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:
Apr. 08, 2014
Filed:
Mar. 22, 2012
Chi-wei LU, Taoyuan County, TW;
Meng-lun Tsai, Taoyuan County, TW;
Chi-Wei Lu, Taoyuan County, TW;
Meng-Lun Tsai, Taoyuan County, TW;
Epistar Corporation, Hsinchu, TW;
Abstract
A light-emitting device is disclosed. The light-emitting device comprises an epitaxial structure comprising a lower cladding layer of first conductivity type, an active layer comprising InGaN or AlGaInN on the lower cladding layer, and an upper cladding layer of second conductivity type on the active layer; a tunneling structure on the epitaxial structure comprising a first tunneling layer of second conductivity type with a doping concentration greater than 6×10/cmon the upper cladding layer, and a second tunneling layer of first conductivity type with a doping concentration greater than 6×10/cmon the first tunneling layer; and a current spreading layer of first conductivity type comprising AlInN on the tunneling structure.