Patent ID: 9449910
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: an insulating substrate; a circuit pattern having a first surface that is bonded to a first main surface of said insulating substrate and a second surface opposite to said first surface on which a semiconductor element is bonded; a back surface pattern having a first surface that is bonded to a second main surface of said insulating substrate; and a heat dissipation plate bonded to a second surface of said back surface pattern opposite to said first surface of said back surface pattern, wherein a curvature of a corner portion of said circuit pattern is greater than a curvature of a corner portion of said back surface pattern, and the corner portion of said circuit pattern is located inside the corner portion of said back surface pattern in a plan view, wherein the insulating substrate has a removed corner portion.