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:
Jan. 02, 2024
Filed:
Sep. 26, 2022
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Yujin Shibata, Minamiashigara, JP;
Norihito Kasada, Minamiashigara, JP;
Takuto Kurokawa, Minamiashigara, JP;
So Matsuyama, Minamiashigara, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/78 (2006.01); G11B 5/65 (2006.01); G11B 23/107 (2006.01); G11B 5/584 (2006.01); G11B 5/733 (2006.01); G11B 5/008 (2006.01);
U.S. Cl.
CPC ...
G11B 5/653 (2013.01); G11B 5/00813 (2013.01); G11B 5/584 (2013.01); G11B 5/733 (2013.01); G11B 5/78 (2013.01); G11B 23/107 (2013.01);
Abstract
The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder, in which an edge portion Ra which is an arithmetic average roughness Ra measured at an edge portion of a surface of the magnetic layer is 1.50 nm or less, a central portion Ra which is an arithmetic average roughness Ra measured at a central portion of the surface of the magnetic layer is 0.30 nm to 1.30 nm, and a Ra ratio (central portion Ra/edge portion Ra) is 0.75 to 0.95.