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:
Feb. 08, 2022
Filed:
Oct. 24, 2018
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventors:
Katsumi Murofushi, Chiba, JP;
Yoshitaka Ishibashi, Chiba, JP;
Takayuki Fukushima, Chiba, JP;
Kazuya Niwa, Chiba, JP;
Lei Zhang, Chiba, JP;
Yuji Murakami, Chiba, JP;
Hisato Shibata, Chiba, JP;
Takehiro Yamaguchi, Chiba, JP;
Chen Xu, Chiba, JP;
Tetsuya Kanbe, Chiba, JP;
Tomoo Shige, Chiba, JP;
Assignee:
SHOWA DENKO K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/65 (2006.01); G11B 5/72 (2006.01); G11B 5/82 (2006.01); G11B 5/851 (2006.01); C08L 61/28 (2006.01);
U.S. Cl.
CPC ...
G11B 5/65 (2013.01); G11B 5/656 (2013.01); G11B 5/72 (2013.01); G11B 5/82 (2013.01); C08L 61/28 (2013.01); G11B 5/851 (2013.01);
Abstract
A magnetic recording medium includes a substrate, an underlayer provided on the substrate, and a magnetic layer provided on the underlayer and having a L1structure and a (001) orientation. The magnetic layer has a granular structure in which an organic compound having a methylene skeleton or a methine skeleton is arranged at grain boundaries of magnetic grains.