HEAT SINK COOLING FAN EXCELLENT IN HEAT RADIATION PROPERTY, AND ITS MANUFACTURE

摘要

PURPOSE: To improve heat radiation performance by constituting a heat sink out of a bottom plate and a hollow projection standing erect on the bottom plate and united with the bottom plate, and forming the peripheral wall of the hollow projection out of a plurality of parallel plate-type fins standing erect on the bottom plate or pin-type fins. ;CONSTITUTION: For a heat sink 35, a bottom plate 31 consisting of a good heat conductor, and thereon, an erect hollow projection 36 having a hollow area 32, in short, a hollow section, and, surrounding this hollow region 32, a hollow projection 36 are made. The peripheral wall of the hollow projection is constituted of a row of heat radiation fins 34 made of a good heat conductor erect on the bottom plate 31. The heat radiation fins 34 in a row are constituted of a plurality of unit fin elements 33. The heat generated by a chip is conducted to the heat radiation fins 34 in a row through the bottom plate 31 of the heat sink 35 by heat conduction. On the other hand, cool air for cooling is supplied to the hollow area 32 of the fins in a row through the opening 42 at the center of a top board, and then it takes the heat off from the heat radiation fins 34 in a row.;COPYRIGHT: (C)1993,JPO&Japio