发明授权
- 专利标题： Magnetic recording medium, method for producing thereof, and magnetic recording and reproducing apparatus
- 专利标题（中）： 磁记录介质，其制造方法以及磁记录和再现装置
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申请号： US12274879申请日： 2008-11-20
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公开(公告)号： US07867638B2公开(公告)日： 2011-01-11
- 发明人: Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
- 申请人： Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
- 申请人地址： JP Tokyo JP Tokyo
- 专利权人： Showa Denko K.K.,Kabushiki Kaisha Toshiba
- 当前专利权人： Showa Denko K.K.,Kabushiki Kaisha Toshiba
- 当前专利权人地址： JP Tokyo JP Tokyo
- 代理机构： Sughrue Mion, PLLC
- 优先权： JP2003-103454 20030407
- 主分类号： G11B5/66
- IPC分类号： G11B5/66 ; G11B5/673 ; C23C16/40
摘要：
A magnetic-recording medium which is provided on a nonmagnetic substrate with at least an orientation-controlling layer for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate, and a protective layer. The perpendicularly magnetic layer includes two or more magnetic layers, at least one of the magnetic layers is a layer having Co as a main component and containing Pt as well and containing an oxide, and at least another of the magnetic layers is a layer having Co as a main component and containing Cr as well and containing no oxide.
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