Patent ID: 8421107
Filing Date: 2013-04-16
Classification: H01L

Abstract:
1. A group III nitride semiconductor light emitting device comprising: a substrate; a single crystal, group III nitride semiconductor layer formed on top of the substrate; an LED structure formed on top of the group III nitride semiconductor layer, and a buffer layer constituted of polycrystal or single crystal Al wherein the substrate includes a principal plane constituted of a plurality of convex portions, the entire surface thereof being non-parallel to a (0001) C plane of the substrate, and a flat surface configured from the C plane, the convex portions have a base portion width d the group III nitride semiconductor layer is formed by causing a group III nitride semiconductor to grow epitaxially on top of the principal plane of the substrate so as to cover the buffer layer, the full width at half maximum of the X-ray diffraction (XRD) of the (10-10) plane of the group III nitride semiconductor layer ranges from 150 to 180 arcsec, and the full width at half maximum of the X-ray diffraction (XRD) of the (0002) plane of the group III nitride semiconductor layer ranges from 30 to 50 arcsec, and the base portion width d