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July 1997

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Subject:
RE: Temporary Spot Solder Mask
From:
"Yuen, Mike" <[log in to unmask]>
Date:
Wed, 23 Jul 97 12:10:00 CDT
Content-Type:
text/plain
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text/plain (58 lines) 

Many solder suppliers also offer temporary solder mask. The problems you can 
expect from some of these masks are:
     - Adhesion problem at high temperature
     - Compatibility with the wave flux you use
     - Printability issues (if screen print)
     - Residue  left on pads after removal
     - Compatibility with your wash equipment (if water soluble)
     - Cure time
     - Fracture druing thermal cycle (Thickness dependent)

Internet is a very good sources to start your search.

Hope this helps,
Michael Yuen

 ----------
From: TechNet-request
To: TechNet
Subject: Temporary Spot Solder Mask
Date: Wednesday, July 23, 1997 11:30AM

We are currently testing and looking at a latex peelable, a water-soluble,
a UV peelable, and a UV water-soluble.

I was wondering what type of temporary spot solder mask was out there and
what type are companies using and why?

 I would also like to know  if there were any problem that occured with the
spot mask during the wave or cleaning process ?


Thank you,

Benjamin Lee


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