Maurice Dore * wrote:
> 
> I have a mixed technology board - bottom side smt  power supply which is
> failing. I suspect that the failure is due to the unreliability of
> decoupling ceramic caps.
> On reworking the caps they tend to crack.
> I have subjected them to thermal shock tests and they seem to retain their
>  integrity.
> Any suggestions? Is it a vendor problem (which seems unlikely) only?
> Thanks in advance.
> 

Maurice,

Are the leads of the cap bent in any way outward 
to mount them on the board?  I've had that happen. 
What appeared to be a subtle bending turned into a 
crack when put through soldering.

Doug

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