Patent ID: 8541816

Claim:
A group III nitride electronic device, comprising: a first Al X1 In X2 Ga 1-X1-X2 N (0<X1<1, 0≦X2<1, 0<X1+X2<1) layer; a second Al Y1 In Y2 Ga 1-Y1-Y2 N (0≦Y1<1, 0≦Y2<1, 0≦Y1+Y2<1) layer forming a hetero-junction with the first Al X1 In X2 Ga 1-X1-X2 N layer; a first electrode provided on the first Al X1 In X2 Ga 1-X1-X2 N layer; and a second electrode provided on the first Al X1 In X2 Ga 1-X1-X2 N layer, the first Al X1 In X2 Ga 1-X1-X2 N layer being provided on the second Al Y1 In Y2 Ga 1-Y1-Y2 N layer, a band gap of the first Al X1 In X2 Ga 1-X1-X2 N layer being greater than that of the second Al Y1 In Y2 Ga 1-Y1-Y2 N layer, a carbon concentration in the first Al X1 In X2 Ga 1-X1-X2 N layer being in a range of 3×10 16 cm −3 or higher and less than 1×10 17 cm −3 , a dislocation density of the second Al Y1 In Y2 Ga 1-Y1-Y2 N layer being less than 1×10 8 cm −2 , and the first electrode forming a Schottky junction with the first Al X1 In X2 Ga 1-X1-X2 N layer.