US 11,735,218 B2
Magnetic tape and magnetic tape container
Norihito Kasada, Minamiashigara (JP); and Yuto Murata, Minamiashigara (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Feb. 25, 2022, as Appl. No. 17/680,866.
Claims priority of application No. 2021-030917 (JP), filed on Feb. 26, 2021.
Prior Publication US 2022/0277769 A1, Sep. 1, 2022
Int. Cl. G11B 5/78 (2006.01); G11B 23/04 (2006.01)
CPC G11B 5/78 (2013.01) [G11B 23/042 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic tape comprising:
a non-magnetic support; and
a magnetic layer including a ferromagnetic powder,
wherein a dimension change amount Δw in a width direction with respect to a tension change in a longitudinal direction is 400 ppm/N to 900 ppm/N,
the magnetic layer includes a plurality of servo bands,
a coefficient of variation CV calculated by Equation A:
CV=(σG/Δw)×100
is 10% or less, and
the σG is a standard deviation of servo band intervals measured in a region of the magnetic tape over 100 m in the longitudinal direction with a tension of 0.6 N in the longitudinal direction.