I should have provided more details.

     I am coating water-washed boards. Right after application of the
     acrylic coating, the material wicks off the tops of resistors and
     capacitors.

     The material also pulls away from the edges of IC packages. I know
     that it does not have to cover the edges, but we still have to go back
     and touch up the boards.

     I will try cleaning the boards in IPA and see ifthat helps, but I am
     still curious if other folk have the same problem.


______________________________ Reply Separator _________________________________
Subject: RE: [TN] Confomal coating adhesion
Author:  <[log in to unmask]> at internet
Date:    10/12/98 3:30 PM


I have been informed that several fine coats rather than one
thicker coat improves adhesion, however, I have no practical
experience of it to back this up. Might be worth a try, but it
will increase your process time. And yes, cleanliness is an
issue. i suggest you approach your supplier.........Bridget


> -----Original Message-----
> From: Paul Stolar [SMTP:[log in to unmask]]
> Sent: 12 October 1998 15:09
> To:   [log in to unmask]
> Subject:      [TN] Confomal coating adhesion
>
>                    *** WARNING ***
>
> This mail has originated outside your organization,
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>      Keep this in mind if you answer this message.
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>
>      Does anyone have any good experience at improving
> conformal coating
>      adhesion to plastic packaging?
>
>      Is it a cleanliness issue, or is it inherent in materials?
>
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