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:
Feb. 25, 2014
Filed:
Aug. 31, 2007
Tzong-liang Tsai, Hsinchu, TW;
Yu-chu LI, Taichung, TW;
Chiung-chi Tsai, Tanzi Shiang, TW;
Huga Optotech Inc., Taichung, TW;
Abstract
The present invention provides a light emitting device, which includes a transparent substrate, an epitaxial stack structure having a first portion and a second portion on the transparent substrate, a II/V group compound contact layer on the first portion of the epitaxial stack structure, a nitride-crystallized layer on the II/V group compound contact layer, a transparent conductive layer covering the nitride-crystallized layer, a first electrode on a portion of the transparent conductive layer, and a second electrode on the second portion of the epitaxial stack structure and structurally separated from the structure on the first portion of the epitaxial stack structure. The nitride-crystallized layer may help increase the external quantum efficiency of the light emitting device, thereby the light emitting efficiency of the light emitting device may also be improved.