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:
Dec. 21, 2021
Filed:
Nov. 19, 2018
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/584 (2006.01); G11B 5/78 (2006.01); G11B 5/008 (2006.01); G11B 5/73 (2006.01); G11B 5/706 (2006.01); G11B 20/12 (2006.01); G11B 5/667 (2006.01); G11B 5/708 (2006.01); G11B 5/65 (2006.01);
U.S. Cl.
CPC ...
G11B 5/78 (2013.01); G11B 5/00813 (2013.01); G11B 5/584 (2013.01); G11B 5/65 (2013.01); G11B 5/667 (2013.01); G11B 5/708 (2013.01); G11B 5/70678 (2013.01); G11B 5/73919 (2019.05); G11B 20/1201 (2013.01); G11B 2020/1281 (2013.01);
Abstract
A tape-shaped magnetic recording medium includes a substrate; and a magnetic layer that is provided on the substrate and contains a magnetic powder. An average thickness of the magnetic layer is not more than 90 nm, an average aspect ratio of the magnetic powder is not less than 1.0 and not more than 3.0, the coercive force Hc1 in a vertical direction is not more than 3000 Oe, and the coercive force Hc1 in the vertical direction and a coercive force Hc2 in a longitudinal direction satisfy a relationship of Hc2/Hc1≤0.8.