Patent ID: 9006776
Filing Date: 2015-04-14
Classification: F21K,F21Y,H01L

Abstract:
1. A semiconductor light emitting device comprising: a light emitting structure including a first conductive semiconductor layer, a second conductive semiconductor layer under the first conductive semiconductor layer, and an active layer between the first and second conductive semiconductor layers; an electrode connected to the first conductive semiconductor layer; a first conductive layer disposed under the second conductive semiconductor layer; a second conductive layer disposed under the first conductive layer; a protective layer disposed on an outer portion of a lower surface of the second conductive semiconductor layer and disposed outward further than the first conductive layer; and a third conductive layer disposed under the second conductive layer and the protective layer; a support member disposed under the third conductive layer; and a buffer layer disposed between the protective layer and the third conductive layer and includes a metallic material, wherein the protective layer includes a first opening, a first portion contacted with the lower surface of the second conductive semiconductor layer, and a second portion disposed outwardly further than the first portion, wherein the first conductive layer is disposed in the first opening of the protective layer, wherein the second portion of the protective layer and the buffer layer is overlapped with the third conductive layer in a vertical direction, and wherein the buffer layer is disposed outwardly further than a lateral surface of the first conductive layer; and wherein the protective layer has a thickness of 0.02 μm to 5 μm, wherein the buffer layer has a thickness thinner than a thickness of the protective layer or has a thickness in a range of 1 μm to 10 μm.