Patent ID: 8816322
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A Group III nitride semiconductor light-emitting device comprising: an underlying layer formed of a Group III nitride semiconductor; a strain relaxation layer formed on the underlying layer; and a light-emitting layer formed on the strain relaxation layer, wherein the light-emitting layer is formed by depositing a barrier layer and an In-containing well layer; the strain relaxation layer is formed of a superlattice layer including three or more layer units, each unit including at least an InGaN layer and a GaN layer; and among the layer units, a layer unit more proximal to the light-emitting layer includes an InGaN layer having a higher In compositional proportion, and the layer unit most proximal to the light-emitting layer includes an InGaN layer having an In compositional proportion which is 70% to 100% of the In compositional proportion of the well layer of the light-emitting layer.