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. 09, 2016
Filed:
Feb. 24, 2014
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventor:
Akira Tanaka, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 33/32 (2010.01); H01L 33/14 (2010.01); H01L 33/38 (2010.01); H01L 33/50 (2010.01); H01L 33/20 (2010.01);
U.S. Cl.
CPC ...
H01L 33/32 (2013.01); H01L 33/14 (2013.01); H01L 33/382 (2013.01); H01L 33/20 (2013.01); H01L 33/50 (2013.01);
Abstract
A light emitting device includes a first layer of a first conductivity type, a second layer of a second conductivity type, a light emitting layer between the first and second layers, a first electrode disposed on a surface of the first layer, and a second electrode disposed on a surface of the second layer and electrically insulated from the first layer. The first layer has first and second regions, each of which contacts the first electrode. A dopant concentration in the first region is less than a dopant concentration in the second region.