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. 21, 2017
Filed:
Feb. 19, 2013
Applicant:
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Inventors:
Makoto Agatani, Osaka, JP;
Makoto Matsuda, Osaka, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/40 (2010.01); H01L 33/62 (2010.01); H01L 25/075 (2006.01);
U.S. Cl.
CPC ...
H01L 33/40 (2013.01); H01L 33/62 (2013.01); H01L 25/0753 (2013.01); H01L 2924/0002 (2013.01); H01L 2933/0016 (2013.01);
Abstract
A light emission device includes: an insulating substrate; a light emitting section including a plurality of LED chips mounted on the insulating substrate; and land electrodes for supplying power to the LED chips. At least a surface of each of the land electrodes is made of a conductive material which is harder than Au and Ag and which has sulfurization resistance to such an extent that secures conduction of each land electrode when a current in a working current range is applied on the land electrode.