Patent ID: 8502238
Filing Date: 2013-08-06
Classification: H01L,H01S

Abstract:
1. A nitride semiconductor laser device comprising: a nitride semiconductor substrate; and a nitride semiconductor layer stacked on the nitride semiconductor substrate, wherein the nitride semiconductor substrate includes a dot-shaped dislocation-concentrated region forming a boundary distinguished from a surrounding region and a low-dislocation region which is a region excluding the dislocation-concentrated region, the nitride semiconductor layer has a laser light waveguide region in the low-dislocation region, and a distance d in a horizontal direction between the laser light waveguide region and the dislocation-concentrated region closest thereto is 40 μm or more, the dislocation-concentrated region is formed by forming a dot-shaped mask on a base, then growing a crystal in a non-masked portion of the base so as to produce, at a boundary between the non-masked and masked portions of the base, a facet slanted relative to a growth direction, and then making the facet surround the dislocation-concentrated region.