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4 DESIGN007 MAGAZINE I NOVEMBER 2020 FEATURES: Stephen Chavez and Happy Holden on Designing Reliable Vias Interview with Stephen Chavez HDI Design, Landless Vias, VeCS, and More Interview with James Hofer Stacked Microvia/Weak Interface Reliability Study Edited by Happy Holden FEATURE COLUMNS: PCB Vias, 'You Have a Go' by Tim Haag The Fundamentals of Via Design by Mark Thompson NOVEMBER 2020 • FEATURE CONTENTS There has been quite a bit of activity in the world of vias, especially microvias. Military contrac- tors have been experiencing microvia failures that occur during reflow but remain undetectable at room temperature. A failure that you can't detect is never a good thing, especially if you're building PCBs for missiles or fighter planes. The Via Issue 12 26 38 34 60 38 12 34

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