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Reply To: | TechNet Mail Forum. |
Date: | Mon, 19 Jan 1998 12:25:00 -0500 |
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See below.
Also, I suggest that you go back to this forum archives. You'll find a lot
of valuable information there. There's also the May 1997 issue of Circuits
Assembly dealing with coating.
Richard Blanchet
Canadian Marconi
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From: owner-technet
To: TechNet
Subject: [TN] CONFORMAL COATINGS ON PCBS
Date: Monday, January 19, 1998 4:16PM
I have just been asked a question about conformal coatings on printed
circuit
boards
and I can remember this question arising on this forum some time in the
past.
I would again like to bring this subject up to try and find out some of the
following answers.
The board I wish to apply this coating to is to be used in a high humidity
environment
(I) What type of conformal coatings are available ?.
==> Silicone can offer protection to some extent. Parylene may be the best
protection against humidity.
(ii) How easy is it to apply?.
==> Parylene requires a special vacuum equipment. SCS has some.
(iii) What will it cost?.
==> From 30K$ to whatever you want to spend.
(iv) Is it possible to remove after application for rework etc?.
==> Not an easy job. Mechanical removal.
Thank you
Jim Hedderick
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