Patent ID: 8907422
Filing Date: 2014-12-09
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate including a first semiconductor layer, which has a first conductive type and is disposed on a principal surface of the semiconductor substrate; a plurality of semiconductor elements disposed on at least the principal surface of the semiconductor substrate; and an ineffective region, wherein: each semiconductor element includes: the ineffective region is disposed in the semiconductor substrate between at least adjacent two of the plurality of semiconductor elements; the ineffective region does not provide a function of the semiconductor; in each semiconductor element, the second semiconductor layer extends along a predetermined direction, which is perpendicular to a thickness direction of the semiconductor substrate; in each semiconductor element, the third semiconductor layer extends along the predetermined direction, which is perpendicular to the thickness direction of the semiconductor substrate; the ineffective region is disposed in a part of the semiconductor substrate, which extends along the predetermined direction; and the part of the semiconductor substrate is disposed between one of the second and third semiconductor layers in one of the at least adjacent two of the plurality of semiconductor elements and one of the second and third semiconductor layers in the other of the at least adjacent two of the plurality of semiconductor elements.