Patent ID: 8735925
Filing Date: 2014-05-27
Classification: H01L

Abstract:
1. A semiconductor light emitting device comprising: a substrate; at least one metal layer provided on the substrate; a stack film including a p-type nitride semiconductor layer provided on the at least one metal layer, an active layer provided on the p-type nitride semiconductor layer and including a multiquantum well structure of a nitride semiconductor, and an n-type nitride semiconductor layer provided on the active layer; an n-electrode connected to the n-type nitride semiconductor layer; a p-electrode connected to the p-type nitride semiconductor layer; and a protection film protecting an outer circumferential region of an upper face of the n-type nitride semiconductor layer, side faces of the stack film, and a region of an upper face of the at least one metal layer other than a region in contact with the p-type nitride semiconductor layer, wherein the stack film has a tapered shape in cross-section, with an area of a film plane gradually increasing from the n-type nitride semiconductor layer toward the p-type nitride semiconductor layer, and concavities and convexities are formed in a region of the upper face of the n-type nitride semiconductor layer, and wherein the at least one metal layer comprises: a first metal layer provided between the substrate and the p-type nitride semiconductor layer; and a second metal layer provided between the substrate and the first metal layer, and the second metal layer having a minimum diameter that is smaller than a minimum diameter of the first metal layer but is larger than a minimum diameter of the p-type nitride semiconductor layer.