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. 26, 2013
Filed:
Jan. 09, 2012
Katsufumi Kondo, Tokyo, JP;
Ryo Saeki, Tokyo, JP;
Katsufumi Kondo, Tokyo, JP;
Ryo Saeki, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A light emitting device includes a stacked body including at least a light emitting layer made of In(AlGa)P(0≦x≦1, 0≦y≦1), a p-type cladding layer made of In(AlGa)P (0≦x≦1, 0≦y≦1), and a bonding layer made of a semiconductor; and a substrate in which deviation in a lattice constant at a bonding interface with the bonding layer is larger than deviation in lattice constants between the light emitting layer and the bonding layer. The p-type cladding layer is located more distant from the bonding interface than the light emitting layer, and the p-type cladding layer has a carrier concentration of 0.5×10cmor more and 3×10cmor less.