Patent ID: 7120181
Filing Date: 2006-10-10
Classification: B82Y,H01S

Abstract:
1. A semiconductor laser device comprising: a first nitride based semiconductor layer including a light emitting layer and containing at least one of indium, gallium, aluminum, boron and thallium; a ridge portion formed in a region having a predetermined width on said first nitride based semiconductor layer, having an upper surface having a first width and a side surface, and containing at least one of indium, gallium, aluminum, boron and thallium; a current blocking layer formed on said first nitride based semiconductor layer and on a region from the side surface of said ridge portion to the upper surface thereof by a transverse growth technique, and having an opening having a second width smaller than said first width on the upper surface of said ridge portion; and a second nitride based semiconductor layer formed on the upper surface of said ridge portion and containing at least one of indium, gallium, aluminum, boron and thallium, wherein an end portion of said current blocking layer is in contact with a part of said second nitride based semiconductor layer formed on the upper surface of said ridge portion, wherein said first nitride based semiconductor layer comprises an n-type cladding layer, said light emitting layer, and a p-type cladding layer, and said ridge portion comprises a part of said p-type cladding layer.