Patent ID: 7554125

Claim:
A multi-layer electrode of a compound semiconductor light emitting device, which is formed on a p-type compound semiconductor layer of the compound semiconductor light emitting device, the multi-layer electrode comprising: a first electrode layer on the p-type compound semiconductor layer which comprises a substance selected from the group consisting of a transparent conductive oxide, a non-conductive oxide, and a nitride; and a second electrode layer on the first electrode layer which comprises a substance selected from the group consisting of a transparent conductive oxide, a non-conductive oxide, and a nitride, wherein, for the first electrode layer and the second electrode layer, independently: the transparent conductive oxide is an oxide of at least one element selected from the group consisting of Zn, Ga, Cd, Mg, Be, Ag, Mo, V, Cu, Ir, Rh, Ru, Co, Mn and La; the non-conductive oxide is an oxide of at least one element selected from the group consisting of Si, Al, Zr, Ti, and Hf; and the nitride is a nitride of at least one element selected from the group consisting of Si, Al, Zr, Ti, and Mo.