Patent ID: 7692203

Claim:
A semiconductor light emitting device, comprising: a plurality of semiconductor layers including: a first cladding layer; a second cladding layer; an active layer for generating a light, provided between the first cladding layer and the second cladding layer; and a light extract layer constituting a main surface at a side of the first cladding layer; a first electrode for partially covering the light extract layer; a second electrode for covering a surface opposite to the main surface; a reflective metal film for reflecting a light provided between the second cladding layer and the second electrode; an oxide layer adjacent to an active layer side of the reflective metal film; and an ohmic contact portion in a part of the oxide layer, wherein the light extract layer comprises a plurality of layers having different composition ratios, an irregularity is formed penetrating a plurality of the layers to rough the main surface, the irregularity comprises irregular surfaces on a side face of a plurality of the layers and different in inclination between two adjacent layers of a plurality of the layers, and a total film thickness of the light extract layer on the first cladding layer is from 1000 nm to 3000 nm.