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:
Mar. 02, 2021
Filed:
Jul. 12, 2019
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Minoru Yamaga, Miyagi, JP;
Noboru Sekiguchi, Miyagi, JP;
Tooru Sato, Miyagi, JP;
Takashi Aizawa, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/78 (2006.01); G11B 5/73 (2006.01);
U.S. Cl.
CPC ...
G11B 5/78 (2013.01); G11B 5/73917 (2019.05);
Abstract
There is provided a magnetic recording medium of which an average thickness tis t≤5.6 μm, a dimensional change amount Δw in a width direction with respect to a change in tension in a longitudinal direction is 660 ppm/N≤Δw, a squareness ratio in a vertical direction is 65% or more, and a width deformation coefficient b during long-term storage in a case where a long-term storage width change amount Y is defined as Y=blog(t) is −0.06 μm≤b≤0.06 μm.