HEAT SPREADER WITH VAPOR CHAMBER DEFINED THEREIN AND METHOD OF MANUFACTURING THE SAME

摘要

A heat spreader ( 10 ) and a method for manufacturing the heat spreader are disclosed. The heat spreader includes a metal casing ( 12 ) and a wick structure ( 16 ) lines an inner surface of the metal casing. The metal casing defines therein a chamber ( 14 ) and includes an evaporating section ( 126 ) and a condensing section ( 127 ). The wick structure is in the form of metal foam and occupies a portion of the chamber. In one embodiment, the wick structure has a pore size gradually increasing from the evaporating section towards the condensing section of the metal casing. The heat spreader is manufactured by electrodepositing a layer of metal coating ( 70 ) on an outer surface of a metal foam framework ( 20 ). The metal coating becomes the metal casing and the metal foam framework becomes the wick structure.