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| Date: | Wed, 31 Jan 96 12:49: 3 est |
| Content-Type: | text/plain |
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Simple Question:
Has anybody found a functional defect in multilayer pwb's due to
nailheading???
D.Rooke
([log in to unmask])
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Answer - Yes, both after HAL in PWB form and after soldering (wave and IR
reflow) in PWA form. Nailheading was significant in all cases but it could
not be determined if failure was caused by thermal stress alone or if
outgassing contributed.
BOB SMITH
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