Patent ID: 8941174
Filing Date: 2015-01-27
Classification: H01L

Abstract:
1. A vertical semiconductor device including a GaN-based stacked layer having an opening, the GaN-based stacked layer including n-type GaN-based drift layer/p-type GaN-based barrier layer/n-type GaN-based contact layer in that order to a top layer side, the opening extending from a top layer and reaching the n-type GaN-based drift layer, the semiconductor device comprising: a regrown layer located so as to cover a wall surface and a bottom portion of the opening, the regrown layer including an electron drift layer and an electron source layer; a source electrode that is in contact with the regrown layer, the n-type GaN-based contact layer, and the p-type GaN-based barrier layer; a gate electrode located above the regrown layer in the opening; and a bottom insulating layer located below the gate electrode and only in the bottom portion of the opening, wherein the bottom insulating layer is located on the regrown layer that covers the bottom portion of the opening.