"Niche technologies are very important for any fabricator to adopt in order to obtain expertise in the marketplace and to provide more service and value to its customer base.” – Michael Carano, OMG Electronic Chemicals
Toward a PCB Production Floor Metric for Go/No Go Testing of Lossy High-Speed Transmission Lines As designers strive to extract ever more performance from high-speed
transmission lines on FR-4 substrates and their high-speed derivatives,
a requirement has arisen for a practical and robust “Go/No Go” test
technique for loss to be deployed on the PCB production floor. The
intent of this paper is to propose that root impulse energy (RIE)
testing is a practical and achievable test method. It is easily
deployed and offers repeatable, reliable discrimination between PCBs
fabricated with a range of varying base material loss characteristics.
by Brandon Gore, Richard Mellitz, Jeff Loyer, Martyn Gaudion, Jean Burnikell, andPaul Carré
Considering Design Variants to Maximize Process Efficiency In today’s product environment, many products compose families of similar base-capability devices with increased feature sets defining several different products. For example, a base-capability MP3 player may be available in a family featuring, say, 4 GB, 8 GB, or 12 GB of memory, each with a different model number.
Intelligent Design: An Update on the Effects of Laminate Weave on Jitter and Skew in Gigabit and Higher Signals In my April 2007 column I reported on the effects of laminate weaves on the quality of gigabit per second and higher signals. There had been several reports of laminate weave causing system failures due to the lack of uniform distribution of glass in the woven reinforcements used to manufacture laminates and prepregs. The failures were jitter and skew in differential pairs.
by LeeRitchey
My Line: Say Goodnight, Gracie By this time perhaps many of you have learned that I am leaving CircuiTree. My tenure with the magazine may have been abbreviated, but I am still reeling from all the things that took place over the past 18 months.
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