Mitch Morey wrote:
>
> 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
>
> >>> FRANCEYJ <[log in to unmask]> 04/30/98 10:14am >>>
> Ed
>
> Your customer is probably asking for "tetrafunctional" epoxy (FR4)
> which has
> comparatively higher Tg and chemical resistance (to "difunctional
> epoxy").
> Your laminate or board supplier will advise.


The key issue in making hybrid FR4/high performance material is to have
materials with matching CTE's in the X/Y plane. In short, both product
families (RO3000 and RO4000 families) can be made into MLB
configurations with FR4 (and there are several programs already doing
so). If you have any additional questions please let me know, thank you.

Art Aguayo, Technical Support Manager
Rogers Corporation, Microwave Materials Division
[log in to unmask]

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