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:
Sep. 10, 2013
Filed:
Feb. 02, 2011
Yukie Nishikawa, Fukuoka-ken, JP;
Takashi Kataoka, Kanagawa-ken, JP;
Hironori Yamasaki, Fukuoka-ken, JP;
Hisashi Mori, Fukuoka-ken, JP;
Kazunari Yabe, Fukuoka-ken, JP;
Yukie Nishikawa, Fukuoka-ken, JP;
Takashi Kataoka, Kanagawa-ken, JP;
Hironori Yamasaki, Fukuoka-ken, JP;
Hisashi Mori, Fukuoka-ken, JP;
Kazunari Yabe, Fukuoka-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a light emitting device includes a light emitting layer, a first electrode, a first and second layers, and a cladding layer. The first layer has a first impurity concentration of a first conductivity type, and allows a carrier to be diffused in the light emitting layer. The second layer has a second impurity concentration of the first conductivity type higher than the first impurity concentration, and includes a first and second surfaces. The first surface is with the first layer. The second surface has a formation region and a non-formation region of the first electrode. The non-formation region includes convex structures with an average pitch not more than a wavelength of the emission light. The cladding layer is provided between the first layer and the light emitting layer and has an impurity concentration of the first conductivity type.