Patent ID: 8183555

Claim:
A semiconductor light emitting device, comprising: a first semiconductor layer including a first type dopant; a second semiconductor layer including the first type dopant on the first semiconductor layer; an active layer on the second semiconductor layer, wherein the active layer includes a multi-quantum well structure having a plurality of quantum barrier layers and a plurality of quantum well layers; a third semiconductor layer including a second type dopant on the active layer; and a fourth semiconductor layer including the second type dopant on the third semiconductor layer, wherein the first semiconductor layer has a composition equation of Al Y (Ga x In 1-x ) 1-Y N (X=1,0<y<1) and the fourth semiconductor layer has a composition equation of Al Y (Ga x In 1-x ) 1-Y N (X=1,0<y<1), and wherein the plurality of quantum well layers of the active layer include an InAlGaN layer.