Patent ID: 7234513
Filing Date: 2007-06-26
Classification: F28D,H01L

Abstract:
1. A heat sink for a heat generating device, comprising: an enclosed metal chamber, to be in contact with said heat generating device; a two-phase vaporizable coolant recycled in said chamber to remove heat from said heat generating device; a flow path comprising an upper section and a lower section, said upper section and said lower section being separated by an isolation plate and connected by a conveying conduit at ends for said coolant to flow from said upper section to said lower section, said upper section being in contact with the inner top wall of said chamber for vapor condensation and heat dissipation; said lower section functioning as part of a recycling passage for the condensed coolant; a conveying conduit at one end of the upper section; a wick in said lower section, a portion of said wick functioning as an evaporator and the other portion of the said wick functioning as a liquid passage to draw said condensed coolant from said upper section by capillary attraction force through said conveying conduit; and said coolant collected within said evaporator waiting to be vaporized by the heat from said heat generating device; and a guiding plate mounted on top of said evaporator to allow part of coolant condensed on the inner top surface of said chamber to flow downward back to the evaporator.