HEAT SINK AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a heat sink that is high in heat radiating efficiency and can be manufactured easily, and to provide a method of manufacturing the heat sink. SOLUTION: The base 2 of the heat sink 1 is composed of a sintered copper compact obtained by molding copper powder by means of a press and sintering the molded body. Heat radiating fins 3 are formed in round bar-like shapes which can obtain larger heat radiating areas than plate-shaped bodies, and planted on the base 2. When the molded body is sintered, the air contained in the copper powder is expelled to the outside and the volume of the press-molded copper powder is reduced. When the volume of the copper powder is reduced, the heat radiating fins 3 are fixed to the sintered copper powder. In addition, since the heat radiating fins 3 which can obtain larger heat radiating areas are fixed to the base 2 having a high coefficient of thermal conductivity, the heat sink 1 having high thermal efficiency can be obtained. COPYRIGHT: (C)2005,JPO&NCIPI