I had a similar question awhile back and that's the material we are going
with... Rogers 4350. 

In our application it makes more sense to use the same material all through
the board rather than bonding PTFE to another substrate. 

It turns out that Rogers 4350 has very good Dk and loss tangent figures and
should be a good solution for our application... 

I'll let you know after the boards come in and we test them.

Bill Brooks 
PCB Design Engineer, C.I.D.+
Tel: (760)597-1500 Fax: (760)597-1510
Datron World Communications, Inc.
Vista, California

-----Original Message-----
From: Jack Olson [mailto:[log in to unmask]] 
Sent: Wednesday, March 14, 2007 6:29 PM
To: [log in to unmask]
Subject: Re: [DC] Information on multilayer boards with teflon materials
made using fusion bonding

You may already know this, but there are materials
with similar characteristics that are better suited to
multilayer constructions, if you can get away with it.

Maybe compare your needs to Rogers 4350?

We tried that on a previous project and it was good
enough for our 2.7GHz, and saved a ton of money too.

(My only experience with teflon is single-layer
circuits bonded to aluminum palettes, so I can't
help you with your real question.)

good luck,
Jack



On 3/13/07, Post, Devon <[log in to unmask]> wrote:
>
> Does anyone have a contact or companies that they work with, and are
> willing to share, that can build a multilayer board out of
> high-frequency teflon dielectrics using fusion bonding as their
> lamination method for these dielectrics.
>
> These would be research type boards with currently no mass production
> planned.
>
> Devon
>
> ========================================================================
> Devon J. Post - C.I.D.                           Mayo Foundation
> <mailto:[log in to unmask]>                   200 First Street SW
> Voice:  (507) 538-5479                           Sn 2-134C
> Fax:    (507) 284-9171                           Rochester, MN 55905
> Internet:  http://www.mayo.edu/sppdg/sppdg_home_page.html
> ========================================================================
>
>

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