Patent ID: 8927348
Filing Date: 2015-01-06
Classification: H01L

Abstract:
1. A method of manufacturing a group-III nitride semiconductor light-emitting device in which a semiconductor layer is formed on a substrate by sequentially laminating an n-type semiconductor layer, an emission layer and a p-type semiconductor layer, which are made of a group-III nitride semiconductor, the method comprising: an epitaxial step of epitaxially growing the group-III nitride semiconductor on a first main surface of the substrate, to form the semiconductor layer so as to cover the first main surface; a masking step of forming a protective film on the semiconductor layer; a semiconductor layer removal step of irradiating a cutting expectation line for dividing the substrate into a plurality of chips with a laser from the side on which the semiconductor layer and the protective film of the substrate are formed, to remove the protective film and the semiconductor layer and expose the substrate; a grinding step of grinding a second main surface of the substrate, to reduce a thickness of the substrate; a polishing step of polishing the substrate after the grinding step; a laser processing step of irradiating the cutting expectation line with a laser, to provide processing marks to the inside of the substrate; and a division step of dividing the substrate along the processing marks and the cutting expectation line, to create a plurality of chips while forming a division surface of the substrate to have a rough surface, wherein the first main surface of the substrate comprises a flat surface of a C-plane and a plurality of raised portions formed on the C-plane.