Magnetic tape and magnetic tape device
First Claim
1. 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, andan 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.
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Accused Products
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.
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Citations
18 Claims
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1. A magnetic tape comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A magnetic tape device comprising:
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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. - View Dependent Claims (15, 16, 17, 18)
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Specification