Patent ID: 8610167
Filing Date: 2013-12-17
Classification: H01L

Abstract:
1. A light-emitting device, comprising: an n-type layer comprising a group III nitride compound semiconductor, an active layer and a p-type layer sequentially laminated on a growth substrate, an n-electrode formed on the n-type layer exposed by etching, and a p-electrode formed on the p-type layer, wherein the n-type layer comprises a structure in which a first n-type layer, a second n-type layer, and a third n-type layer are laminated sequentially in this order from a side near to the growth substrate, wherein an etching marker layer is formed between the second n-type layer and the third n-type layer, and is contacted with the second n-type layer and the third n-type layer, wherein an n-type cladding layer is formed on, and is contacted with, the third n-type layer, wherein the active layer is formed on the n-type cladding layer, wherein a p-type cladding is formed on the active layer, wherein the p-type layer is formed on the p-type cladding layer, wherein at least one of constituent elements of the etching marker layer is different from constituent elements of the third n-type layer are different, wherein an n-type impurity concentration of the second n-type layer is higher than that of the first n-type layer and the third n-type layer, wherein the n-electrode is formed on an exposed portion of the second n-type layer, the exposed portion being formed by etching layers from the p-type layer to the etching marker layer, wherein the third n-type layer comprises GaN, and the etching marker layer comprises at least one of AlGaN, InGaN, and AlGaInN, and wherein the n-type impurity concentration of the first n-type layer and the third n-type layer is 1×10