Patent ID: 9263639
Filing Date: 2016-02-16
CPC Classification: H01L

Claim Text:
1. A Group III nitride semiconductor light-emitting device having a plurality of Group III nitride semiconductor layers on a surface of Group III nitride semiconductor substrate, the light-emitting device comprising: an n-type contact layer on which an n-electrode is formed, a light-emitting layer, an n-type cladding layer formed between the light-emitting layer and the n-type contact layer; wherein the n-type cladding layer has a structure of at least two layers including a first n-type cladding layer closer to the light-emitting layer and a second n-type cladding layer farther from the light-emitting layer than the first n-type cladding layer; and the first n-type cladding layer has a Si concentration higher than that of the second n-type cladding layer, and the first n-type cladding layer has a thickness smaller than that of the second n-type cladding layer.