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Originally Posted by unregistered
http://www.thermal-management-testing.com/Hdie1.htm
these people playing with metal-cased resistors attached to a plate are conning themselves, and the uniformed
here's the problem:
one inputs a certain heat (P = I x E), we will presume measured accurately
but WHERE is that heat going ?
all to the "die" area ?
- gimmie a break
ok, so the backside is insulated, - same question:
WHERE is the heat going ?
- backside losses
- exposed frontside non die area losses
and if a "plate" is attached for different die configurations, what about the thermal impeadance of the joint ?
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Ive been looking here there and well almost anywhere and various insulation schemes are mentioned, but Ive yet to see anyone employ a simple vaccum chamber, sure youd need a "custom" top for each of the hose penetration changes, and youd have to address keeping the tubes from collapsing under a vaccum, but its insulative value would be quite high.
just thinking out loud, like what I might use an AC vaccum pump for when not drawing a vac on an AC.
of course youd still want to insulate it to cut down on radiative heat transfer
http://www.opticorp.com/IR_low.htm ???