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:
Dec. 07, 2010
Filed:
Sep. 05, 2006
Hironao Shinohara, Ichihara, JP;
Hisayuki Miki, Ichihara, JP;
Noritaka Muraki, Ichihara, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
It is an object of the present invention to provide a gallium nitride-based compound semiconductor light-emitting device that is excellent in light output efficiency and needs only a low driving voltage (Vf). The inventive gallium nitride-based compound semiconductor light-emitting device includes an n-type semiconductor layer, a light-emitting layer and a p-type semiconductor layer formed of a gallium nitride-based compound semiconductor and stacked in this order on a substrate, and positive and negative electrodes so arranged as to be in contact with the p-type semiconductor layer and the n-type semiconductor layer, respectively, wherein a region in which a p-type impurity and hydrogen atoms are co-present exists in the p-type semiconductor layer in contact with the positive electrode, and at least a portion, which is in contact with the p-type semiconductor layer, of the positive electrode, is formed of an n-type electro-conductive light transmitting material.