Try Ablestik  (or maybe Emerson and Cumings, same company different
division), Their ECF (electrically conductive film) product range contains
silver filled glass fibre mat type materials and also unfilled. Multicore
did have some similar products but I am not sure what happened to these
since Loctite.

Mike Fenner
Indium Corporation of Europe


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Genny Gibbard
Sent: Wednesday, May 30, 2001 6:52 PM
To: [log in to unmask]
Subject: Re: [TN] conductive epoxy prepreg


All of these products are electrical insulators.  I would have suggested
also that Raychem and Chomerics make sheets of thermal conductive material
that can be cut into any shape, but all of these are electrical insulators
as well.
The difficult part of what Bob is asking for is the electrically conductive
property.  Chomerics has one product that has a foil carrier material to be
able to apply a stronger adhesive to the material but the foil is only on
one side.  We stopped using it because we got some solder peaks on signal
vias that pushed thru the soft thermal material and grounded to the foil
which was against the grounded heatsink.  The heatsink grounding was
accomplished thru the screws which we used to mount the heatsink to the pcb.
We had pemnuts installed in the heatsink for the mounting.
-----Original Message-----
From: Anselmo, John [mailto:[log in to unmask]]
Sent: May 30, 2001 10:24 AM
To: [log in to unmask]
Subject: Re: [TN] conductive epoxy prepreg


3M makes both of these products.  Go to
http://www.3m.com/bonding/html/thermalcond.html
Regards,
John
-----Original Message-----
From: <Bob Mcgarry> [mailto:[log in to unmask]]
Sent: Wednesday, May 30, 2001 9:58 AM
To: [log in to unmask]
Subject: [TN] conductive epoxy prepreg


Does anyone know of a electrically and thermally conductive epoxy prepreg
that can be used to bond PCB's to heatsinks. Material must be conductive and
have the properties of a no-flow type prepreg to avoid flow into gaps in the
heatsink.
Thanks,


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