Patent ID: 7172429

Claim:
A method of manufacturing a semiconductor light emitting device having an active layer with a quantum confined structure including layers of InGaN, the method comprising: forming under a plurality of different formation conditions a plurality of respective quantum confined structures, each of the quantum confined structures including a plurality of alternating layers of InGaN containing respective proportions of In, Ga, and N, and measuring photoluminescence peak intensities of each of the plurality of quantum confined structures at 300Â° K and 5Â° K to identify the formation conditions producing quantum confined structures having a ratio of peak photoluminescence intensities at 300Â° K and 5Â° K no larger than 0.1; and manufacturing a semiconductor light emitting device by successively forming on a substrate opposite conductivity type first and second cladding layers of AlGaN and, between depositing the first and second cladding layers, forming a layer including a quantum confined structure including a plurality of layers of InGaN using the formation conditions identified as producing a quantum confined structure having a ratio of peak photoluminescence intensities at 300Â° K and 5Â° K no larger than 0.1.