Magnetic recording tape medium with conductive particle configuration and cartridge
AssigneeSony Group Corporation
InventorsMinoru Yamaga, Yuuko Kamoshita
Life of this patent
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Abstract
A magnetic recording medium is a tape-shaped magnetic recording medium and includes: a base; and a magnetic layer. The magnetic layer contains a conductive particle. An average thickness of the magnetic recording medium is 5.3 μm or less. An average number of conductive particles per 400 μm2 of a surface of the magnetic layer is 50 or more, an average conductive particle area of the surface of the magnetic layer is 35000 nm2 or less, and an average conductive particle area ratio on the surface of the magnetic layer is less than 2.00%.
Claims15
A tape-shaped magnetic recording medium, comprising:
- a base;
- and
- a magnetic layer,
- the magnetic layer including conductive particles,
- an average thickness of the magnetic recording medium being 5.3 μm or less,
- an average number of conductive particles per 400 μm2 of a surface of the magnetic layer being 50 or more,
- an average conductive particle area of the surface of the magnetic layer being 35000 nm2 or less,
- an average conductive particle area ratio of the surface of the magnetic layer being less than 2.00%,
- wherein
- an average number of conductive particles having a particle size of 200 nm or more in a width direction of the magnetic recording medium per 400 μm2 of the surface of the magnetic layer is 10 or more and 30 or less.
A tape-shaped magnetic recording medium, comprising:
- a base;
- and
- a magnetic layer,
- the magnetic layer including conductive particles,
- an average thickness of the magnetic recording medium being 5.3 μm or less,
- an average number of conductive particles per 400 μm2 of a surface of the magnetic layer being 50 or more,
- an average conductive particle area of the surface of the magnetic layer being 35000 nm2 or less,
- an average conductive particle area ratio of the surface of the magnetic layer being less than 2.00%
- wherein
- an average number of conductive particles having a particle size of 200 nm or more in a width direction of the magnetic recording medium per 400 μm2 of the surface of the magnetic layer is 10 or more and 30 or less, wherein
- the average number of conductive particles,
- the average conductive particle area, and
- the average conductive particle area ratio are obtained from a measurement
- result by a C-AFM (Conductive Atomic Force Microscope).
Dependencies are inferred from the claim text.