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May 2002

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Thu, 16 May 2002 11:36:57 -0500
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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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