Patent ID: 9142644
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A semiconductor device, comprising: an n+ type silicon carbide substrate; an n− type epitaxial layer, a p type epitaxial layer, and an n+ region, sequentially disposed on a first surface of the of silicon carbide substrate; a trench penetrating the n+ region and the p type epitaxial layer, disposed on the n− type epitaxial layer, and including a plurality of protrusions disposed on both sides of the trench; a gate insulating film disposed within the trench; a gate electrode disposed on the gate insulating film; an oxide film disposed on the gate electrode; a source electrode disposed on the p type epitaxial layer, the n+ region, and the oxide film; and a drain electrode positioned on a second surface of the n+ type silicon carbide substrate, wherein the plurality of protrusions extend to the p type epitaxial layer, and wherein the protrusions positioned on one side of the trench are spaced apart from each other.