Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
AssigneeFUJIFILM Corporation
InventorsNorihito Kasada, Eiki Ozawa, Atsushi Musha
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Abstract
The magnetic tape includes a non-magnetic support and a magnetic layer including ferromagnetic powder and a binding agent, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference (L99.9−L0.1) between a value L99.9 of a cumulative distribution function of 99.9% and a value L0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an isoelectric point of a surface zeta potential of the magnetic layer is 3.8 or less.
Claims20
A magnetic tape comprising:
- a non-magnetic support;
- a magnetic layer including ferromagnetic powder and a binding agent;
- a non-magnetic layer including non-magnetic powder and a binding agent between the non-magnetic support and the magnetic layer;
- and
- a back coating layer including non-magnetic powder and a binding agent on a surface side of the non-magnetic support opposite to a surface side provided with the magnetic layer,
- wherein the magnetic layer has a timing-based servo pattern,
- wherein the ferromagnetic powder comprises hexagonal ferrite powder and/or ε-iron oxide powder,
- wherein an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference L99.9−L0.1 between a value L99.9 of a cumulative distribution function of 99.9% and a value L0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and
- wherein an isoelectric point of a surface zeta potential of the magnetic layer is 3.8 or less.
Dependencies are inferred from the claim text.