You may want to try liquid crystal polymer (LCP).  LCP is a flexible
material with a Dk of 2.9, a Df of .002 and CTE of 17ppm.  I believe that
the material is .002 as a standard thickness.

I know that Yamaichi and Rogers make LCP, and I think that Gore does also.

Bret

        -----Original Message-----
        From:   Tim Reeves [mailto:[log in to unmask]]
        Sent:   Friday, September 13, 2002 8:20 AM
        To:     [log in to unmask]
        Subject:        Re: [TN] Looking for very thin, Low Dk and Low loss
material

        I am aware only of PTFE and Gore speedboard C (contains PTFE) having
a dielectric constant that low.

        see
http://www.goreelectronics.com/products/dielectric_materials/Speedboard_C_Pr
epreg.html





        Hello,


        -----Original Message-----
        From: SDC's Tech Net [mailto:[log in to unmask]]
        Sent: Thursday, September 05, 2002 7:30 PM
        Subject: Looking for very thin, Low Dk and Low loss material


        Hello everybody,
                I am in need of core material and prepreg material with very
low
        Di-electric constant(Dk) and low loss factors.Dk is about 3.0 or
less with
        very thin profile of the material.Di-electric thickness spec will be
2.4mil
        or less.Any help on the subject will be appriciated.

        Thank you all
        Kris Vasoya
        VP of Operations.
        Thermal Works
        ph:714-540-8454 Ext:136
        fax:714-540-1299
        e-mail: [log in to unmask]
        www.thermalworks.com


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