Mitch -

I personally worked on one 4 layer design for an RF Transmitter that used a
sandwich of 2 RO4003 cores an a center layer of FR-4 prepreg. This design
preformed extremely well and was simple to tune.  I have also bonded RO4350
with G-tek prepreg  which formed a very rigid  and thermal stable PWB.
Contact me off-line and I can recommend a fabricator for these types of
PWB's.

Jeffrey A. McGlaughlin
[log in to unmask]
Printed Circuit Board Designer
Battelle Memorial Institute
Columbus Ohio


        -----Original Message-----
        From:   Mitch Morey [SMTP:[log in to unmask]]

        I have a "similar" question which hopefully someone can answer. I've
        been asked by our engineering group if FR4 material, is compatible
with
        the Rogers 3000 and 4000 materials? We'd like to make a board using
the
        Rogers material for some circuitry and FR4 material with the other
        circuitry.

        Any luck?

        Mitch Morey
        Sr PCB Designer
        NSI Communications (was ComStream Corp)
        San Diego CA



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