Patent ID: 8895956

Claim:
A semiconductor light emitting device comprising: a first semiconductor layer of an n-type; a second semiconductor layer of a p-type; and a light emitting layer provided between the first semiconductor layer and the second semiconductor layer, and including at least two barrier layers separated by a well layer, the barrier layers including a nitride semiconductor, the well layer being provided between the barrier layers and including a nitride semiconductor containing In, the barrier layers and the well layer stacked in a first direction from the second semiconductor layer toward the first semiconductor layer, the well layer including a p-side interface part and an n-side interface part, the n-side interface part being provided between the p-side interface part and the first semiconductor layer, the p-side interface part being provided adjacent to one of the barrier layers, the one of the barrier layers being disposed between the well layer and the second semiconductor layer, the one of the barrier layers physically contacting the well layer, the p-side interface part having a first concentration of In, and the n-side interface part being provided adjacent to the other one of the barrier layers, the other one of the barrier layers being disposed between the well layer and the first semiconductor layer, the other one of the barrier layers physically contacting the well layer, the n-side interface part having a second concentration of In, a first variation of the first concentration in a first plane perpendicular to the first direction being not more than a second variation of the second concentration in a second plane perpendicular to the first direction.