Patent ID: 7718454
Filing Date: 2010-05-18
Classification: H01L,H01S

Abstract:
1. A method for manufacturing a semiconductor laser, comprising: providing a GaN substrate having regions of relatively high dislocation density and regions of relatively low dislocation density; forming a semiconductor layer on said GaN substrate, said semiconductor layer having a plurality of ridge portions; forming a plurality of cuts in said semiconductor layer on said GaN substrate, said cuts being spaced apart at a predetermined interval and at least one of said cuts being located directly opposite one of said high dislocation density regions of said GaN substrate; forming at least one groove in said semiconductor layer, between each of said ridge portions and an adjacent one of said cuts, said at least one groove being spaced from and co-linear with said cuts and being located directly opposite one of said low dislocation density regions in said GaN substrate; and cleaving said GaN substrate along said plurality of cuts.