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:
Apr. 04, 2023
Filed:
Apr. 06, 2018
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Junichi Tachibana, Miyagi, JP;
Takashi Aizawa, Miyagi, JP;
Teruo Sai, Miyagi, JP;
Noboru Sekiguchi, Miyagi, JP;
Tetsuo Endo, Miyagi, JP;
Tomoe Ozaki, Miyagi, JP;
Ryoichi Hiratsuka, Miyagi, JP;
Assignee:
SONY CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/667 (2006.01); G11B 5/73 (2006.01); G11B 5/65 (2006.01);
U.S. Cl.
CPC ...
G11B 5/667 (2013.01); G11B 5/653 (2013.01); G11B 5/656 (2013.01); G11B 5/737 (2019.05); G11B 5/7363 (2019.05); G11B 5/7364 (2019.05); G11B 5/7369 (2019.05);
Abstract
A magnetic recording medium includes a flexible and elongated substrate, a soft magnetic layer having an average thickness of 10 nm or more to 50 nm or less, and a recording layer. The soft magnetic layer is disposed between the substrate and the recording layer, and a difference in Young's modulus between the magnetic recording medium and the substrate in a longitudinal direction of the substrate is 2.4 GPa or more.