Patent ID: 7227879

Claim:
A nitride semiconductor laser comprising a laminate that includes an n-side semiconductor layer, an active layer and a p-side semiconductor layer, said n-side semiconductor layer or p-side semiconductor layer including a current blocking layer that is made of In x Al y Ga 1-x-y N(0≦x≦0.1, 0.5≦y≦1, 0.5≦x+y≦1) and has a stripe-shaped window formed therein to pass current flow, wherein said current blocking layer is formed on: a first semiconductor layer having Al; a second semiconductor layer formed on said first semiconductor layer, said second semiconductor layer being without Al or having lower Al ratio than that of said current blocking layer and being partly removed from the portion corresponding to the window of said current blocking layer; wherein said current blocking layer is formed in said p-side semiconductor layer, and wherein a semiconductor layer that fills the window of said current blocking layer has an equal or lower refractive index than that of a semiconductor layer that is in contact with the bottom surface of said first semiconductor layer.