Patent ID: 8134167

Claim:
A method for manufacturing a light emitting device, the method comprising the steps of: forming a buffer layer; forming an N-type gallium nitride layer on the buffer layer; forming a super lattice structure including InGaN on the N-type gallium nitride layer, wherein the super lattice structure is not doped with an n-type impurity, wherein the super lattice structure including InGaN includes a plurality of first InGaN layers and a plurality of second InGaN layers, wherein each of the plurality of first InGaN layers has an In composition less than an In composition of each of the plurality of second InGaN layers, and wherein the first InGaN layer is directly on the N-type gallium nitride layer; forming an active layer on the super lattice structure and including an InGaN/InGaN structure of a multi-quantum well structure, wherein the active layer is directly on one of the plurality of second InGaN layers; and forming a P-type gallium nitride layer on the active layer, wherein the super lattice structure including InGaN has a plurality of pits formed thereon and wherein a non-zero number of the plurality of pits is 50 or less per area of 5 μm×5 μm, and wherein the buffer layer is grown at a first temperature, wherein the first InGaN layer of the super lattice structure including InGaN is grown at a second temperature higher than the first temperature, wherein the second InGaN layer of the super lattice structure including InGaN is grown at a third temperature higher than the first temperature and lower than the second temperature, and wherein the active layer is grown at a fourth temperature of 600˜800° C. and the fourth temperature is lower than the second temperature and the third temperature.