Patent ID: 9502326
Filing Date: 2016-11-22
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a semiconductor element; a plastic body in which the semiconductor element is embedded; a first heatsink plate bonded to a first surface of the plastic body, the first heatsink plate being fixed to the semiconductor element in the plastic body; and a second heatsink plate bonded to a second surface of the plastic body so as to be opposed to the first heatsink plate, the second heatsink plate being fixed to the semiconductor element in the plastic body, and the second surface being opposite to the first surface, wherein a bonded surface of the first heatsink plate with the plastic body comprises a high stress area, the high stress area has a possibility of generating tensile stress equal to or higher than a predetermined stress value, and a plurality of grooves, a plurality of protrusions, or both of the plurality of grooves and the plurality of protrusions are provided in the high stress area.