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:
Apr. 11, 2006
Filed:
Sep. 26, 2003
Kuniaki Konno, Kanagawa, JP;
Junichi Fujiki, Kanagawa, JP;
Kuniaki Konno, Kanagawa, JP;
Junichi Fujiki, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A power LED high in light extraction efficiency is obtained without increasing the operation voltage and degrading the reliability. The power LED comprises: epitaxial growth layers including a first conductive type clad layer, an active layer made of an InGaAlP compound semiconductor on said first conductive type clad layer to generate light, and a second conductive type clad layer formed on said active layer; and a transparent first conductive type GaP substrate made of GaP with a thickness of equal to or more than 150 μm and having a first surface, said first surface having an area equal to or wider than 0.1 mmand bonded to a bonding surface of said first conductive type clad layer via no layer or via a bond layer, an area of said bonding surface of said first conductive type clad layer being smaller than said first surface of said substrate to locally expose said first surface or said bond layer.