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Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 30 Mar 1998 13:05:56 -0500 |
Content-Type: | text/plain |
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Mr. Brucker,
I'd attach your TechNet reply, but errantly zapped it this morning
while scanning the Net. I did read it though, and you bring up good
points about inspection criteria. We routinely perform a physical
destructive analysis (DPA) of production boards, and I have cross
sectioned many of these joints. My own experience is that they've been
troublefree, and certainly achieve compliant heel and side fillets.
Toe fillets are not a requirement for gullwing leads because the
common presence of exposed copper from the shearing process, and
occasionally the permissible toe overhang, can make those fillets very
difficult to achieve. I see a request on the Net for info on palladium
finished boards; I've not run into them yet. That could be a blessing.
Bruce Tostevin
Benchmark Electronics
Hudson, NH
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