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The PCB Design Magazine • February 2013 Test & Meaasuurer Meent Storage Test & Meaasuurer ment Storage Teelel coom I-Speed MiM lilitataryy Innfrfrasastrruucctuure Baackckplanne Servers The Next Generation High Speed Product from Isola • Global constructions available in all regions • Offer spread and square weave glass styles (1035, 1067, • Optimized constructions to improve lead free 1078, 1086, 3313) for laminates and prepregs – performance Minimizes micro-Dk effects of glass fabrics – Enables the glass to absorb resin better and • I-Speed delivers 15-20% lower insertion loss over enhances CAF capabilities competitive products through reduced copper – Improves yields at laser and mechanical drilling roughness and dielectric loss • A low Df product with a low cost of ownership • Improved Z-axis CTE 2.70% • I-Speed – IPC 4101 Rev. C /21 /24 /121 /124 /129 Effective Loss @ 4 GHz on a 32 inch line Magnitude [S], [db] A: I-Speed B: Mid - Df 1.3 -10 4 4 4 4 -20 -30 Magnitude [S], [db] A: I-Speed B: Mid - Df -2.5 Loss (dB) Length (mm) Length (in) Loss (dB/mm) Loss (dB/inch) -5 I-Speed -11.43 800 31.496 -0.014 -0.363 Mid-Df -13.55 800 31.496 -0.017 -0.430 15.65% -7.5 -10 -11.43 < 4 -12.5 -13.55 < 4 -15 -17.5 I-Speed delivers 15-20% lower insertion loss over competitive low Df products. http://www.isola-group.com/products/i-speed The data, while believed to be accurate and based on analytical methods considered to be reliable, is for information purposes only. Any sales of these materials will be governed by the terms and conditions of the agreement under which they are sold. Isola Group S.a.r.l. 3100 West Ray Rd., Suite 301, Chandler, AZ 85226 1-480-893-6527 The base for innovation http://www.isola-group.com February 2013 THIS ISSUE: SIMULATION & ANALYSIS FEATURED CONTENT Do you run simulation on your PCB designs? Circuit boards have grown increasingly faster and more complex, yet simulation is still not standard procedure, even with high-technology de- signs. This month, our veteran contributors discuss a variety of simulation techniques that can help you save time and avoid costly re-spins. 10 Measuring Correlation 54 High-Speed Boards Need to 50 GHz and Beyond Automated Checking by Yuriy Shlepnev by Mike Steinberger 28 Postmortem Simulation by Barry Olney FEATURE COLUMN 36 Efficient Simulation Using High-Frequency Printed Circuit Materials by John Coonrod 4 The PCB Design Magazine • February 2013 Test & Meaasuurer meent Storage Teelel coom ® I-Tera MTMMililitataryy Innfrfrasastrruucctuturre Baackckplanne Servers The Next Generation Very Low Loss Product from Isola • Tg - 200°C • Superior processing performance over competitive products • Td - 360°C • I-Tera MT processing attributes: • Low CTE in the Z-axis 2.8% (50 to 260°C) – 30% greater press productivity over competitive products • Dk range = 3.00 to 3.45 – Better drilling performance over competitive products, no ceramic filler used • Df range 0.0030 to 0.0036 – No plasma desmear required • Utilizes standard E-glass • Exhibited good filling of vias vs. competitive products • I-Tera MT prepreg standard FR-4 storage conditions apply • Global availability with standard constructions • UL Qualified - 130 MOT • Square-weave styles available: 1035, 1067, 1078, 1086, 3313 I-Tera MT Dk - 3.00 and Dk - 3.45 vs. Comeptitive Product 12” Micrstrip T-Lines - dB/Inch I-Tera MT Dk - 3.00 I-Tera MT Dk 3.45 Comeptitive 30 mil 30 mil Product I-Tera MT shows a 15% improvement in impedance over the competitive product. http://www.isola-group.com/products/i-tera The data, while believed to be accurate and based on analytical methods considered to be reliable, is for information purposes only. Any sales of these materials will be governed by the terms and conditions of the agreement under which they are sold. Isola Group S.a.r.l. 3100 West Ray Rd., Suite 301, Chandler, AZ 85226 1-480-893-6527 The base for innovation http://www.isola-group.com FeBruary 2013 The oPTiMuM voluMe 2 TM Magazine nuMBer 2 DeDiCaTeD To thepcbdesignmagazine.com PCB Design CONTENTS SPECIAL SECTION COLUMNS 40 IPC APEX EXPO 2013 8 To Simulate or Pre-Show Coverage Not to Simulate? by Andy Shaughnessy 22 PCB Design Data: What Do Your Customers Expect? by Jack Olson 64 Do Not Measure PDN Noise Across Capacitors! ARTICLE by Istvan Novak 70 Is the Cloud a New Paradigm for Electronic Design? 