Patent ID: 9362366
Filing Date: 2016-06-07
CPC Classification: H01L

Claim Text:
1. A semiconductor element comprising: a silicon carbide substrate having a first main surface and a second main surface; a silicon carbide layer disposed on the first main surface of the silicon carbide substrate; an ohmic electrode layer disposed on the second main surface of the silicon carbide substrate; and a metal electrode layer disposed on the ohmic electrode layer, wherein a notch is formed along at least one pair of sides, facing each other, of a periphery of the second main surface of the silicon carbide substrate, the ohmic electrode layer and the metal electrode layer are disposed in a region ranging from a position on the second main surface to a surface of the notch, a cross-section of the notch orthogonal to each of the sides has a corner, in the cross-section, a thickness of the silicon carbide substrate at an edge thereof under which the notch is formed is smaller than a thickness of the silicon carbide substrate in a region under which the notch is not formed, and larger than a thickness of the silicon carbide substrate in a region under which a bottom of the corner is formed, and a groove is further disposed in the second main surface of the silicon carbide substrate and includes a portion which is spaced apart from the notch.