Greetings to all. We are currently experiencing cracking of the ceramic
capacitors, on both primary and secondary sides of the PWB. The cracks do
not appear to alter the electrical properties (PWBs pass in circuit
testing), but we are concerned with long term reliability. Thermal
profiling of all processes, and copying same in defect lab, has not
reproduced the defect! The cracking appears randomly, and is spread across
several vendors. Any helpful suggestions out there? Thanx for your time.

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