Patent ID: 9484336
Filing Date: 2016-11-01
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a plurality of die pad sections; a plurality of semiconductor chips, each of which is arranged on each of the die pad sections; a resin encapsulation portion including a surface, the surface having a recess portion for exposing at least a portion of the die pad sections, the resin encapsulation portion configured to cover the die pad sections and the semiconductor chips; and a heat radiation sheet arranged in the recess portion, the heat radiation sheet being insulating, the heat radiation sheet composed of an elastic material exposed toward a direction in which the recess portion is opened, the heat radiation sheet directly facing at least a portion of the die pad sections, the elastic material overlapping with at least a portion of the die pad sections when seen in a thickness direction of the heat radiation sheet, wherein the recess portion has a recess side surface surrounding the heat radiation sheet, wherein the heat radiation sheet has a section protruding from the surface of the resin encapsulation portion, wherein the heat radiation sheet is elastically deformable and the heat radiation sheet makes direct contact with the recess side surface of the recess portion, and wherein each of the die pad sections has a die pad rear surface with which the heat radiation sheet makes direct contact, the die pad rear surface being an irregular surface.