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:
Mar. 08, 2005
Filed:
Mar. 20, 2002
Shingo Hamaguchi, Kawasaki, JP;
Sumio Kuroda, Kawasaki, JP;
Kazuyuki Ozaki, Kawasaki, JP;
Ken Tamanoi, Kawasaki, JP;
Koji Matsumoto, Kawasaki, JP;
Shingo Hamaguchi, Kawasaki, JP;
Sumio Kuroda, Kawasaki, JP;
Kazuyuki Ozaki, Kawasaki, JP;
Ken Tamanoi, Kawasaki, JP;
Koji Matsumoto, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A master medium for magnetic transfer includes a substrate having a concave portion formed in its surface corresponding to a pattern of recorded information to be transferred; a first perpendicular ferromagnetic layer deposited in the concave portion; and a second perpendicular ferromagnetic layer layered on the substrate surface and the first perpendicular ferromagnetic layer surface. The substrate surface and the first perpendicular ferromagnetic layer surface are flattened to form a single flat surface. In the master medium for magnetic transfer, a magnetic field change in a direction parallel to the substrate surface at a magnetization boundary of the first perpendicular ferromagnetic layer is steep. Since the influence of the change of an external magnetic field is reduced, it is possible to perform accurate transfer from the master medium for magnetic transfer to a slave medium for magnetic recording.