Patent ID: 8314436
Filing Date: 2012-11-20
Classification: H01L

Abstract:
1. A light emitting device, comprising: a substrate having an upper surface having irregularly uneven stacked structures protruding in an upward direction from the substrate; a first conductive semiconductor layer on the substrate and having an irregularly uneven lower surface facing the upper surface of the substrate; an active layer on the first conductive semiconductor layer; and a second conductive semiconductor layer on the active layer, wherein the stacked structures have a lower layer partially formed with the substrate and stacked upper layers on the lower layer, wherein the stacked upper layers have different materials from each other, wherein the lower layer of each stacked structure is separate from each other, and the stacked upper layers cover the lower layer of the stacked structures continuously, wherein the substrate includes flat portions and groove portions formed at between the flat portions, and wherein the lower layer is only stacked on the flat portions of the substrate.