发明授权
- 专利标题: Magnetic recording medium and its manufacturing process
- 专利标题(中): 磁记录介质及其制造工艺
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申请号: US713285申请日: 1991-06-11
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公开(公告)号: US5378548A公开(公告)日: 1995-01-03
- 发明人: Hideo Torii , Eiji Fujii , Masumi Hattori , Masaki Aoki , Kiyoshi Kuribayashi
- 申请人: Hideo Torii , Eiji Fujii , Masumi Hattori , Masaki Aoki , Kiyoshi Kuribayashi
- 申请人地址: JPX Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX2-151955 19900611; JPX2-313519 19901119; JPX2-313521 19901119
- 主分类号: G11B5/725
- IPC分类号: G11B5/725 ; G11B5/73 ; G11B5/738 ; G11B5/66
摘要:
A magnetic recording medium, comprising; a 2-layer film formed on a glass disk substrate as an under layer composed of an amorphous oxide or NaCl oxides like a NiO or CoO and the like, or any soft magnetic oxide of Mn-Zn ferrite, Ni-Zn ferrite and the like, or a combination of those 2 materials; a magnetic recording medium formed thereon composed of a Co ferrite perpendicular magnetic film of a columnar structure; and a structure formed thereon with a lubricant layer medium. This magnetic recording medium is used for a magnetic rigid disk apparatus. The substrate is made by press-molding the glass plate at a high temperature. The under layer film and Co ferrite film are composed of vapors of organic material compounds and oxygen as their raw materials, and made by a plasma assisted CVD method.
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