Electronics > PCB/EDA/CAD

Yet another Pb free Failure Mode in PCBs

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HLA-27b:
Just found this very detailed paper

http://www.smtnet.com/library/files/upload/Reliability_and_Failure_Mechanisms.pdf

Apparently small vias can crack during high temperature reflow  associated with lead free processes.
Here is a picture worth 1000 words:

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