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Multi Layer PCB Fallout rate

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Ron

#75364

Multi Layer PCB Fallout rate | 17 February, 2016

Does anyone know what the normal fallout rate is for a 12 layer PCB from the board house during testing? We received the inspection data from a recent set of boards. Looking over the report there failure rate looks high to us, but with out knowing what the normal fallout rate is it is hard to tell.

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#75365

Multi Layer PCB Fallout rate | 17 February, 2016

The layer count itself isn't going to be what drives yields. What is the trace/space? How much annular ring for vias did you give them to play with? Class 2 or class 3? What's the worst hole aspect ratio? Controlled impedance? The closer you run to your board House's process limits the worse their yields will be.

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