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:
Oct. 10, 2011
Filed:
Apr. 23, 2002
Applicant:
Tadao Katsuragawa, Zama, JP;
Inventor:
Tadao Katsuragawa, Zama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 11/00 (2005.12);
U.S. Cl.
CPC ...
Abstract
A magneto-optical device including a substratewhich istransparent to light in a visible spectrum regionand,a plurality of ferromagnetic layersarranged thereon, each ferromagnetic layer preferablyhaving a widthranging fromin an inclusive range of5tothrough100 nanometers and a thicknessranging fromin an inclusive range of0.1tothrough5 microns. The, wherein saidferromagnetic layers are parallel to each other and separated by a distanceranging fromin an inclusive range of0.2tothrough2 microns.The ferromagnetic layers are arranged preferably on the side walls of grooves formed parallel to each other in the transparent substrate.