Patent ID: 9601657
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. A light-emitting device comprising: a substrate having a first refractive index, a top surface, and a bottom surface; an intermediate layer formed on the bottom surface and having a second refractive index; a first semiconductor layer comprising a third refractive index and a side wall; a transparent bonding layer formed between the intermediate layer and the first semiconductor layer, and comprising a material absent in the intermediate layer and the first semiconductor layer; an ohmic contact part formed between the transparent bonding layer and the first semiconductor layer; a light-emitting stack formed on a surface of the first semiconductor layer opposite to the substrate and configured to emit a light passing through the top surface; and a first electrode formed on a recess portion of the first semiconductor layer, wherein in a cross-sectional view of the light-emitting device, the first electrode has two parts and the light-emitting stack is arranged between the two parts of the first electrode, wherein the second refractive index is between the first refractive index and the third refractive index.