Patent ID: 9287367
Filing Date: 2016-03-15
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first conductive type semiconductor layer comprising a first lower conductive type semiconductor layer and a first upper conductive type semiconductor layer; V-pits passing through at least one portion of the first upper conductive type semiconductor layer; a second conductive type semiconductor layer placed over the first conductive type semiconductor and filling the V-pits; and an active layer interposed between the first and second conductive type semiconductor layers, the V-pits passing through the active layer, wherein the first upper conductive type semiconductor layer has a higher defect density than the first lower conductive type semiconductor layer and comprises a V-pit generation layer comprising starting points of the V-pits, wherein the first upper conductive type semiconductor layer further comprises a super-lattice layer placed over the V-pit generation layer, and wherein the first upper conductive type semiconductor layer further comprises a low-temperature growth doping layer interposed between the V-pit generation layer and the superlattice layer.