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All soldermasks lose adhesion after a wave profile. If you have a 20%
loss, check all processes for loss of temperature control. It could
also be a supplier issue with dirty panels prior to mask application.
______________________________ Reply Separator _________________________________
Subject: Soldermask peeling
Author: [log in to unmask] at internet
Date: 12/9/96 8:36 AM
We recently experienced soldermask peeling after wave from
three different Fabricators all within 2 weeks. Subsequently
we took sample lots of each Fabricator and performed a
pre-wave and post-wave tape test. In all lots the boards
passed pre-wave tape test but had a 10-25% failure post wave.
What can cause this phenomena? Does the weather change have
anything to do with soldermask application and durability?
Dan Hickey
Senior Buyer
Vicor
[log in to unmask]
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