Mark,

Good question to ask BEFORE you see the coating coming loose.  When we
switched to the no-clean flux, we found that the residue had a significant
effect on the adhesion of our Humiseal 1B31.  We had planned to give all
assemblies a final saponified water clean anyway, and this was enough to
remove the residue so that no coating problems were encountered.  I do
understand that other non-acrylic coatings are not as sensitive.

Ralph Vaughan
Boeing-Atlanta

> ----------
> From:         Mark Pozorski[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;[log in to unmask]
> Sent:         Friday, July 17, 1998 1:03 PM
> To:   [log in to unmask]
> Subject:      [TN] Conformal Coating Adhesion over low res. Fluxes
>
>      Has anyone had experience with conformal coating over a "no-clean"
>      flux residue?   Right now we are using a Humiseal - 1B73 Acrylic,
>      and using a water soluble flux.  We are in the process of going
>      outside with this assembly and most of the contract houses that we
>      have talked with use no clean.    thanks
>
>      Mark
>      ADC Telecom.
>
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