发明授权
- 专利标题： Magnetic recording medium and method for manufacturing 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： US11114578申请日： 2005-04-26
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公开(公告)号： US08039133B2公开(公告)日： 2011-10-18
- 发明人: Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
- 申请人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
- 申请人地址： JP
- 专利权人： Fuji Electric Device Technology Co., Ltd.
- 当前专利权人： Fuji Electric Device Technology Co., Ltd.
- 当前专利权人地址： JP
- 代理机构： Rossi, Kimms & McDowell LLP
- 优先权： JP2001-377774 20011211
- 主分类号： G11B5/66
- IPC分类号： G11B5/66
摘要：
A magnetic recording medium, and method of manufacturing the same, is provided with excellent recording performance by employing a granular magnetic layer having a specified composition. A magnetic recording medium according to the present invention comprises a nonmagnetic underlayer, a granular magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on a nonmagnetic substrate. The granular magnetic layer consists of ferromagnetic crystal grains containing cobalt and nonmagnetic grain boundary region surrounding the ferromagnetic crystal grains. The ferromagnetic crystal grains contain platinum in the range of 15 at % to 17 at %.
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