As I remember from my first days with
Arctic Silver, the secret used to be that
you would "lap" the mating surfaces
through various methods. The most popular
was to use a flat piece of glass and
progressively finer grit wet sanding
paper, the idea being to get the heatsink
truly flat with only microscopic grooves
left in it from the sanding on 2000 grit
paper.
Once you were satisfied you had made the
heatsink side as flat as possible then you
put one small drop of Arctic Silver in the
center of the chip and then gently pressed
down slightly wiggling back and forth to
spread that one drop out equally in all
directions. Supposedly that would keep air
bubbles from forming and if you did it
well you would see the Arctic Silver
extrude slightly on all four sides showing
that it covered the entire surface.
I never had a problem with thermal
runaway.
73,
Gary
KA1J
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