Patent ID: 6370027
Filing Date: 2002-04-09
Classification: H05K

Abstract:
A heat sink for a semiconductor module, comprising:a pair of metallic plates between which a circuit board, having attachment holes, is to be disposed in such a manner that spaces are defined between said circuit board and said pair of metallic plates for accommodating one or more semiconductor elements or semiconductor devices mounted on said circuit board, when said pair of metallic plates are attached to said circuit board; one of said metallic plates having through holes therein at positions corresponding to respective said attachment holes; the other metallic plate having tubular projections extending therefrom at positions corresponding to said respective attachment holes, the tubular projections having a length larger than a sum of a thickness of said circuit board and a thickness of said one metallic plate; said tubular projections being insertable into said corresponding attachment holes and said corresponding through holes and tip ends of said tubular projections being enlargable so as to firmly attach said pair of metallic plates to said circuit board; and a connecting portion integrally interconnecting said pair of metallic plates, the connecting portion having a width substantially the same as the thickness of said circuit board, said pair of metallic plates being bendable along respective, common edges of said pair of metallic plates and said connecting portion so as to be attached to said circuit board when disposed therebetween.