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:
Apr. 01, 2008
Filed:
Jun. 12, 2006
Chiseki Haginoya, Odawara, JP;
Kaori Suzuki, Mitaka, JP;
Hisashi Kimura, Odawara, JP;
Masaaki Futamoto, Shiroyama, JP;
Hideo Matsuyama, Hannou, JP;
Chiseki Haginoya, Odawara, JP;
Kaori Suzuki, Mitaka, JP;
Hisashi Kimura, Odawara, JP;
Masaaki Futamoto, Shiroyama, JP;
Hideo Matsuyama, Hannou, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention is directed to carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning onto a soft magnetic under layer of a perpendicular two-layer recording media in sync with a period of a recording bit, a magnetic field from a write head can be allowed to converge to a soft magnetic column. Therefore, a magnetization reversal of the magnetic recording media material having a large anisotropic constant becomes possible, and then a high density magnetic recording can be achieved.