Patent ID: 8143614

Claim:
A nitride semiconductor light processing device formed of a hexagonal or cubic crystal system, comprising: a substrate; a light emitting layer comprising a quantum well structure including quantum well layers and barrier layers laminated alternately; at least one electron blocking layer, sandwiched in between a first waveguide layer and a light emitting layer; wherein said light emitting layer and said electron blocking layer are sandwiched in between the first waveguide layer and a second waveguide layer; wherein one or more of said quantum well layers comprises a nitride semiconductor material; wherein one or more of said barrier layers comprises a nitride semiconductor material; wherein said electron blocking layer is formed of a layer containing Sb and a plurality of group III and V elements; wherein the molar fraction of Sb is more than 0.01% and less than 35% of the total group V elements in said electron blocking layer; and wherein the valence band edge of said electron blocking layer is, partially or fully, aligned with a valence band edge of either said barrier layer or said waveguide layer.