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October 2000

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Subject:
From:
"Stephen R. Gregory" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 25 Oct 2000 11:55:36 EDT
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In a message dated 10/25/2000 9:38:43 AM Central Daylight Time,
[log in to unmask] writes:

> The boards are assembled and then wave soldered using water soluble flux.
The
>  mask begins peeling during water wash in our Trieber SMT Cleaner.
>
>  The wave temperature is 500F. Kester Water soluble flux #2235 is used with
>  Kester #4662 thinner to reach SG. The flux is applied with a foam fluxer.
>  Preheat temperature is 220F.

Hi Richard!

What kind of soldermask is it? LPI or Dry-Film? If dry-film, what brand. Do
you use any sort of chemistry in your cleaner? I've had a few issues with
certain dry-film masks and them being compatible with the chemistry we use...

-Steve Gregory-

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