发明名称 |
MAGNETIC RECORDING MEDIUM |
摘要 |
PURPOSE:To improve corrosion resistance, wear resistance and recording and reproducing characteristics by forming a ferromagnetic Co oxide film on a magnetic recording layer consisting of an Fe magnetic metal. CONSTITUTION:The lower magnetic recording layer 2 consisting of the Fe magnetic metal and the upper magnetic recording layer 3 consisting of the ferromagnetic Co oxide film are formed on one surface of a non-magnetic substrate 1. An alloy contg. Fe at a low ratio is slightly disadvantageous in terms of a material cost in addition to a decrease in Bs and therefore the Fe magnetic metal consisting of the Fe alone or ferromagnetic alloy contg. 25% Fe is used. The Co oxide film 3 is formed by depositing Co by evaporation or ion plating the same in the presence of dilute oxygen or sputtering Co in an inert gas contg. oxygen.
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申请公布号 |
JPS61229228(A) |
申请公布日期 |
1986.10.13 |
申请号 |
JP19850071588 |
申请日期 |
1985.04.04 |
申请人 |
CANON INC |
发明人 |
TAKAGI HIROTSUGU;SUZUKI KENJI;HASHIMOTO MORIMI |
分类号 |
G11B5/66;C08L31/04;C08L67/00;C08L77/00;C08L79/00;C08L81/06;G11B5/64;G11B5/72;G11B5/73 |
主分类号 |
G11B5/66 |
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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