Patent ID: 6844574
Filing Date: 2005-01-18
Classification: H01L,H01S

Abstract:
1. A III-V compound semiconductor having a first layer that comprises a first III-V compound semiconductor expressed by the general formula In u Ga v AL w N where 0≦u≦1, 0≦v≦1, 0≦w≦1, and u+v+w=1, a pattern on said first layer from a material different not only from said first III-V compound semiconductor but also from a second III-V compound semiconductor hereinafter described, and a layer on said first III-V compound semiconductor and said pattern from said second III-V compound semiconductor expressed by the general formula In x Ga y Al z N where 0≦x≦1, 0≦y≦1, 0≦z1, and x+y+z=1, wherein the full width at half maximum of the (0004) reflection X-ray rocking curve of said second III-V compound semiconductor is 700 seconds or less regardless of the direction of X-ray incidence, and the compound semiconductor is formed by a vapor phase epitaxy method.