Patent ID: 7173287
Filing Date: 2007-02-06
Classification: H01L

Abstract:
1. A semiconductor light-emitting device made of a group III-nitride compound semiconductor expressed as Al x Ga y In 1−x−y N (where 0≦x≦1, 0≦y≦1, and 0≦x+y≦1), the semiconductor light-emitting device comprising: a substrate made of SiC; a semiconductor layer which is placed above the substrate and has a light-emitting region; a multi-layered reflective layer which is placed between the substrate and the semiconductor layer and which reflects light produced in the light-emitting region; and a phase matching layer which is placed between the substrate and the multi-layered reflective layer and which reflects light produced in the light-emitting region and matches a phase of light reflected from a lower boundary surface of the multi-layered reflective layer and a phase of light reflected from a lower boundary surface of the substrate among light produced in the light-emitting region, wherein a thickness of the phase matching layer is set so that a quantity of interfering light produced by the interference of light reflected from the lower boundary surface of the multi-layered reflective layer, light reflected from a lower boundary surface of the phase matching layer, and light reflected from the lower boundary surface of the substrate among light produced in the light-emitting region is locally maximized when the substrate has a predetermined thickness.