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:
Nov. 08, 2022
Filed:
Feb. 25, 2021
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Yoshihiro Sawayashiki, Minami-ashigara, JP;
Gen Omura, Minami-ashigara, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/65 (2006.01); G11B 5/008 (2006.01); G11B 5/733 (2006.01); G11B 5/735 (2006.01); G11B 5/706 (2006.01);
U.S. Cl.
CPC ...
G11B 5/653 (2013.01); G11B 5/00813 (2013.01); G11B 5/70678 (2013.01); G11B 5/733 (2013.01); G11B 5/7356 (2019.05);
Abstract
The magnetic recording medium includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. The ferromagnetic powder is a ferromagnetic powder selected from the group consisting of a hexagonal strontium ferrite powder and an ε-iron oxide powder. The standard deviation of a height of the magnetic projection portion on a surface of the magnetic layer is in a range of 0.5 to 2.5 nm.