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. 19, 2019
Filed:
Jan. 23, 2017
Epistar Corporation, Hsinchu, TW;
Yen-Tai Chao, Hsinchu, TW;
Sen-Jung Hsu, Hsinchu, TW;
Tao-Chi Chang, Hsinchu, TW;
Wei-Chih Wen, Hsinchu, TW;
Ou Chen, Hsinchu, TW;
Chun-Hsiang Tu, Hsinchu, TW;
EPISTAR CORPORATION, Hsinchu, TW;
Abstract
A light-emitting device including a substrate having a top surface, a side surface and a roughed surface between the top surface and the side surface, wherein the top surface includes a first portion and a second portion; a first semiconductor stack including a first upper surface and a first side wall, wherein the first semiconductor stack is on the second portion and exposes the first portion; a second semiconductor stack including a second side wall, wherein the second semiconductor stack is on the first upper surface and exposes an exposing portion of the first upper surface; wherein the first side wall and the first portion of the top surface form an acute angle α between thereof, and the second side wall and the exposing portion of the first upper surface form an obtuse angle β between thereof; and wherein the roughed surface is connected to the top surface.