8 Aug
2008
8 Aug
'08
8:55 p.m.
From: bfranchuk at jetnet.ab.ca
Roy J. Tellason wrote:
Hi
The only use I saw for the flat packs was while I was in the
service. The boards had multiple layers and the leads went
directly into the layers. In otherwords they were not surface
mounted. The boards didn't have vias to connect layers. It
was all chip to chip. There was a hole through the board layers for
each flat pack.
Reworking failed boards was a challenge because one had to
unsolder and peel the layers back from the IC with conformal
coat on every thing.
Dwight
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There were also those "flatpacks" which
I never could figure out. A precursor
to surface mount? Something else?
I would guess so, but I've never seen a flat pack in the flesh myself so
I can't
say.