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FROM: James D. Herard
**************************************************************
Subject: fab: Solderability
Ref: Solderability
I caution against too many hasl cycles. Besides the fact that
the board will begin to look less pleasant (brown/burned),
each thermal cycle does reduce the life, and most boards
are not intended for more than a certain number of solder
cycles in their entire life time, including reworks.
We perform a similar screen and look test. I'd recommend you
perform some microsections to look grain structure and
intermetalics.
if in extreme doubt, I'd recommend you solder a board up and
put it on thermal cycling test or HAST.
Good Luck
Jim
James Herard x77026 KBLE/014-3 Quality Engineer
***************************************************************
********* Get it While you Can *********************
***************************************************************
*** Forwarding note from SMTP4 --IINUS1 10/10/96 19:38 ***
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