发明名称 |
Process for producing magnetic recording medium with limited coercivity squareness ratio |
摘要 |
A magnetic recording medium containing a magnetic recording layer with a coercivity squareness ratio of 0.4 to 0.9 is produced by magnetic transfer, for which a magnetic field is applied to an unrecorded magnetic recording medium while maintaining a patterned side of the patterned master medium in close contact with the magnetic recording layer for magnetic transfer. At least portions of the patterned side are made of a soft-magnetic material, and the pattern formed on the patterned side has a bit length of 60 nm or smaller. It is possible to arrange the magnetic recording layer to have a coercive force of 398 kA/m or greater, reduce the bit length to 55 nm or smaller, and heat the magnetic recording layer to 100° C. or higher during application of the magnetic field.
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申请公布号 |
US2005277000(A1) |
申请公布日期 |
2005.12.15 |
申请号 |
US20050152156 |
申请日期 |
2005.06.15 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
NAGAO MAKOTO;SUGITA RYUJI;YASUNAGA TADASHI |
分类号 |
G11B5/62;G11B5/72;G11B5/82;G11B5/855;G11B5/86;(IPC1-7):G11B5/147;B05D3/00 |
主分类号 |
G11B5/62 |
代理机构 |
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主权项 |
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