Susan,
Is this condition detectable by resin content testing, or is it possible
that the glass yarn doesn't adhere well to the resin, even though there is
sufficient resin?
Tim Reeves

> ----------
> From:         [log in to unmask]
> Sent:         Thursday, April 6, 2000 10:57
> Subject:      Re: Laminate porosity
>
> Hi William
> Yes, I have seen several occassions where "dry weave" of laminate - both
> core
> and prepreg - have resulted in severe wicking and/or voiding that shows up
> as
> blow holes in solder joints.
>
> Also microsectioning techniques "can" cause gouging of glass
>
> BUT  if dry weave is present and the microsections are examined in the as
> polished condition, the presence of plating down along the bundles is
> pretty
> obvious.
>
> Susan Mansilla
> Robisan Lab
>

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