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Integrated Peltier Junctions On CPU Die
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Peltier devices are often constructed out of semiconducting junctions on a semiconductor substrate. CPUs get hot and some require cooling. CPUs, as it happens, are constructed out of semiconducting junctions on a semiconductor substrate.

What about distributing and interspersing driven Peltier-effect junctions in and among the transistor arrays on a CPU substrate? The silicon can be used to cool itself.

—Ian Tindale, May 04 2005

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       Where do the hot junctions go?
—Mr Burns, May 04 2005
   

       Given the size of most peltier devices that Google finds, they would make a silent alternative to a fan if stuck to your CPU with thermal paste.
—wagster, May 04 2005
   

       <tongue-in-cheek>Just remove the hot-side junctions, we don't want those anyway!</tic>   

       A peltier junction is not a magical cooling device, it's an electical heat-pump, and not a particularly efficient one at that. And just like any other heat pump, it requires energy to operate. This energy invariably gets converted to...that's right...more heat!   

       If you put a peltier on a CPU, you need an even bigger heat sink to carry away the extra heat. Putting lots of tiny peltiers right on the silicon may help individual areas of the chip that need extra cooling, but overall, it's a last-resort measure that CPU makers are trying to avoid.
—Freefall, May 04 2005
   


 

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