Patent ID: 8592841

Claim:
A nitride semiconductor light emitting device comprising: at least a substrate; a buffer layer formed on said substrate; an n-type contact layer doped with an n-type impurity for forming an n-electrode, the n-type contact layer being made of a single layer and having a thickness not less than 0.1 μm and not more than 20 μm; an active layer where electrons and holes are recombined; and a p-type contact layer for forming a p-electrode, each layer being made of nitride semiconductor, wherein said n-type contact layer has a first surface on which a first undoped nitride semiconductor layer is directly formed and a second surface on which a second undoped nitride semiconductor layer is directly formed to make a three-layer laminated structure without any other intermediate layers, said three-layer laminated structure being situated between said buffer layer and said active layer.