Patent ID: 8575593
Filing Date: 2013-11-05
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: first and second conductivity-type semiconductor layers; and an active layer disposed between the first and second conductivity-type semiconductor layers and having a structure in which a quantum barrier layer and a quantum well layer are alternately disposed, wherein the quantum well layer includes In the quantum barrier layer includes first and second regions disposed in order toward the first conductivity-type semiconductor layer such that no quantum well layer is disposed between the first region and the second region, wherein, in the first region, the content of indium (In) is reduced at a first slope in a direction toward the second conductivity-type semiconductor layer and, in the second region, the content of indium (In) is increased at a second slope in a direction toward the second conductivity-type semiconductor layer, and the quantum barrier layer includes third and fourth regions interposed between the first and second regions and disposed in order toward the first conductivity-type semiconductor layer, wherein, in the third region, the content of indium (In) is reduced at a third slope that has an absolute value smaller than an absolute value of the first slope, in a direction toward the second conductivity-type semiconductor layer, and in the fourth region, the content of indium (In) is increased at a fourth slope that has an absolute value smaller than an absolute value of the second slope, in the direction toward the second conductivity-type semiconductor layer.