Patent ID: 8698125
Filing Date: 2014-04-15
Classification: H01L

Abstract:
1. A light emitting device comprising: a first conductive type semiconductor layer including an n-type dopant; an active layer on the first conductive type semiconductor layer; a roughness pattern disposed on the active layer, a first portion of the active layer exposed by the roughness pattern and a second portion of the active layer covered by the roughness pattern; and a second conductive type semiconductor layer including a p-type dopant on the roughness pattern and the active layer, the second conductive type semiconductor layer including a metal oxide semiconductor, wherein a first portion of the second conductive type semiconductor layer contacts an upper surface of the roughness pattern, wherein a second portion of the second conductive type semiconductor layer contacts the first portion of the active layer exposed by the roughness pattern, wherein an entire region of the roughness pattern is located at a position higher than an entire region of the active layer, wherein the active layer includes a nitride-based material different from the second conductive type semiconductor layer, and wherein the roughness pattern contacts a top surface of the active layer.