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:
Jul. 04, 2017
Filed:
Jul. 10, 2015
Epistar Corporation, Hsinchu, TW;
Po-Shun Chiu, Hsinchu, TW;
De-Shan Kuo, Hsinchu, TW;
Jhih-Jheng Yang, Hsinchu, TW;
Jiun-Ru Huang, Hsinchu, TW;
Jian-Huei Li, Hsinchu, TW;
Ying-Chieh Chen, Hsinchu, TW;
Zi-Jin Lin, Hsinchu, TW;
EPISTAR CORPORATION, Hsinchu, TW;
Abstract
A light-emitting device is disclosed. The light-emitting diode device includes a substrate, comprising an upper surface, a lower surface and a plurality of side surfaces; and a semiconductor stack formed on the upper surface of the substrate; wherein the plurality of side surfaces comprises: a first region, adjacent to the upper surface and having a first surface roughness; a second region, comprising one or a plurality of textured areas substantially parallel to the upper surface and/or the lower surface in a side view, wherein the textured area is composed of a plurality of textured stripes and has a second surface roughness; and a third region, having a third surface roughness and being between the first region and the second region, and/or between the plurality of textured areas; wherein the first surface roughness is smaller than the second surface roughness, and the third surface roughness is smaller than the first surface roughness.