Colin,

How much heat you moving?  Does thermal resistance at the heatsink junction
have to stay low, or extremely low.  If you have to move a lot of heat,
Chomerics has a process called Power Site that allows you to solder your
device directly to the heatsink (see
http://www.parker.com/chomerics/products/documents/powersite_cat.pdf.).
Have you investigated thermally conductive adhesive tape?  They don't have
the mess of the thermal adhesives and they are repairable.  Check out 3M
http://www.3m.com/us/mfg_industrial/adhesives/html/tc_selector.jhtml or
Bergquist http://www.bergquistcompany.com/therm.htm, they might give you
some thermal management ideas.

Good Luck,

Gary Camac

----- Original Message -----
From: "Colin Weber" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 12, 2002 9:06 PM
Subject: [TN] Thermal Potting Mix


> We have a scenario where we want to put string of rectifier diodes in
> series, onto
> an aluminium heatsink, to conduct heat from them. What we envisaged doing
is
> soldering these diodes onto a single sided circuit board and potting this
> assembly
> onto the heatsink.
>
> My question is what is the most suitable thermally conductive potting mix
to
> use for this case, and will not let loose, or break free from the
aluminium
> over
> time?
>
>
> Regards,
>
> Colin Weber
>
> Regards,
>
> Colin Weber
>
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