What type of components is this happening around?

-----Original Message-----
From: Lance Mayes [mailto:[log in to unmask]]
Sent: Wednesday, June 09, 2004 6:18 PM
To: [log in to unmask]
Subject: [TN] Conformal Coating
Importance: High

Hello again Techies;

We are having issues with our conformal coating on some of our components.
 It pulls back from some of the components leads along the edges.
We are wondering if this will make a difference in the protection of the
board.
We're using Humiseal Acrylic 1B31 and Humiseal Thinner 521 in a mixture.
The conformal machine sprays a nice coating and then the coating starts to
recede.  Sometimes this happens even when we paint the acrylic manually.
Has anyone else ran into this problem, and what to do to overcome it?

This is a good one for the end of the day.  I'll be waiting.

Thanks again


                        P.  Lance Mayes

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                        Mfg. Trainer

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