What types of failures are you seeing?  Can you tell me how the parts
perform (open, short, flakey)?  What other types of components are on the
circuit assembly (TTL, microcontrollers, etc.)?

I've never observed "big, strong" parts like these to be particularly
susceptible to mis-handling and electro-static problems.  Both of these
parts are designed for currents in excess of 1 Amp, which usually buys some
immunity to casual handling, compared to small signal MOSFETS and
microcontroller inputs/outputs.

Can you tell us more about the nature of the failures?


Thanks,


Carl Van Wormer
Cipher Systems
1815 NW 169th Place, Suite 5010
Beaverton, OR  97006
Phone (503)-617-7447    Fax (503)-617-6550

-----Original Message-----
From: Eric Laroche [mailto:[log in to unmask]]
Sent: Thursday, September 04, 2003 6:26 AM



Good morning to all,



We are experiencing difficulties with two particular components.  One is a
surface mount voltage regulator (7805) and the other is a thru-hole double
diode (MBR20100 in a To-220 package).  Is it possible that these components
are sensitive to static, explaining why the problem is isolated to these
components or could it be the thermal profile of the wave that would affect
these particular parts?



We have never come across this type of problem before.  I am perplexed
because if our process was at cause, wouldn't more components be affected?



Thanks to all



Eric Laroche

General Manager








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