I have both seen and heard much of this problem.
While material compatibility is one factor, some
basic factors (not a complete list, I'm sure) are
whether the paint is stirred/agitated fully, surface
prep, and temp/humidity of environment.

More and more manufacturers are using selective 
electroless plating (some major cell phone manufacturers
included. It's cost effective in volume, offers
excellent adhesion (read as longevity), has better
abrasion resistance properties, application thickness
is uniform (no 'line-of-sight' issues as with
spray or vacuum metallization) and conductivity
is high.

John Juhasz
Fiber Options
Bohemia, NY


> -----Original Message-----
> From: Darrell Locke [SMTP:[email protected]]
> Sent: Friday, January 11, 2002 10:24 AM
> To:   [email protected]
> Subject:      Spray-on Conductive Coatings
> 
> 
> Dear Colleages,
> 
> We have seen an issue lately with spray-on conductive coatings used on the
> inside of electronic enclosures.  The coating works great for EMC, but
> there
> seems to be a problem with adhesion and tiny flakes of conductive material
> getting in the electronics.  I'm thinking that the spray-on type materials
> should not be used at all.  Has anyone else experienced this problem?  
> 
> Thanks
> 
> Darrell Locke
> Advanced Input Devices
> Coeur d'Alene ID
> 
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