Patent ID: 9537002
Date: 2017-01-03
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a source electrode formed on a first surface of a semiconductor; a gate electrode formed via an insulation film on the first surface of the semiconductor; and a drain electrode formed on a second surface of the semiconductor, wherein the semiconductor has: the first surface of the base layer, a surface of the first portion, and a surface of the second portion are exposed as constituent surfaces of the first surface of the semiconductor, the first portion is positioned to be interposed between the base layer and the second portion on the first surface side of the base layer, a second surface of the base layer is the second surface of the semiconductor, the gate electrode is disposed on the surface of the first portion such that the first surface of the base layer is completely excluded as an arrangement position of the gate electrode, the first portion directly contacting the base layer at the first surface of the semiconductor; the base layer is made up of: the drain electrode is connected to a second surface of the silicon carbide substrate, and the first portion is formed inside the first silicon carbide layer.