发明名称 |
Magnetic recording medium |
摘要 |
A magnetic recording medium which comprises a non-ferromagnetic substrate having two types of defects or irregularities formed thereon along a circumferential direction with different center line average roughnesses, on which a non-ferromagnetic metal film and a Co alloy ferromagnetic film are formed by sputtering in this order. The ferromagnetic film has such a crystal structure that a (200) plane is parallel to the surface of the substrate and a <011> orientation is toward a circumferential direction. Thus, the C axis of the ferromagnetic film is oriented toward the circumferential direction of the substrate. A method for fabricating the magnetic recording medium is also described wherein the distance between the substrate and the respective targets for the non-ferromagnetic metal film and the Cr alloy ferromagnetic film is set within a mean free path of sputtered particles and the substrate is heated to a temperature of from 150 DEG to 300 DEG C. when these films are formed by sputtering.
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申请公布号 |
US5250338(A) |
申请公布日期 |
1993.10.05 |
申请号 |
US19900614477 |
申请日期 |
1990.11.16 |
申请人 |
VICTOR COMPANY OF JAPAN, LTD. |
发明人 |
SHINTANI, MASAKI;TAKASHIMA, KANJI;YAMAZKI, KOICHIRO;KATO, TOSHIO |
分类号 |
G11B5/82;G11B5/64;G11B5/65;G11B5/73;G11B5/738;G11B5/84;G11B5/85;G11B5/851;(IPC1-7):G11B5/00 |
主分类号 |
G11B5/82 |
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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