发明名称 |
Magnetic recording medium |
摘要 |
A magnetic recording medium is disclosed which is excellent in video and audio signal output as well as in S/N ratio. The recording medium comprises first and second magnetic layers provided on a support in this order from said support and the first magnetic layer has a SFD value of from 0.38 to 0.60 and the second magnetic layer has a SFD value of from 0.30 to 0.45, wherein SFD is defined as follows: SFD= DELTA H/Hc where DELTA H is a half-width of magnetic field at the extreme value of differential coefficient of a magnetic induction-magnetic field hysterisis curve, and Hc is a coercive force of a magnetic material.
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申请公布号 |
US5188907(A) |
申请公布日期 |
1993.02.23 |
申请号 |
US19910734912 |
申请日期 |
1991.07.24 |
申请人 |
KONICA CORPORATION |
发明人 |
KAWAHARA, SETSUKO;NAKANO, YASUSHI;SHIMIZU, YUJI;YAMAUCHI, YASUHISA |
分类号 |
G11B5/716 |
主分类号 |
G11B5/716 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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