Patent ID: 8405125

Claim:
A semiconductor device formed on a GaN-based layered body having an opening and including an n-type drift layer and a p-type layer located on the n-type drift layer, the semiconductor device comprising: a regrown layer including a channel and located on the GaN-based layered body so as to cover the opening; a gate electrode located on the regrown layer and formed along the regrown layer; a source electrode located on the regrown layer, wherein the regrown layer separates the source electrode from the GaN-based layered body; a conductive portion to electrically connect the p-type layer and the source electrode; and a drain electrode located so that the drain electrode and the source electrode sandwich the n-type drift layer, wherein the regrown layer includes an electron transit layer and an electron supply layer, the channel is a two-dimensional electron gas formed at an interface between the electron transit layer and the electron supply layer, the opening reaches the n-type drift layer, and an edge of the gate electrode is not located outside a region of the p-type layer when viewed in plan.