All,

We have a current PWB assembly that uses an aluminum stiffener bonded to one
surface for mechanical reasons.  The problem with this is that during extreme
thermal excursions (as required by the operating environment of the assembly)
the assembly flexes a great deal due to the expansion mismatch.  Luckily, we may
have to opportunity to do a re-design of the assembly and move to some different
method of stiffening.  Our experiences in this subject are very limited, and
would greatly appreciate any options for stiffening a PWB from a board design
standpoint (i.e.-some type of cored board, other materials either PWB or
stiffener, etc.).

Thanks in advance for your help.

Steve McBride

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