Brent,

Don't know of any environmental issues but I would suggest you check for
adhesion.

My information is that Paralene seemingly will not work with no-clean
processed assemblies, flux residues and all that. I am sure that someone at
SCS will correct me if I am wrong.

Paralene is a great process but it is expensive and time consuming being
batch processing using a vacuum chamber. Unless otherwise specified, you may
well find that a conventional coating will do that job equally well but more
easily and at less cost.

Regards, Graham Naisbitt
__________________________________________________________________________

[log in to unmask]

Concoat Ltd
Alasan House, Albany Park
Camberley GU15 2PL UK                        http://www.concoat.co.uk

-----Original Message-----
From: Brent Alcorn <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: 05 June 1998 13:12
Subject: [TN] Parylene Conformal Coating line requirements.


>Hi Everyone,
>
>The company I work for is looking at installing a Parylene conformal
>coating system.  In an effort to obtain an unbias opinion I would like
>to know:
>
>1) What are the environmental issues ?
>
>2) How clean does the PWB substrate have to be (FR4)?  Do we need a
>"CLEAN ROOM" and are there special pre-coating requirements?
>
>Thanks
>Brent Alcorn
>
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