Patent ID: 6548319
Filing Date: 2003-04-15
Classification: H01S

Abstract:
A method for manufacturing a semiconductor laser diode comprising:sequentially forming a buffer layer, a first clad layer, a first waveguide layer, an active layer, a second waveguide layer, a second clad layer, and a cap layer on a substrate; forming an etching mask on the cap layer; sequentially patterning the cap layer and the second clad layer using the etching mask, and forming a ridge structure by etching the second clad layer in a range of not exposing the active layer; selectively forming a passivation layer by forming a metal layer selected from a group consisting of Ti and Zr, and oxidizing said metal layer, for covering the side walls of the cap layer and the second clad layer patterned as the ridge structure using the etching mask; and forming an electrode in contact with the cap layer on the passivation layer after the etching mask is removed.