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:
Feb. 16, 2010
Filed:
Jan. 30, 2007
Satoshi Wakamatsu, Odawara, JP;
Makoto Nagao, Odawara, JP;
Toshihide Ishioka, Odawara, JP;
Atsushi Morooka, Odawara, JP;
Satoshi Wakamatsu, Odawara, JP;
Makoto Nagao, Odawara, JP;
Toshihide Ishioka, Odawara, JP;
Atsushi Morooka, Odawara, JP;
FUJIFILM Corporation, Tokyo, JP;
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.