Patent ID: 7736925
Filing Date: 2010-06-15
Classification: B82Y,H01S

Abstract:
1. A method of manufacturing a nitride-based semiconductor laser diode, the method comprising: forming on a (0001) GaN (gallium nitride) substrate at least two <11-20> oriented masks spaced apart by a distance equal to a laser cavity length in stripes that extend along the <11-20> direction of the GaN substrate; growing an n-GaN layer on the GaN substrate so that two regions of the n-GaN are disposed such that each region is disposed corresponding to an individual <11-20> mask of the at least two <11-20> oriented masks, and each region includes two <11-20> oriented n-GaN portions which oppose each other with respect to the individual <11-20> mask, wherein the two <11-20> oriented n-GaN portions of each region have a greater thickness than a remaining portion of the n-GaN layer, and wherein n-GaN is not disposed between the two <11-20> oriented n-GaN portions in each region; sequentially stacking an n-clad layer, an active layer, and a p-clad layer on the n-GaN layer to form an edge-emitting laser cavity structure in which laser light generated in the active layer passes through a region of the n-clad layer aligned laterally with the active layer and is output; and etching a (1-100) plane of the laser cavity structure to form a cavity mirror plane, wherein the at least two <11-20> oriented masks provide a path for diffusing residual source gas when the n-GaN layer is being grown.