When bonding a heat sink to a processor, it is HIGHLY recommended that you
use thermal grease, aka heat sink compound. This will ensure good heat
transfer between the heat sink and processor. Using things like aluminum
foil and glue can introduce air gaps, and air is a very good insulator -
we want conduction.
You can buy heat sink compound at radio shack or any computer store where
they actually build computers. It comes in a tube similar to a travel
size toothpaste tube but is a little smaller, and is a white goop with
a texture similar to caulk. Don't put so much on that a lot starts
coming out of the sides when you stick the heat sink on. You should just
be able to wipe the excess off.
Good Luck!
-John
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