Patent ID: 7132695

Claim:
A nitride based light emitting diode (LED) comprising: a substrate; a first conductivity contact layer formed over the substrate, the first conductivity contact layer being made of Al x1 In y1 Ga 1−(x1+y1) N (0≦x1≦1; 0≦y1≦1; and 0≦x1+y1≦1); a light emitting layer formed over the first conductivity nitride based contact layer; a second conductivity contact layer formed over the light emitting layer, the second conductivity contact layer being made of Al x2 In y2 Ga 1−(x2+y2) N (0≦x2≦1; 0≦y 2≦1; and 0≦x2+y2≦1); a nitride based dual dopant contact layer formed over the second conductivity contact layer, the nitride based dual dopant contact layer comprising at least a p-type impurity and an n-type impurity wherein a concentration of the n-type impurity being higher than a concentration of the p-type impurity; and a transparent conductive oxide layer formed over the nitride based dual dopant contact layer.