Patent ID: 8378381
Filing Date: 2013-02-19
Classification: H01L

Abstract:
1. A semiconductor light emitting device comprising: a substrate; and a light emitting structure having a first semiconductor layer, an active layer and a second semiconductor layer sequentially deposited on the substrate, wherein the active layer includes: a first barrier layer formed on the first semiconductor layer and having an energy band higher than an energy band of a well layer; a second barrier layer formed on the first barrier layer and having an energy band higher than an energy band of the first barrier layer; the well layer formed on the second barrier layer and having an energy band lower than an energy band of the first and second semiconductor layers; a third barrier layer formed on the well layer and having an energy band higher than an energy band of the well layer; and a lattice mismatch relaxation layer formed on the third barrier, the lattice mismatch relaxation layer having a lattice constant greater than a lattice constant of the well layer and smaller than a lattice constant of the second semiconductor layer.