Patent ID: 8368206

Claim:
A heat radiation package for a semiconductor element which generates heat, the heat radiation package comprising: a substrate; a plurality of recess portions provided in an upper surface side of the substrate such that the substrate is left continuous across a respective bottom surface of each of the plurality of recess portions; an embedded wiring portion which is respectively filled in a whole of a depth direction and a whole of a width direction of said plurality of recess portions of the substrate, and on which the semiconductor element which generates heat is to be mounted, wherein the embedded wiring portion is electrically connected to the semiconductor element mounted thereon; and a heat sink connected to a lower surface side of the substrate; wherein the substrate is interposed between the adjacent recess portions, and a thickness of the respective embedded wiring portions is set thicker than a thickness of the substrate between a lower surface of the embedded wiring portion and a lower surface of the substrate.