Patent ID: 7876798
Filing Date: 2011-01-25
Classification: B82Y,H01S

Abstract:
1. A nitride semiconductor laser device formed by growing a group III nitride semiconductor multilayer structure on a substrate containing no Al, wherein the group III nitride semiconductor multilayer structure forms a structure including an n-type semiconductor layer, a p-type semiconductor layer, and a light emitting layer held between the n-type semiconductor layer and the p-type semiconductor layer, the n-type semiconductor layer includes an n-type cladding layer containing Al and an n-type guide layer having a smaller band gap than the n-type cladding layer, the p-type semiconductor layer includes a p-type cladding layer containing Al and a p-type guide layer having a smaller band gap than the p-type cladding layer, and a removal region is formed by partially removing the layers containing Al in the group III nitride semiconductor multilayer structure from the substrate, wherein the group III nitride semiconductor multilayer structure is removed until the substrate is exposed in the removal region; wherein the n-type semiconductor layer is formed by successively stacking: an n-type contact layer, an n-type cladding layer, and an n-type guide layer from a side closer to the substrate; and the p-type semiconductor layer is formed by successively stacking: a p-type guide layer, a p-type cladding layer, and a p-type contact layer from a side closer to the light emitting layer; wherein the n-type contact layer and the p-type contact layer have a composition of Al—In—Ga—N, the n-type cladding layer and the p-type cladding layer have a composition of Al—Ga—N, and the n-type guide layer and the p-type guide layer have a composition of GaN.