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December 2007

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Subject:
From:
"Douglas O. Pauls" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 20 Dec 2007 10:29:43 -0600
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Sue,
We do Parylene on a number of assemblies.  One of our rework methods is to 
use media blasting.  Take a look at the Swamblaster from Crystal Mark.  It 
is an ESD safe system.  We use wheat starch pellets (a standard media from 
Crystal Mark).  It is not a particularly fast system, but it does work 
well and the softness of the media means that you can remove the Parylene 
without damaging the solder mask or part markings.  If you go the route of 
the slightly harder sodium bicarbonate pellets, it works faster but you 
can damage the solder mask real easy if you are not vewy vewy careful.

Doug Pauls
Rockwell Collins




Sue Powers-Hartman <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
12/20/2007 09:48 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Sue Powers-Hartman <[log in to unmask]>


To
[log in to unmask]
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Subject
[TN] Parylene Coating Removal






What is the best way to remove parylene coating?  Right now the operators 
are scraping the coating off the joint enough to allow access with a 
solder 
iron. We would like to find a better way.

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