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:
Aug. 21, 2018
Filed:
Jul. 25, 2017
Applicant:
Kabushiki Kaisha Toshiba, Minato-ku, Tokyo, JP;
Inventor:
Makoto Asakura, Bunkyo Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/09 (2006.01); G11B 5/596 (2006.01); G11B 20/12 (2006.01);
U.S. Cl.
CPC ...
G11B 5/59633 (2013.01); G11B 20/1217 (2013.01); G11B 20/1258 (2013.01);
Abstract
According to one embodiment, a magnetic disc has N (N is an integer of 2 or more) zones divided in a radial direction, and servo patterns different in servo pattern frequency are recorded in the individual zones. The relationship that the zone width of a K-th (K is an integer of 1 or more and N−1 or less) zone from the outer radial side of the magnetic disc is larger than the zone width of the K+1-th zone adjacent to the K-th zone on the inner diameter side applies to all the K-th zones in which K is 1 or more and N−1 or less.