Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media
Reexamination Certificate
2011-02-01
2011-02-01
Rickman, Holly (Department: 1785)
Stock material or miscellaneous articles
Magnetic recording component or stock
Thin film media
C428S832000
Reexamination Certificate
active
07879468
ABSTRACT:
A magnetic recording medium is disclosed in which there is no degradation of magnetic characteristics at the time of manufacture, such as is seen in proposed discrete-track media or patterned media. The medium can be manufactured by a simple method and results in excellent productivity. Magnetic recording media have a substrate, and, provided thereon in order from the substrate side, are a soft magnetic layer, a crystal orientation control layer, and a magnetic recording layer. The area of at least a portion of the crystal orientation control layer is provided with a depressed portion. Portions of the magnetic layer formed on this depressed portion have a non-granular structure, whereas portions of the magnetic formed on the crystal orientation control layer outside the depressed portion have a granular structure. A method for manufacturing the magnetic recording media is disclosed having a soft magnetic layer formation process of forming a soft magnetic layer on a substrate; a crystal orientation layer formation process of providing a crystal orientation control layer on the soft magnetic layer; a depressed portion formation process of providing a depressed portion in the area of at least a portion of the crystal orientation control layer; and a process of forming a magnetic recording layer on the crystal orientation control layer on which the depressed portion is formed.
REFERENCES:
patent: 5679473 (1997-10-01), Murayama et al.
patent: 7586830 (2009-09-01), Yasui et al.
patent: 2006/0222905 (2006-10-01), Yasui et al.
patent: 2008/0118780 (2008-05-01), Kato
patent: 2008/0218906 (2008-09-01), Uchida
patent: 2009/0123781 (2009-05-01), Uchida
patent: 2009/0123782 (2009-05-01), Uchida
patent: 56-119934 (1981-09-01), None
patent: 01-158617 (1989-06-01), None
patent: 4-310621 (1992-11-01), None
patent: 2513746 (1996-04-01), None
patent: 08-115519 (1996-05-01), None
patent: 2003-16622 (2003-01-01), None
patent: 2003-123239 (2003-04-01), None
patent: 2003-242623 (2003-08-01), None
patent: 2006-12285 (2006-01-01), None
patent: 2006-286158 (2006-10-01), None
English machine translation of JP 2006-277950, Oct. 2006.
Oikawa et al.; “High Performance CoPtCrO Single Layered Perpendicular Media with No Recording Demagnetization”; IEEE Trans. Mag.; 2000; vol. 36, 2393; Japan.
Specification and drawings of U.S. Appl. No. 12/268,083 filed Nov. 10, 2008; “Method for Manufacturing Magnetic Recording Media”; Shinji Uchida; specification pp. 1-24; drawings pp. 1-4.
Specification and drawings of U.S. Appl. No. 12/268,047 filed Nov. 10, 2008; “Method for Manufacturing Magnetic Recording Media”; Shinji Uchida; specification pp. 1-22; drawings pp. 1-3.
Notification of Reasons for Refusal issued in corresponding Japanese Patent Application No. 2007-054546 dated Oct. 15, 2010. Partial English Translation provided.
Fuji Electric Device Technology Co. Ltd.
Rickman Holly
Rossi Kimms & McDowell LLP
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