Patent ID: 7294867

Claim:
A semiconductor light generating device comprising: a light generating region including an InAlGaN semiconductor well layer and an InAlGaN semiconductor barrier layer; a first Al X1 Ga 1-X1 N semiconductor layer (0≦X 1 ≦1) doped with p-type dopant; and a second Al X2 Ga 1-X2 N semiconductor layer (0≦X 2 ≦1) having a p-type dopant concentration smaller than that of the first Al X1 Ga 1-X1 N semiconductor layer, the second Al X2 Ga 1-X2 N semiconductor layer being provided between the InAlGaN semiconductor layer and the first Al X1 Ga 1-X1 N semiconductor layer, and wherein the second Al X2 Ga 1-X2 N semiconductor layer is in contact with the light generating region.