Patent ID: 7817692

Claim:
A nitride semiconductor laser comprising: a laminate including an n-side semiconductor layer; an active layer; and a p-side semiconductor layer, wherein one of said n-side semiconductor layer and said p-side semiconductor layer includes a current blocking layer having a stripe-shaped window formed therein to pass current flow, wherein said stripe-shaped window is formed in said current blocking layer such that a residual film portion is formed in said current blocking layer and such that said residual film portion is formed along said stripe-shaped window of said current blocking layer, wherein said residual film portion is formed in said current blocking layer, such that a part of said current blocking layer that makes contact with a layer lying thereunder remains in an entirety of said striped-shaped window, wherein a thickness of said residual film portion formed in said current blocking layer is smaller than a thickness of other portions of said current blocking layer, such that current is injected into said active layer through said residual film portion, wherein the thickness of said residual film portion is not less than 10 Å and the thickness of said residual film portion is smaller than 100 Å, and wherein a total thickness of said current blocking layer is not less than 100 Å and the total thickness of said current blocking layer is not more than 800 Å.