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:
Sep. 05, 2023
Filed:
Apr. 07, 2022
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Masaru Terakawa, Tokyo, JP;
Minoru Yamaga, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/62 (2006.01); G11B 5/733 (2006.01); G11B 5/706 (2006.01); G11B 5/735 (2006.01); G11B 5/596 (2006.01); G11B 5/68 (2006.01);
U.S. Cl.
CPC ...
G11B 5/62 (2013.01); G11B 5/59688 (2013.01); G11B 5/68 (2013.01); G11B 5/70678 (2013.01); G11B 5/733 (2013.01); G11B 5/7358 (2019.05);
Abstract
A magnetic recording medium is provided and includes a layer structure including a magnetic layer, a non-magnetic layer, and a base layer in order, in which an average thickness tof the magnetic recording medium is 4.0 μm≤t≤5.3 μm, a dimensional variation Δw in a width direction of the magnetic recording medium to tension change in a longitudinal direction of the magnetic recording medium is 680 ppm/N≤Δw≤2000 ppm/N, and an average thickness tof the non-magnetic layer is t≤1.0 μm.