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. 19, 2025
Filed:
Mar. 08, 2016
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Eiji Nakashio, Miyagi, JP;
Futoshi Sasaki, Miyagi, JP;
Yuuichi Masuzawa, Miyagi, JP;
Masaru Terakawa, Miyagi, JP;
Minoru Yamaga, Miyagi, JP;
Yoichi Kanemaki, Miyagi, JP;
Kazuya Hashimoto, Miyagi, JP;
Tomoe Sato, Miyagi, JP;
Nobuyuki Sasaki, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/733 (2006.01); G11B 5/70 (2006.01);
U.S. Cl.
CPC ...
G11B 5/733 (2013.01); G11B 5/70 (2013.01); G11B 5/7334 (2019.05);
Abstract
Provided is a magnetic recording medium including: a support body; a base layer containing carbon particle powder and metal-containing particle powder; and a recording layer. In a recording surface, a maximum indentation depth h is 85≤h≤140, and a ratio d of a permanent strain to an elastic recovery (permanent strain/elastic recovery) is 0.95≤d≤1.25.