Gerald

We monitored this many years ago when we (Bell Laboratories) began
converting to selected part numbers to single ply. We never detected a
statistically significant difference.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389

----- Original Message -----
From: "Gerald Gagnon" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, June 14, 2006 9:54 PM
Subject: [TN] Warpage in single ply vs multi-ply multilayer stackups


> Hi All,
>
> I should probably know the answer to this, but thought I'd pose the
> question
> and get alternative theories and points of view.
>
> Is anyone finding a difference in the level of PWB warpage between
> multilayer constructions made of multi-plies versus single-ply?
>
> Assume in both cases that the supplier, processing, and materials are
> identical.
>
> Best Regards,
>
> Gerry
>
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