Patent ID: 7459728

Claim:
A semiconductor light emitting device comprising: a crystal layer comprising: a first conductive type layer, an active layer, and a second conductive type layer formed on a crystal growth layer, wherein the second conductive type is different from the first conductive type and the active layer is between the first conductive type layer and the second conductive type layer; wherein the crystal layer has an approximately hexagonal pyramid shape comprising a plurality of tilt crystal planes that are tilted from a principal plane of a substrate and that intersect at a vertex of the approximately hexagonal pyramid shape, and wherein the first conductive type layer, the active layer, and the second conductive extend within planes parallel to the tilt crystal planes; an electrode formed on only a partial area of a first tilt crystal plane of the plurality of tilt crystal planes; wherein said electrode is formed in a region on the first tilt crystal plane having better crystallinity as compared to both a region of said first tilt crystal plane in the vicinity of the vertex and a region of said first tilt crystal plane in the vicinity of a bottom surface of the device; and wherein the light emitting device is constructed such that at least some light generated by the crystal layer is reflected by a surface of the tilt crystal planes and emerges from the device through a light emergence plane on the bottom surface of the device.