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1996

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Subject:
RE: Soldermask peeling
From:
"Nelson, John" <[log in to unmask]>
Date:
Mon, 09 Dec 96 09:00:00 EST
Content-Type:
text/plain
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text/plain (60 lines) 

Dan,  you didn't mention if you bake before use.  I suggest you have a   
sample of each batch baked for at
2-4 hours at 220(F just before wave solder and re-test.  You may have a   
moisture problem.

 ----------
From:  [log in to unmask][SMTP:[log in to unmask]]
Sent:  Monday, December 09, 1996 7:41 AM
To:  [log in to unmask]
Subject:  Soldermask peeling

       

     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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