Ken,

I'm with Dewey and Lee on this one!

I would definitely have separate equipment all down the line for the
silicone coating.

We often come across customers having massive dewetting due to silicone
contamination, and most of the time its introduced from the equipment rather
than already on the board.

We have also experienced silicone in our cleaning tanks from uncured RTV's.

Cleaning with solvents will not remove all the silicone traces from your
equipment.

Regards,

Alan Brewin.

Concoat Ltd.
2C Albany Park, Frimley Road,
Camberley. Surrey. GU15 2PL. UK.
TEL: +44 (0)1276 691100
FAX: +44 (0)1276 691227

-----Original Message-----
From: Ken Bloomquist <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: 19 May 2000 14:43
Subject: [TN] Silicone Confromal Coating


>Hi TechNet,
>
>We have a customer that wants us to spray Silicone confromal coating on
>their boards. We currently spray polyurethane and acrylic.
>
>My question is: Is there any problem adding Silicone to our process? What
>art the things we need to consider in adding this process?
>
>Thanks,
>
>Ken Bloomquist
>
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