Patent ID: 6411510
Filing Date: 2002-06-25
Classification: H01L

Abstract:
A cooling apparatus comprising:a heat sink to dissipate heat generated from a heat source; said heat sink including a base plate increased in thermal conductivity and including a front surface and a rear surface with which the heat source is contacted, a virtual central line defined so as to extend in a direction perpendicular to said front surface of said base plate, a plurality of virtual vertical planes defined so as to extend in both a radial direction from said central line and a vertical direction perpendicular to said front surface of said base plate and be spaced from each other at equal intervals in a circumferential direction of a virtual circle defined about said central line, and a radiation fin unit mounted on said front surface of said base plate in a manner to be heat-transferable and including a plurality of radiation fins arranged so as to surround said central line while aligning said central line with a center in arrangement of said radiation fins; and a cooling fan including an impeller which includes a plurality of blades and is rotated by a motor and mounted on said heat sink so that said impeller is positioned above said radiation fin unit; said radiation fins each including a lower edge, an upper edge positioned opposite to said lower edge, and a radiation surface positioned between said lower edge and said upper edge; said lower edges of said radiation fins each being mounted on said front surface of said base plate in a manner to be heat-transferable and so as to be positioned on an intersection line between said virtual vertical plane corresponding to each of said lower edges and said front surface of said base plate; said radiation fins each being arranged while being inclined in an identical direction with respect to said virtual vertical plane so that an inclination angle &thgr; of predetermined degrees between said radiation surface of said radiation fins and said virtual vertical plane may be defined; said radiation fin unit and cooling fan being arranged in positional relationship which permits each of said blades of said cooling fan and said upper edge of each of said radiation fins to be opposite to each other; said cooling fan being arranged so as to permit cooling air to be fed to said radiation fins of said radiation fin unit.