Patent ID: 9570654
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. A nitride light-emitting diode, comprising: a substrate having a surface with sub-micro patterns, including a growth region and a non-growth region; a growth blocking layer, formed in the non-growth region of the substrate for blocking epitaxial growth in the non-growth region of the substrate; a light-emitting epitaxial layer, comprising an n-type layer, a light-emitting layer, and a p-type layer, formed in the growth region of the substrate, extending to the non-growth region through lateral epitaxy and covering the growth blocking layer; wherein: a refractive index of the growth blocking layer is less than that of the light-emitting epitaxial layer, and the growth blocking layer forms undulating morphology along the sub-micro patterns of the substrate, thereby increasing a light extraction interface of light-emitting diode and generating a refractive index difference between the light-emitting epitaxial layer and the light extraction interface; and an angle α between an undulated surface and a plane surface of the growth blocking layer is formed to be 40°-70° to thereby increase light scattering probability and thereby improving the light extraction efficiency.