Looks like toothed washers for mechanical-electrical mounting  are used in
the area. I expect any 'butter' coating is compromised as a result.

RL
----- Original Message -----
From: <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 16, 2002 12:36 PM
Subject: Re: [TN] High Voltage tracking on pbc surface


> Earl,
> I was talking not so much about the resin to glass ratio, which will
affect
> primarily dielectric constant and dissipation factor, but as to the butter
> coat of resin.  How much or how thick a layer of pure resin is present on
> the top and bottom of the glass reinforcement.  If that layer is
> compromised, you have weave exposure, and thence susceptibility to
> contaminant absorption.  With the drive to get to thinner and thinner
> laminates, that resin layer often is the area that gets minimized.
>
> Doug
>
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