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. 06, 2012
Filed:
Apr. 20, 2009
Lin-chieh Kao, Caotun Town, TW;
Shu-ying Yang, Gangshan Town, TW;
Lin-Chieh Kao, Caotun Town, TW;
Shu-Ying Yang, Gangshan Town, TW;
Huga Optotech, Inc., Taichung, TW;
Abstract
The invention discloses a light-emitting diode which includes a substrate on which a first conducting-type semiconductor layer, an illuminating layer and a second conducting-type semiconductor layer are formed sequentially, a transparent insulating material, a first transparent conducting layer, and a second transparent conducting layer. The top surface of the first conducting-type semiconductor layer includes a first region and a second region surrounded by the first region. Plural pillar-like holes are formed at the first region and protrude into the first conducting-type semiconductor layer. The transparent insulating material fills up the holes. The first transparent conducting layer is formed on the second conducting-type semiconductor layer, and the second transparent conducting layer is formed on the top surface of the transparent insulating material and on the first region.