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:
Sep. 23, 2025
Filed:
Dec. 13, 2023
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventor:
So Matsuyama, Minamiashigara, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/78 (2006.01); G11B 5/008 (2006.01); G11B 5/584 (2006.01); G11B 5/66 (2006.01); G11B 5/70 (2006.01); G11B 5/73 (2006.01); G11B 5/733 (2006.01); G11B 5/735 (2006.01); G11B 15/67 (2006.01); G11B 23/107 (2006.01);
U.S. Cl.
CPC ...
G11B 5/78 (2013.01); G11B 5/00817 (2013.01); G11B 5/584 (2013.01); G11B 5/66 (2013.01); G11B 5/70 (2013.01); G11B 5/7334 (2019.05); G11B 5/7356 (2019.05); G11B 5/7368 (2019.05); G11B 15/67 (2013.01); G11B 23/107 (2013.01); G11B 2220/956 (2013.01);
Abstract
The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 75 nm or more and less than 125 nm is 100 or more and 4000 or less, and standard deviation σ of the number of the bright regions in a width direction of the surface of the magnetic layer is 400 or less.