Patent ID: 6888866

Claim:
A semiconductor laser device comprising: a substrate, a semiconductor layer including an active layer, a cladding layer, and a contact layer stacked in the recited order; two exposed portions having a depth at which said semiconductor layer is exposed continuously from one of two resonator end faces to the other; and a ridge portion, formed between said two exposed portions, which has a current injection window formed in a top surface of said ridge portion; wherein in at least one of the resonator end faces of said ridge portion, a portion of said contact layer near said one resonator end face is removed; an insulating film is formed so that it covers a region, excluding said current injection window, of said contact layer, and portions of said cladding layer exposed by removing the portion of said contact layer near said one resonator end face; and an electrode is formed on at least a portion of said contact layer exposed to said current injection window.