Patent ID: 6405436
Filing Date: 2002-06-18
Classification: B23P,H01L,Y10T

Abstract:
A method of producing a cooling fan attached type heat sink comprising a base, a plurality of radiating fins provided for the base, a fan case engagement portion for engagement with a fan case of a cooling fan for forcefully cooling the plurality of radiating fins and the base, the method comprising the steps of:forming a heat sink preform by casting, forging or extrusion molding, the heat sink preform having the base, the fan case engagement portion and a fin fixation portion for fixing the plurality of radiating fins; and fixing the plurality of radiating fins having a shape that is difficult to be formed or cannot be formed by casting, forging or extrusion molding or having a large tong ratio to the fin fixation portion of the heat sink perform, wherein the plurality of radiating fins are configured as a radiating fin unit in which any two neighboring radiating fins of the plurality of radiating fins arranged side by side are connected by a connecting portion so that the radiating fin unit is formed in an accordion shape.