发明名称 |
Magnetic recording medium, method of manufacture therefor, and apparatus for magnetic recording and reproducing recordings |
摘要 |
A magnetic recording medium comprising: on a non-magnetic substrate, at least a soft magnetic undercoat film comprising a soft magnetic material; an orientation control film for controlling an orientation of a film directly above; a perpendicular magnetic film in which an axis of easy magnetization is oriented mainly perpendicularly with respect to the substrate; and a protection film, wherein the perpendicular magnetic film has a structure in which a large number of magnetic grains are separated by a grain boundary layer, and an average separating distance between the magnetic grains along a straight line which connects centers of gravity of mutually neighboring magnetic grains is 1 nm or greater.
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申请公布号 |
US6699600(B2) |
申请公布日期 |
2004.03.02 |
申请号 |
US20020082201 |
申请日期 |
2002.02.26 |
申请人 |
SHOWA DENKO K.K.;KABUSHIKI KAISHA TOSHIBA |
发明人 |
SHIMIZU KENJI;SAKAWAKI AKIRA;SAKAI HIROSHI;HIKOSAKA TAKASHI;OIKAWA SOICHI |
分类号 |
G11B5/64;G11B5/73;G11B5/855;(IPC1-7):G11B5/66 |
主分类号 |
G11B5/64 |
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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