Patent ID: 7612362

Claim:
A nitride semiconductor light emitting device comprising: a substrate; a first n-type nitride semiconductor layer formed on said substrate; a light emitting layer formed on said first n-type nitride semiconductor layer; a first p-type nitride semiconductor layer formed on said light emitting layer; a second p-type nitride semiconductor layer formed on said first p-type nitride semiconductor layer; a p-type nitride semiconductor tunnel junction layer formed on said second p-type nitride semiconductor layer, the p-type nitride semiconductor tunnel junction layer comprising p-type nitride semiconductor material including indium; an n-type nitride semiconductor tunnel junction layer formed on said p-type nitride semiconductor tunnel junction layer; a second n-type nitride semiconductor layer formed on said n-type nitride semiconductor tunnel junction layer, the second p-type nitride semiconductor layer comprising p-type nitride semiconductor material including indium; and wherein said p-type nitride semiconductor tunnel junction layer and said n-type nitride semiconductor tunnel junction layer form a tunnel junction, and said p-type nitride semiconductor tunnel junction layer has an indium content ratio higher than an indium content ratio of said second p-type nitride semiconductor layer.