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. 22, 2023
Filed:
Jun. 22, 2020
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventors:
Kota Hasegawa, Chiba, JP;
Yu Azuma, Chiba, JP;
Assignee:
RESONAC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/73 (2006.01); G11B 5/66 (2006.01); G11B 5/851 (2006.01); G11B 5/667 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7379 (2019.05); G11B 5/667 (2013.01); G11B 5/851 (2013.01);
Abstract
A magnetic recording medium includes a non-magnetic substrate; a soft magnetic layer; a first seed layer; a second seed layer; an underlayer; and a perpendicular magnetic recording layer. The soft magnetic layer, the first seed layer, the second seed layer, the underlayer and the perpendicular magnetic recording layer are disposed on the non-magnetic substrate in this order. The first seed layer includes MoS, hexagonal-BN, WS, WSeor graphite. The second seed layer includes AlN having a hexagonal wurtzite type crystal structure. The underlayer includes Ru.