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. 04, 2012
Filed:
Sep. 21, 2009
Masao Kamiya, Nishikasugai-gun, JP;
Takashi Hatano, Nishikasugai-gun, JP;
Masao Kamiya, Nishikasugai-gun, JP;
Takashi Hatano, Nishikasugai-gun, JP;
Toyoda Gosei Co., Ltd., Nishikasugai-Gun, Aichi-Ken, JP;
Abstract
A method for producing a Group III nitride semiconductor light-emitting device with a face-up configuration including a p-type layer and a transparent electrode composed of ITO is provided in which a p-pad electrode on the transparent electrode and an n-electrode on an n-type layer are simultaneously formed. The p-pad electrode and the n-electrode are composed of Ni/Au. The resultant structure is heat treated at 570° C. and good contact can be established in the p-pad electrode and the n-electrode. The heat treatment also provides a region in the transparent electrode immediately below the p-pad electrode, the region and the p-type layer having a higher contact resistance than that of the other region of the transparent electrode and the p-type layer. Thus, a region of an active layer below the provided region does not emit light and hence the light-emitting efficiency of the light-emitting device can be increased.