Magnetic recording medium
First Claim
1. A method of magnetically recording signals on a magnetic recording medium and reproducing the magnetically recorded signals with a magnetoresistive magnetic head, whereinsaid signals are magnetically recorded with a track width of 0.5 μ
- m to 2.0 μ
m,said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder on a nonmagnetic support,said magnetic layer has a thickness equal to or less than 0.2 μ
m, andsaid hexagonal ferrite ferromagnetic powder has an average plate diameter of 1/30 or less of the magnetically recorded track width as well as ½
or less of the thickness of the magnetic layer.
1 Assignment
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Accused Products
Abstract
Provided is a magnetic recording medium exhibiting good electromagnetic characteristics in high-density recording The magnetic recording medium employed for magnetically recording signals with a track width equal to or less than 2.0 μm and reproducing the magnetically recorded signals, wherein said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder or comprises a nonmagnetic layer comprise a nonmagnetic powder and a binder and a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder in this order on a nonmagnetic support. Said magnetic layer has a thickness equal to or less than 0.2 μm, and said hexagonal ferrite ferromagnetic powder has an average plate diameter being 1/30 or less of the magnetically recorded track width as well as ½ or less of the thickness of the magnetic layer.
101 Citations
16 Claims
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1. A method of magnetically recording signals on a magnetic recording medium and reproducing the magnetically recorded signals with a magnetoresistive magnetic head, wherein
said signals are magnetically recorded with a track width of 0.5 μ - m to 2.0 μ
m,said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder on a nonmagnetic support, said magnetic layer has a thickness equal to or less than 0.2 μ
m, andsaid hexagonal ferrite ferromagnetic powder has an average plate diameter of 1/30 or less of the magnetically recorded track width as well as ½
or less of the thickness of the magnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- m to 2.0 μ
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9. In an apparatus comprising a magnetic head and a magnetic recording medium having magnetically recorded signals, the improvement wherein:
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the magnetic head is a magnetoresistive head, the magnetoresistive magnetic head reproduces magnetically recorded signals with a track width of 0.5 μ
m to 2.0 μ
m,said magnetic recording medium comprises a magnetic layer comprising a hexagonal ferrite ferromagnetic powder and a binder on a nonmagnetic support, said magnetic layer has a thickness equal to or less than 0.2 μ
m, andsaid hexagonal ferrite ferromagnetic powder has an average plate diameter of 1/30 or less of the magnetically recorded track width as well as ½
or less of the thickness of the magnetic layer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification
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- Resources
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Current AssigneeFujifilm Corporation (Fujifilm Holdings Corporation)
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Original AssigneeFujifilm Corporation (Fujifilm Holdings Corporation)
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InventorsYamazaki, Nobuo, Saito, Shinji, Noguchi, Hitoshi
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Primary Examiner(s)Bernatz; Kevin M
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Application NumberUS11/237,973Publication NumberTime in Patent Office1,286 DaysField of SearchNoneUS Class Current360/131CPC Class CodesG11B 5/70 on a base layerG11B 5/70678 FerritesG11B 5/714 characterised by the dimens...
