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September 2003

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Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 5 Sep 2003 07:40:24 -0700
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        Steve:
        In a previous, we used to coat 90% of the boards with silicone, a
process that was used for many years. They were going to be on planes
sitting on aircraft carriers. They would be exposed to extreme temperatures,
humidites and pressures. Silicone did the job.
        Regards,
        Ramon

> -----Original Message-----
> From: Steve Gregory [SMTP:[log in to unmask]]
> Sent: Thursday, September 04, 2003 3:35 PM
> To:   [log in to unmask]
> Subject:      [TN] Silicone conformal coating
>
> Hi All!
>
> I know when you look up properties for Silicone conformal coating, it
> usually states that it has good moisture resistance, but is it really that
> good?
>
> I've heard that it is somewhat permeable to moisture, that if you were
> worried about moisture, and the assembly were going to see the outside
> environment, you would be better off with an acrylic, or urethane coating.
>
> Any thoughts?
>
> Thanks!
>
> -Steve Gregory-
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