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From [log in to unmask] Tue Jan 14 16: |
17:37 1997 |
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Tom, give me a call or a private e-mail if you want to discuss this.
Scott Bryan
Zycon Corp
[log in to unmask]
______________________________ Reply Separator _________________________________
Subject: RE: Dry Film Soldermask
Author: [log in to unmask] at corp
Date: 1/13/97 3:01 PM
There is an inherent difference between LPI and dry film
soldermask, in that dry film mask is three-dimensional. LPI
mask floods the board, whereas dry film leaves triangulated
pockets along the edge of surface features. It is these
pockets where solution entrapment occurs. This is why the
cleanliness numbers aren't as good with dry film mask.
Tom Coyle
Field Services Engineer
HADCO Corporation
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