True Maximum Temp around IHS area?

V

v3rt1g0

[H]ard|Gawd
Joined
Aug 20, 2002
Messages
1,149
Story:
I have to tag individual processors for tracking purposes. I found these tiny RFID tags that would fit right next to the IHS on all pentium processors. The rated operating Temp for these RFID tags is 85c. I've read through many many Intel datasheets showing mechanicals and thermal design characterisitcs, and I have yet to find one where they say the Maximum "Tcase" temp is above 80c. Now, a couple questions.

What does "maximum Tcase temp" signify? The point when the processor will stop functioning? The processor must always be kept below this value, correct?

If the IHS (integrated heat sink) ever hit 80c, how much hotter would the area surrounding the IHS be?

An engineer told me "That tag better be able to handle 150-200c!"..
That sounds like horseshit in my experience. Anyone?
 
The temps around the IHS should be right around the temps of the internal diode on the cpu.

80-85C is basically the breaking temp for most modern chips now adays. Some go up to like 95C but anyway.

You wont see anything drastic in way of temp changes between the cpu diode and outside of the IHS. It might be warmer because of air stagnation, but the most I could possibly think to see would be maybe like 3C max or something.

Oh, and if that IHS ever got over 100C, I think there would be more serious problems then if your tag is going to survive the temps.
 
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