Dynamic magnetic information storage or retrieval – Record copying – Contact transfer
Reexamination Certificate
2007-01-30
2010-02-16
Blouin, Mark (Department: 2627)
Dynamic magnetic information storage or retrieval
Record copying
Contact transfer
Reexamination Certificate
active
07663827
ABSTRACT:
The present invention provides a method of initializing a perpendicular magnetic recording medium in which a magnetic field having a magnetic field strength Hex is applied to a perpendicular magnetic recording medium having a magnetic layer having a coercive force Hc to initialize the magnetic layer, the method comprising the steps of: controlling a magnetic field strength HexP in a direction parallel to the medium surface of the magnetic field so that HexP>1.3×Hc; and controlling a magnetic field strength HexV in a direction perpendicular to the medium surface of the magnetic field so that HexV<Hc.
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Noel Abarra., et al Bulk AC-Erasure Technique for Perpendicular Recording Media: Effect of Exchange Coupling, IEEE Transactions on Magnetics, vol. 41, No. 10, Oct. 2005, pp. 3127-3129.
Ishioka Toshihide
Morooka Atsushi
Nagao Makoto
Wakamatsu Satoshi
Blouin Mark
FUJIFILM Corporation
Sughrue & Mion, PLLC
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