Patent ID: 9041048
Filing Date: 2015-05-26
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: a first conductive type semiconductor layer; a second conductive type semiconductor layer disposed on a top surface of the first conductive type semiconductor layer; an active layer disposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a first un-doped semiconductor layer under a bottom surface of the first conductive type semiconductor layer; a second un-doped semiconductor layer disposed between the first conductive type semiconductor layer and the first un-doped semiconductor layer; and a diffusion semiconductor structure comprising a first diffusion semiconductor structure and a second diffusion semiconductor structure in the first un-doped semiconductor layer, wherein the first diffusion semiconductor structure is spaced from the second diffusion semiconductor structure, wherein a first portion of the first un-doped semiconductor layer is disposed between a bottom surface of the diffusion semiconductor structure and a bottom surface of the first un-doped semiconductor layer, wherein a second portion of the first un-doped semiconductor layer is connected with the first portion of the first un-doped semiconductor layer and is disposed between the first diffusion semiconductor structure and the second diffusion semiconductor structure, wherein a top surface of the diffusion semiconductor structure and a top surface of the second portion of the first un-doped semiconductor layer are in contact with a bottom surface of the second un-doped semiconductor layer, and wherein the first un-doped semiconductor layer is formed of a single layer having the first and second portions.