发明名称 |
Magnetic recording medium having a magnetic layer with specified limits of both RA and R10Z surface roughness |
摘要 |
Disclosed are a magnetic recording medium which comprises a non-magnetic support, one or more coating layers provided on the non-magnetic support and an upper layer of the coating layers being a magnetic layer containing ferromagnetic metallic powder with the total thickness of the coating layers being 0.5 to 2.5 mu m, wherein the magnetic layer has a surface roughness Ra of 1.0 to 4.6 nm and a surface roughness R10z of 8.0 to 35.0 nm, which satisfy the relations of: Ra</=-0.47t+0.5/t+3.8 and R10z</=-1.50t+6.0/t+23.0 where t is the total thickness of the coating layers in terms of mu m, and an aliphatic acid ester is contained in the surface portion of the magnetic layer in an amount of 5 to 50 mg/m2, and a process for preparing the same.
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申请公布号 |
USRE36220(E) |
申请公布日期 |
1999.06.01 |
申请号 |
US19960611619 |
申请日期 |
1996.03.08 |
申请人 |
KONICA CORPORATION;TDK CORPORATION |
发明人 |
MORI, TAKAHIRO;SASAKI, KUNITSUNA;KATO, HISATO;IMAI, KAZUYOSHI;HAYASHI, TAKAHIRO |
分类号 |
G11B5/70;G11B5/714;G11B5/716;G11B5/738;G11B5/78;G11B5/842;(IPC1-7):G11B5/00 |
主分类号 |
G11B5/70 |
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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