The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
Sep. 08, 2022
Focus Lightings Tech Co., Ltd., Jiangsu, CN;
Xiaoxiong Lin, Jiangsu, CN;
Yufei Cao, Jiangsu, CN;
Zhiqiang Chu, Jiangsu, CN;
Wenguang Huang, Jiangsu, CN;
Shuai Wang, Jiangsu, CN;
FOCUS LIGHTINGS TECH CO., LTD., Jiangsu, CN;
Abstract
The application discloses a chip fabrication process for improving LED chip light extraction efficiency and an LED chip. The LED chip comprises: a patterned sapphire substrate including a sapphire substrate and an oxide layer provided on the sapphire substrate; an LED chip epitaxial wafer provided on a patterned sapphire substrate, and the outer periphery of the LED chip epitaxial wafer is provided with an isolation groove; the LED chip epitaxial wafer comprises an N-type gallium nitride layer and a P-type gallium nitride layer, wherein the N-type gallium nitride layer is provided on a patterned sapphire substrate, the P-type gallium nitride layer is provided on the N-type gallium nitride layer, and the isolation groove is a multi-layer triangular cone, a semi-circle or a sphere.