Wes,

Two sheets of prepreg provide better control agains -epoxy starvation,
voids.
One sheet may have higher probability of  developing meatl to metal
shorts due to - voids, epoxy starvation, and possible migration paths
along glass fibres. This probability is reduced when two sheets are used.

These observations were based on actual production experience at one of
the large board manufacturer.

--
_________________________
pratap singh
tel/fax: 512-255-6820
email: [log in to unmask]
WEB: www.rampinc.com

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