Patent ID: 7903707
Filing Date: 2011-03-08
Classification: B82Y,H01L,H01S

Abstract:
1. A nitride semiconductor light-emitting device, comprising: a single-layer substrate; and a nitride semiconductor layer laid directly on a top surface of the substrate, the nitride semiconductor layer having a ridge portion serving as a laser light waveguide region, wherein the substrate has a defect-concentrated region and a low-defect region corresponding to a region other than the defect-concentrated region, the defects in the defect-concentrated region extending from the top surface of the substrate and into the thickness direction of the substrate, the substrate has an engraved region that includes the defect-concentrated region, the engraved region engraved so as to be located lower than the low-defect region with respect to the top surface of the substrate, the engraving depth of the engraved region is 0.5 μm or more but 50 μm or less with respect to the top surface of the substrate, and wherein the ridge portion is formed over a non-engraved, low-defect, region and is so formed as to be located 5 μm or more away, parallel to the top surface of the substrate, from the nearest edge of the engraved region.