Robert

The simple answer to your question is DO NOT clean the coated assembly as
you have described.

You would be well advised to strip the coating off, do whatever repair or
rework, clean and then re-coat. It will probably be the cheapest option as
well.

Regards
Graham Naisbitt
[log in to unmask]
Web: www.concoat.co.uk
Concoat Ltd
Alasan House, Albany Park
CAMBERLEY GU16 7PH
Tel: +44 (0) 1276 691100
Fax: +44 (0) 1276 691227

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of bbarr
Sent: Thursday, December 21, 2000 05:22
To: [log in to unmask]
Subject: [TN] Conformal Coating and Aqueous Cleaning


I have some boards that are coated with acrylic conformal coating. We have
to do a few chip replacements. The coating will be selectively stripped
around the chips and the rework performed. Is there a problem with sending a
coated board through an in-line aqueous cleaner? I am running just water at
130 degrees F. Will the pressure damage the coating? Will the water
recycling system become contaminated? Do I have to strip the board
completely prior to rework to avoid any problems?

Thanks for your help.


Bob


Robert Barr
Manufacturing Engineering
Formation, Inc.
Voice: 856-234-5020 x3035
Fax: 856-234-6679
email: [log in to unmask]

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