US 12,462,839 B2
Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
Junya Sawada, Minamiashigara (JP); Norihito Kasada, Minamiashigara (JP); Nobuhito Onozuka, Minamiashigara (JP); and Ryosuke Yumiyama, Minamiashigara (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 28, 2024, as Appl. No. 18/759,153.
Claims priority of application No. 2023-107624 (JP), filed on Jun. 30, 2023.
Prior Publication US 2025/0006225 A1, Jan. 2, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/706 (2006.01); G11B 5/592 (2006.01); G11B 5/714 (2006.01); G11B 5/735 (2006.01); G11B 5/78 (2006.01)
CPC G11B 5/70678 (2013.01) [G11B 5/5928 (2013.01); G11B 5/714 (2013.01); G11B 5/7356 (2019.05); G11B 5/78 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A magnetic tape comprising:
a non-magnetic support; and
a magnetic layer containing a ferromagnetic powder,
wherein a dale void volume Vvv specified in ISO 25178 on a surface of the magnetic layer is 0.100 nm3 or more and 0.350 nm3 or less, and
standard deviation σ of the Vvv in a width direction of the surface of the magnetic layer is 0.020 nm3 or less.