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May 2005

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Subject:
From:
Chris Ball <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Wed, 18 May 2005 09:11:07 -0400
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Barbara-

Lots of good feedback already on this post. Just want to stress that the
environment your assembly is in will be VERY important. We coat most
everything (automotive) and the coating used is usually a compromise of
what the application can live with and what the CEM is willing to put in
their equipment. We've seen silicone coatings introduce problems over time
due to outgasses from the coating reacting with other materials in the
overall assembly. Seen acrylic coatings that were eaten up by the type of
grease used elsewhere, etc., etc...

Best Regards and Good Luck,
-Chris




                       Barbara Burcham
                       <[log in to unmask]>          To:   [log in to unmask]
                       Sent by: TechNet                  cc:
                       <[log in to unmask]>                 Subject:    [TN] Conformal Coating of
                                                           Assembled Boards
                       05/16/2005 05:55 PM
                       Please respond to TechNet
                       E-Mail Forum; Please
                       respond to Barbara Burcham







Well, my company now has an application requiring conformal coating on
some small assembled boards. We need to mask off 3 connectors and coat
everything else.

I have some information on a product called Parylene applied by Parylene
Coating Services, Inc. in Katy, Texas.

We did a small lot with a simple spray-on process, but that is not the
way to do production runs, of course.



What would you recommend?

Thanks,

Barbara



Barbara J. Burcham, C.I.D.

Fairfield Industries, Inc

281-275-7687

[log in to unmask]




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