Patent ID: 8084764

Claim:
A nitride semiconductor light emitting device comprising: an n-type nitride semiconductor layer; a nitride semiconductor active layer; a first p-type nitride semiconductor layer between said n-type nitride semiconductor layer and said nitride semiconductor active layer; and a second p-type nitride semiconductor layer on the opposite side of said first p-type nitride semiconductor layer from said nitride semiconductor active layer, wherein said first p-type nitride semiconductor layer is a layer that is distinct from said nitride semiconductor active layer, said second p-type nitride semiconductor layer includes a p-type Al x3 In y3 Ga z3 N (0≦x3≦1, 0≦y3≦1, 0≦z3≦1, x3+y3+z3≠0) layer in contact with said nitride semiconductor active layer, and said nitride semiconductor active layer includes an undoped nitride semiconductor layer at the most adjacent side to said first p-type nitride semiconductor layer.