Patent ID: 8912565
Filing Date: 2014-12-16
Classification: H01L

Abstract:
1. A light emitting device, comprising: a light emitting structure including a first semiconductor layer, a second semiconductor layer disposed on the first semiconductor layer, an active layer between the first semiconductor layer and the second semiconductor layer, and a plurality of electrodes, the first semiconductor layer having a step-down region such that one of the plurality of electrodes is placed thereon; and a growing substrate disposed under the light emitting structure and including a first portion having a flat top surface, a second portion having a flat bottom surface and disposed under the first portion, and a side portion disposed between the first portion and the second portion, an area of the flat top surface of the first portion being larger than an area of the flat bottom surface of the second portion, wherein a side surface of the side portion of the growing substrate is inclined with reference to the flat bottom surface of the second portion so as to help light emitted from the light emitting structure get out of the growing substrate, wherein the area of the flat top surface of the first portion is substantially the same as a largest flat surface area of the light emitting structure, and wherein the first portion of the growing substrate has a substantially vertical side surface with reference to the flat bottom surface of the second portion such that the area of the flat top surface of the first portion is substantially the same as an area of a bottom surface of the first portion.