Magnetic tape and magnetic tape device
AssigneeFUJIFILM Corporation
InventorsTetsuya Kaneko, Norihito Kasada, Eiki Ozawa
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Abstract
The magnetic tape includes a magnetic layer having ferromagnetic powder and a binder on a non-magnetic support, in which the magnetic layer includes a timing-based servo pattern, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an activation volume equal to or smaller than 1,600 nm3, and an edge shape of the timing-based servo pattern specified by a magnetic force microscope observation is a shape in which a difference (l99.9−l0.1) between a value l99.9 of a cumulative frequency function of 99.9% of a position deviation width from an ideal shape in a longitudinal direction of the magnetic tape and a value l0.1 of the cumulative frequency function of 0.1% thereof is equal to or smaller than 180 nm.
Claims18
A magnetic tape comprising:
- a non-magnetic support;
- a magnetic layer including ferromagnetic powder and a binder formed on the non-magnetic support,
- wherein the magnetic layer includes a timing-based servo pattern,
- the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an activation volume equal to or smaller than 1,600 nm3, and
- an edge shape of the timing-based servo pattern specified by a magnetic force microscope observation is a shape in which a difference, l99.9−l0.1, between a value l99.9 of a cumulative frequency function of 99.9% of a position deviation width from an ideal shape in a longitudinal direction of the magnetic tape and a value l0.1 of the cumulative frequency function of 0.1% is equal to or smaller than 180 nm.
A magnetic tape device comprising:
- a magnetic tape;
- a magnetic head;
- and
- a servo head, wherein
- the magnetic tape is a magnetic tape comprising:
- a non-magnetic support;
- a magnetic layer including ferromagnetic powder and a binder formed on the non-magnetic support,
- wherein the magnetic layer includes a timing-based servo pattern,
- the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an activation volume equal to or smaller than 1,600 nm3, and
- an edge shape of the timing-based servo pattern specified by a magnetic force microscope observation is a shape in which a difference, l99.9−l0.1, between a value l99.9 of a cumulative frequency function of 99.9% of a position deviation width from an ideal shape in a longitudinal direction of the magnetic tape and a value l0.1 of the cumulative frequency function of 0.1% is equal to or smaller than 180 nm.
Dependencies are inferred from the claim text.