发明名称 |
Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier |
摘要 |
A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.
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申请公布号 |
US6961196(B2) |
申请公布日期 |
2005.11.01 |
申请号 |
US20030396674 |
申请日期 |
2003.03.25 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ISHIDA TATSUAKI;SUGITA RYUJI;TOHMA KIYOKAZU;YOSHIMOTO KAZUNARI;MIYATA KEIZOU;RYONAI HIROSHI |
分类号 |
G11B5/596;G11B5/64;G11B5/855;G11B5/86;(IPC1-7):G11B5/86 |
主分类号 |
G11B5/596 |
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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