Patent ID: 6956884

Claim:
A semiconductor light emitting device comprising: an active layer composed of a nitride based semiconductor; a cladding layer formed on said active layer, composed of a nitride based semiconductor of a first conductivity type, and having a flat portion and a ridge portion formed on the flat portion; a first current blocking layer formed on said flat portion and on sidewalls of said ridge portion of said cladding layer and composed of a high-resistive nitride based semiconductor containing impurities; and a second current blocking layer formed on and above said first current blocking layer and composed of a nitride based semiconductor of a second conductivity type opposite to said first conductivity type; wherein the cladding layer is composed of AlGaN; wherein the first current blocking layer is composed of AlGaN having a larger composition ratio than that of the cladding layer; wherein said impurities contain at least one of zinc, beryllium, calcium, and carbon; wherein said first current blocking layer has a resistance value of not less than 1.5 Ωcm.