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March 2000

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Subject:
From:
Pat Kane <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 20 Mar 2000 12:29:27 EST
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Grant

As with any material selection process, proper evaluation must be undertaken
to determine the end result, -  which is a controlled process providing
reliable product to the field.
In the case of NoClean flux and conformal coating, the primary effort should
be focused at insuring compatibility between your flux and the conformal
coating selected.  The flux vendor should be able to provide data showing lab
testing that indicates the types of conformal coating their flux works with
and ones that don't.

As with any flux, OA or NC, a proper reflow profile to fully activate is
critical.  Un-reacted flux will pose a problem with adhesion of conformal
coatings.

Surface cleanliness for incoming bare boards, in process, and prior to
coating should be investigated to determine if you have the best possible
situation for good coating adhesion.
If you would like to discuss these issues offline, please contact me.

Regards,

Pat Kane
Technical Sales Manager
Contamination Studies Laboratories
765-457-8095   office
765-419-2080   cell

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