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:
Mar. 22, 2022
Filed:
Jan. 22, 2020
Epistar Corporation, Hsinchu, TW;
Li-Ming Chang, Hsinchu, TW;
Tzung-Shiun Yeh, Hsinchu, TW;
Chien-Fu Shen, Hsinchu, TW;
Wen-Hsiang Lin, Hsinchu, TW;
Pei-Chi Chiang, Hsinchu, TW;
Yi-Wen Ku, Hsinchu, TW;
EPISTAR CORPORATION, Hsinchu, TW;
Abstract
A light-emitting device, includes: a substrate, including a base with a main surface; and a plurality of protrusions on the main surface, wherein the protrusion and the base include different materials; and a semiconductor stack on the main surface, including a side wall, and wherein an included angle between the side wall and the main surface is an obtuse angle; wherein the main surface includes a peripheral area surrounding the semiconductor stack, and the peripheral area is devoid of the protrusion formed thereon.