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:
Jan. 04, 2011
Filed:
Jul. 10, 2008
Applicant:
Kimio Nakamura, Fujisawa, JP;
Inventor:
Kimio Nakamura, Fujisawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/02 (2006.01); G11B 27/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
Heating power control is performed in thermally assisted magnetic recording using a patterned recording medium. Trial writing is performed by continuously changing a heating power intensity with respect to a pattern row of a trial writing area provided in plurality on the recording medium. From a reproduction signal thereof, a minimum heating power of recording that is a boundary power between recording and non-recording, and a maximum heating power of recording that is a boundary power between recording and a heating power by which recorded information of an adjacent pattern is deleted are determined to decide an optimum recording power.