发明名称 |
Composite magnetic disk with Si and SiC substrate |
摘要 |
The invention relates to a composite magnetic disk for magnetic recording, which consists of an annular core of polymeric material to which is bonded at least one disk of reaction-bonded silicon carbide with a magnetic recording layer on its outer surface. After its processing, the SiSiC disk surface shows optimum planarity and smoothness so that it can be used as a magnetic disk substrate. Furthermore, the material has a low density and an extremely high specific modulus of elasticity so that numbers of revolution higher than obtainable with formerly known AlMg5 disk substrates can be reached.
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申请公布号 |
US4598017(A) |
申请公布日期 |
1986.07.01 |
申请号 |
US19840612768 |
申请日期 |
1984.05.22 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BAYER, THOMAS;HINKEL, HOLGER;KLEISCHMANN, KURT;KUENZEL, ULRICH;SCHAEFER, ROLF |
分类号 |
G11B5/70;G11B5/66;G11B5/73;G11B5/733;G11B5/82;(IPC1-7):G11B5/64 |
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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