Patent ID: 8283775

Claim:
A semiconductor device comprising: a semiconductor element having an active element region; a plurality of element electrodes formed on a principal face of the semiconductor element; an external terminal connected to the one or more element electrodes via a connection member; one or more first heat-dissipation protrusions formed on the principal face of the semiconductor element; an insulation resin layer covering the principal face of the semiconductor element and the first heat-dissipation protrusion; and a heat-dissipation medium contacting a face of the insulation resin layer on a side opposite to a side contacting a front face of the first heat-dissipation protrusion, wherein at least a part of the active element region is included in a region below a bottom face of the first heat-dissipation protrusion, the first heat-dissipation protrusion is not connected to the external terminal within the active element region, a thermal conductivity of the first heat-dissipation protrusion is larger than a thermal conductivity of the insulation resin layer, and a thickness of the insulation resin layer from the front face of the first heat-dissipation protrusion to the heat-dissipation medium is thinner than a thickness of the insulation resin layer from the principal face of the semiconductor element to the heat-dissipation medium.