76 Adhesive Delamination by Dr. Raul Camposano by Paul Reid and Steven McKinney SHORTS 9 IPC: December 2012 Shipments, Bookings Down VIDEO INTERVIEWS 21 Simberian: High-End Simulation 27 2013 Design Vision Award Winners For Designers Recognize Innovation 27 Cadence Integrates 63 Nanowires Could Lead to More Sigrity Capabilities Efficient, Cheaper Solar Cells 68 Modeling High-Speed 80 IPC Sees Bright Future for Structures: The Doctor is In Latin American Industry 74 Twenty-Five Years of Simulation Stimulation TOP TEN MOST-READ NEWS 35 PCB007 EXTRAS 63 Mil/Aero007 84 Events Calendar 82 PCBDesign007 85 Advertiser Index & Masthead 6 The PCB Design Magazine • February 2013 column THE SHAUGHNESSY REPORT To Simulate or Not to Simulate? by Andy Shaughnessy i-ConneCT007 Years ago, very few PCB designs went So Ansoft was acquired by ANSYS, HyperL- through any type of simulation process. And ynx and Zeland are now part of Mentor Graph- that was just fine. Most designs were simple ics, and Sigrity was purchased by Cadence last enough; they didn’t need to be simulated. year. Only Agilent, CST, E-System Design, Sim- But then high-speed design became the rule, berian and SiSoft remain independent. Agilent rather than the may be too big exception. Now to be acquired, designers and but you have to design engineers wonder whether are contending Mentor, Cadence with issues such or Zuken have as ever-increas- their eyes on any ing edge rates, of the other four. transmission They’d all be line reflections, worth acquiring ground bounce, just for the en- and crosstalk, gineering talent not to mention alone. challenges relat- Still, there ed to DDR, PCi seems to be a dis- Express, XAUI, connect; some and SERDES. OEMs just don’t Simulation see any reason to software became run simulation. I a big segment talk with plenty of our industry. of designers who Over the past few don’t simulate decades, we’ve their designs, seen compa- and these guys nies like Ansoft, aren’t designing Agilent, CST, E- yesterday’s tech- System Design, HyperLynx, Sigrity, Simberian, nology. They’re creating some seriously cutting- SiSoft, and Zeland develop PCB simulation and edge, multigig boards. I’ve seen stats showing analysis solutions. that only about half of all PCB designs are simu- These companies used to exhibit at all of lated, and that seems pretty accurate to me. the industry trade shows, from DesignCon to Do you simulate your designs? Send me an MTT/S to PCB West. But over the years, many e-mail and let me know why or why not. This of them have been absorbed by the “big guys.” is definitely a topic worth revisiting. The EDA companies saw plenty of value in the smaller simulation software companies, not Happy Birthday to mention the technical ability behind it. For a Before I sign off, I’d like to offer a few birth- comparatively small amount of money, an EDA day wishes. HyperLynx, Mentor Graphics’ company could dramatically improve its simu- simulation software tool, is celebrating its 25th lation software lineup. birthday this year. The company HyperLynx 8 The PCB Design Magazine • February 2013 the shaughnessy report TO simulate OR NOT TO simulate? continues was founded in 1988, aiming to bring high- and still loved by many users, since its intro- speed design tools to the then-nascent PC duction in 1994. Intercept now offers solutions world. The first HyperLynx tool was LineSim, for RF and hybrid design, as well as schematic followed by BoardSim and the EMC analysis and library management tools. tool SpectralSim. HyperLynx stayed involved We always hear that our industry is static, in the industry, and management co-founded that PCB designers and design engineers are the IBIS Open Forum in 1993. In 1997, HyperL- afraid of change. Well, there might be some ynx was acquired by PADS, which in 2000 was truth to that. After all, most of us are in our 40s purchased by Innoveda. Mentor then acquired and 50s, and it’s only natural that we become Innoveda in 2002. Mentor demonstrated the set in our ways. newest HyperLynx release at DesignCon in But the industry is constantly changing. January. And isn’t that why we enjoy our jobs in the first And Intercept Technology is turning 30 place? PCBDESIGN this year. When Intercept started out as an engineering consulting firm in 1983, founder Steve Klare had no intention of running an andy shaughnessy is manag- EDA software company. But after a decade of ing editor of The PCB Design dealing with the challenges related to the CAE Magazine. he has been cover- and CAD software of the time, Intercept began ing PCB design for 13 years. developing its own EDA tools. The company he can be reached by clicking recently redesigned the GUI of its Pantheon here. design suite, which had remained unchanged, For rigid PCBs and flexible circuits combined, IPC: December 2012 Shipments, industry shipments in December 2012 were down Bookings Down 14.5% and bookings decreased 7.5%, compared to December 2011. year to date, combined indus- iPC has announced the December findings from try shipments were down 5.2% and bookings were its monthly north american Printed Circuit Board down 2.4%.
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