发明授权
- 专利标题： Magnetic recording medium and method of producing the same
- 专利标题（中）： 磁记录介质及其制造方法
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申请号： US09508836申请日： 2000-03-17
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公开(公告)号： US06316062B1公开(公告)日： 2001-11-13
- 发明人: Ryuji Sakaguchi , Kazuo Kobayashi , Hiroshi Sakai , Mikio Suzuki , Kenichi Yoneyama , Kazunori Ohnami
- 申请人： Ryuji Sakaguchi , Kazuo Kobayashi , Hiroshi Sakai , Mikio Suzuki , Kenichi Yoneyama , Kazunori Ohnami
- 优先权： JP9-252494 19970917; JP10-130823 19980513; JP10-130824 19980513; JP10-130825 19980513; JP10-130826 19980513; JP10-130827 19980513; JP10-161134 19980609; JP10-161135 19980609; JP10-161136 19980609; JP10-161137 19980609; JP10-161138 19980609; JP10-161139 19980609; JP10-168140 19980609; JP10-189503 19980703
- 主分类号： H05H102
- IPC分类号： H05H102
摘要：
The present invention provides a method for manufacturing a magnetic recording medium comprising the steps of forming a carbon protective film onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, using a reactant gas containing carbon atoms as a starting material, according to a plasma CVD method, wherein a mixed gas of hydrocarbon and hydrogen, in which the mixing ratio of hydrocarbon to hydrogen is in the range of 2 to 1˜1 to 100 by volume, is used as a reactant gas, during bias applying to said disc. In addition, the present invention provides a magnetic recording medium comprising a carbon protective film formed onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, wherein said carbon protective film is formed according to a plasma CVD method, while applying bias.
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