ODB++ Debate ODB++? by Julian Coates 24 IPC-2581 Adoption Update by Hemant Shah and Ed Acheson FEATURE COLUMN 42 IPC-2581B Eases Stackup Development by Amit Bahl 4 The PCB Design Magazine • September 2014 SePTeMBer 2014 THe OPTIMuM vOluMe 3 TM MAGAzIne nuMBer 9 DedicateD TO thepcbdesignmagazine.com PCB DeSIGn CONTENTS ARTICLE VIDEO INTERVIEWS 50 HDI PWB Reliability 33 Teradyne Shares View of by Paul Reid High-Growth Market Overseas PANEL DISCUSSION VIDEO 58 The Great File Format Transfer Debate COLUMNS 8 The Survey Said: A Third of Designers Near Retirement Age by Andy Shaughnessy 46 A PCB Potpourri by Bob Tarzwell & Dan Beaulieu SHORT 39 New X-ray Imaging Allows Monitoring of Treatment 58 Scientists Develop Thinnest-Possible Semiconductor NEWS HIGHLIGHTS 40 PCB007 EXTRAS 56 Mil/Aero007 62 Events Calendar 60 PCBDesign007 63 Advertiser Index & Masthead 6 The PCB Design Magazine • September 2014 column THE SHAUGHNESSY REPORT The Survey Said: A Third of Designers Near Retirement Age by Andy Shaughnessy I-COnneCT007 One of the best parts of this job is keeping in Question 1: What is your approximate age? touch with PCB designers. You all are an interest- ing bunch of people, to say the least, and I enjoy I more or less expected this sort of age distri- hearing your stories, concerns, complaints, ob- bution, but it’s still jarring to see it graphically. servations about the industry, and whatever else As you can see from Figure 1, over half of the you want to share. respondents are 51 and over, and 1/3 of readers I meet with some of you in person at trade are 56 and over. The single biggest chunk of de- shows during the year. But in between shows, a signers is 61 and over. Not a good thing for the quick survey is a great way to get a snapshot of future. How can we draw more young people what you all are going through at the moment. into this industry? In July, we sent subscribers a three-question survey. We’ve noticed that surveys with too Question 2: What are some of the challenging many questions often go unanswered. You’re technologies you work with on a daily basis? too busy to fill out a 50-question survey at work, (e.g., HDI, DDR3, differential signaling, high so you forward it to your home e-mail address layer-count, etc.) to look at later. Then you get distracted, right- fully so, by spouses, kids and grandkids. You just Here is a short sampling of the more com- don’t have much free time. mon answers, slightly edited for clarity: But you seem to have time to answer three questions. We had a solid response rate, espe- • High-frequency PCB design. cially considering it was the middle of summer. • RF, DDR3. The replies are all over the place, particularly • The shrinking size of components! when we asked about technology. • Diff pairs. Figure 1: The “age pyramid” for PCB designers. Who will design boards in the future? 8 The PCB Design Magazine • September 2014 the shaughnessy report THE SURVEY SAID: A THIRD OF DESIGNERS NEAR RETIREMENT AGE continues • DDR2, SERDES differential signaling. main reason that I still do this kind of work. • High-voltage isolation, DDR3, SERDES length Also, PCB layout designing is like playing Tetris matching, low-noise design, power/ground and all day! PDN design. • Parts placement is actually a fun puzzle. • The majority of the PCBs I deal with are • Working on new technologies for a great very plain 2-layer boards. My specialty is not in company, with occasional travel. high complexity, but how to provide beautiful • Upcoming retirement in less than 18 boards at a price so low ordering becomes some- months. thing you don’t think about. Most of my repeat • With exception of our manager, no one is an customers don’t bother asking for quotes any expert in everything and everyone seems to chip more. I guess the most demanding “technology” in their part, which makes it all come together. for me is not actually technology, but language. • The design process itself, plus great co- The fabs I source from don’t speak English, so workers. it really puts my Chinese language skills to the • The best part is working on international test. projects and creating sophisticated layout with • Fine-pitch BGA, HDI, filled via-in-pad, high high-end tools. temperature (175°C), thermal management. • Made a living doing this since for the last • HDMI DDR3 differential signaling, high 36 years and enjoy doing it. Moonlight on the signaling (14G) 16 to 20 layers. side doing it for former contacts. However, I do • 100Gbps channels, embedded actives. look forward to retirement down the road. • HDI, DDRx, extreme copper weight, RF, • Having the knowledge, gained by years of thermal dissipation, .3mm-.4mm parts, ultra- experience, to look at design proposal and see low-noise circuits, 60-100 amp switching power several ways it could be done. Being allowed the supplies, planar core transformers, inductors, opportunity to build “designer confidence” by EMI-EMP, rigid and flex, medical and aerospace. attending trade shows, reading tech articles and • HDI, high speed, lack of industry knowl- networking in turn allows me to build the confi- edge of customers. dence of a design team in my abilities is the best • The challenges here all have to do with part of my job. high power. So, voltage clearance, high current, • I have a lot to learn yet! heat issues, etc. • Sitting by a window and drinking coffee. • High layer count. The challenges here are all to do with high power. So voltage clearance, There you have it. You all love your work, high current, heat issues, etc. and you enjoy collaborating with your co-work- • DDR4, rigid-flex, FPGA-PCB pin swapping. ers. And I bet most of you enjoy sitting by a win- dow and drinking coffee as much as that witty Question 3. What is the best part of your job? respondent. Whether it’s the design process itself, your But we’re in danger of losing a big group of great co-workers, your upcoming retirement, designers over the next decade or so. What can or something else, let us know! we do about the graying of our industry? • Generating end-products for use in space This column appeared in the Inside Design applications. Newsletter in August. PCBDESIGN • The design process. As a service bureau, ev- ery job is different, with its own unique prob- Andy Shaughnessy is manag- lems to resolve. ing editor of The PCB Design • The beach house it pays for. Magazine. He has been cover- • Working with a great bunch of people. ing PCB design for 15 years. • Being paid to do puzzles all day. He can be reached by clicking • Learning new stuff. here. • Our working environment would be the 10 The PCB Design Magazine • September 2014 feature The Great Gerber vs. ODB++ Debate Editor’s Note: This friendly debate (mostly for CAD-to-CAM data transfer without any friendly!) began with an article by Mentor Graphi- downsides. cs’ Julian Coates, which ran in the February issue In order to promote ODB++, Coates unfor- of The PCB Magazine. Karel Tavernier, managing tunately reverts to Gerber-bashing rather than director of Ucamco, which owns the Gerber format, explaining the strengths of ODB++. And his replied to that article, and Coates was given the arguments are highly misleading, as they are courtesy of a rebuttal so that they could be publi- based on some tired old fallacies that I would shed side-by-side in the same issue. Finally, Taver- like to address here. Before starting, though, nier replied to Coates, getting the last word...for it’s important to clarify that when referring to now, at least. Gerber, I mean RS-274X Extended Gerber, the current Gerber format. This supersedes the ear- lier RS-274-D Standard Gerber format, which is Gerber— obsolete. Bashing RS-274-D Standard Gerber is the Smartest Way Forward like railing against Windows because MS-DOS only allowed eight-character file names. If Coa- by Karel Tavernier tes wants to bash RS-274-D, I’ll gladly join him.
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