> -----Original Message-----
> From: Pic Dude [SMTP:picdude@AVN-TECH.COM]
> Sent: Thursday, July 04, 2002 2:31 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [EE]:  Heat-sink conductive material?
>
> Hey folks,
>
> I need to find some sort of material that I can place
> between a TO-220 device and a heatsink, that would
> "fill" an uneven gap.  I only know of mica sheets and
> thermal heat-sink grease (which I'm using), but I'm
> need something more "squishable" that will conform to
> the shape of the gap when squeezed.  Of course, if
> needs to promote thermal heat transfer, but does not
> matter if it conducts electricity or not.
>
> No, it's not easy to adjust it so that the surfaces
> are more parallel to each other.
>
> Cheers,
> -Neil.
>
Several manufacturers make the material you are looking for. Raychem is one
of the larger and make a range of products under their "HeatPath" brand
name.  Thickness up to 15mm can be obtained, although the thermal
conductivity is not great when you use larger the thickness material.

If you can find a local distributor you can probably extract a sample pack
of all the common types that they sell.

Regards

Mike

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