Tuesday, September 12, 2006

US Patent 7104313 - Magnetic Nanoparticles for Cooling


Fluid based cooling of electronics is fairly common. However, this patent proposes including magnetic nanoparticles in the cooling fluid which increase the thermal conductivity of the fluid and which may be circulated via an electromagnetic pump. Claim 1 reads:

1. An apparatus comprising: a thermally conductive plate to be placed in contact with a heat generating device wherein the heat generating device is selected from a group consisting of a processor, a chipset, a graphics controller, and a memory controller; a fluid loop coupled to the plate to circulate fluid and have the fluid absorb heat from the plate, the fluid loop to thereafter pass the fluid to a heat exchanger, the fluid containing magnetic nanoparticles and deionized water, to facilitate cooling of the heat generating device; and an electro-magnetic pump to circulate the fluid through the fluid loop.