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. 30, 2025
Filed:
Jun. 28, 2024
Fujifilm Corporation, Tokyo, JP;
Junya Sawada, Minamiashigara, JP;
Norihito Kasada, Minamiashigara, JP;
Nobuhito Onozuka, Minamiashigara, JP;
Ryosuke Yumiyama, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. Svi obtained by measuring a surface of the magnetic layer with an atomic force microscope and by Equation A is 0.080 or more and 0.130 or less, and standard deviation σ of the Svi in a width direction of the surface of the magnetic layer is 0.010 or less. In Equation A, Sq is a root-mean-square height Sq specified in ISO 25178, Vv(h) is a void volume in a region where a load area ratio in a bearing curve is 80% or more and 100% or less, and A is a measurement region area.