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:
May. 22, 2007
Filed:
Aug. 23, 2005
Kazuyoshi Furukawa, Kawasaki, JP;
Yoshinori Natsume, Yokohama, JP;
Wakana Nishiwaki, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor light-emitting device including a light-emitting portion permitting light at a specific wavelength and having two surfaces opposite each other. The device also includes a first type of semiconductor substrate and a second type semiconductor substrate which are integrally joined to corresponding surfaces of the light-emitting portion and are substantially transparent to the wavelength. The semiconductor substrates have a joined surface on the surfaces of the light-emitting portion and outer side surfaces which have the width large on a side near the light-emitting portion and become narrow on a side away from the light-emitting portion and further surfaces opposite the joined surfaces. The device also includes first and second electrodes which are disposed on the corresponding further surfaces, a semiconductor layer in a region of at least one of the semiconductor substrates, and an impurity that causes current flow in concentrated manner through the middle of the light-emitting portion.