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:
Sep. 27, 2005
Filed:
Jun. 25, 2002
Applicants:
Masakazu Nishikawa, Kanagawa-ken, JP;
Tadashi Yasunaga, Kanagawa-ken, JP;
Inventors:
Masakazu Nishikawa, Kanagawa-ken, JP;
Tadashi Yasunaga, Kanagawa-ken, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B005/86 ;
U.S. Cl.
CPC ...
Abstract
A master carrier for magnetic transfer is equipped with a substrate with a land/groove pattern of lands and grooves, and a magnetic layer formed on the land/groove pattern. The adhesion between the substrate and the magnetic layer is 1.2×10N/mor greater. A first oxygen concentration Dat the magnetic layer formed on the land is reduced gradually toward the direction of the depth of the substrate and is greater than a second oxygen concentration Dat the magnetic layer formed on the groove.