Patent ID: 8785976

Claim:
A semiconductor device, comprising: an In z Ga 1-z N layer, where 0≦z<1, an Al x Ga 1-x N layer, where 0<x<1, on the In z Ga 1-z N layer, an In y Ga 1-y N layer, where 0≦y<1, on the Al x Ga 1-x N layer; and a p-type In w Ga 1-w N layer, where 0≦w<1, on the In y Ga 1-y N layer, a two-dimensional hole gas being formed in the In y Ga 1-y N layer in the vicinity part of a hetero-interface between the Al x Ga 1-x N layer and the In y Ga 1-y N layer, and a two-dimensional electron gas being formed in the In z Ga 1-z N layer in the vicinity part of a hetero-interface between the In z Ga 1-z N layer and the Al x Ga 1-x N layer at a non-operating time, wherein the semiconductor device is a diode, a mesa is formed at least in the In y Ga 1-y N layer and the p-type In w Ga 1-w N layer, an anode electrode extends to the Al x Ga 1-x N layer adjacent to the mesa from the upper surface and the side surface on one end, and a cathode electrode extends to the Al x Ga 1-x N layer adjacent to the mesa from the upper surface and the side surface on the other end.