Patent ID: 7906795

Claim:
A light-emitting device comprising: a semiconductor light-emitting stack, comprising a light emitting area; at least an electrode formed on the semiconductor light-emitting stack, wherein the electrode comprises a current injected portion and an extension portion wherein the extension portion has a first part and a second part, wherein the extension portion comprises a first branch radiating from the current injected portion and a second branch diverging and extending from the first branches, and wherein the second part is part of the second branch; a first current blocking structure formed between the current injected portion and the semiconductor light-emitting stack, and formed between the first part of the extension portion and the semiconductor light-emitting stack; and an electrical contact structure formed between the second part of the extension portion and the semiconductor light-emitting stack, wherein the first part of the extension portion is closer to the current injected portion than the second part of the extension portion is, and wherein the ratio of the electric contact structure and the light emitting area is between 3% to 15%.