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:
Aug. 24, 2004
Filed:
Aug. 29, 2002
Hitachi Cable, Ltd., , JP;
Abstract
A LED monolithic array type like emitting device which has a plurality of light emitting parts. The device is particularly suitable as a light source for printers. Each light emitting part has a light emitting diode having a laminate structure. The laminate structure has an end-type GaAs substrate and, epitaxially grown on the n-type substrate in the following order: 1) an n-type GaSa buffer layer, an n-type laminated reflection film formed of layer pairs, each having AlGaAs layers different from each other in aluminum composition ratio, an n-type AlGaAs lower cladding layer, a p-type or undoped AlGaAs active layer, a p-type AlGaAs upper cladding layer and a p-type AlGaAs contact layer. Each layer pair making up the laminated reflection film has an Al GA As layer and an Al GA As layer where X1 and X2 represent the Al composition ratio.