发明授权
- 专利标题： Magnetic recording medium
- 专利标题（中）： 磁记录介质
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申请号： US10858198申请日： 2004-06-02
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公开(公告)号： US07081308B2公开(公告)日： 2006-07-25
- 发明人: Hisao Kawai , Teiichiro Umezawa , Hirotaka Tanaka , Masaki Uemura
- 申请人： Hisao Kawai , Teiichiro Umezawa , Hirotaka Tanaka , Masaki Uemura
- 申请人地址： JP Tokyo SG Tuas Link 2
- 专利权人： Hoya Corporation,Hoya Magnetics Singapore Pte. Ltd.
- 当前专利权人： Hoya Corporation,Hoya Magnetics Singapore Pte. Ltd.
- 当前专利权人地址： JP Tokyo SG Tuas Link 2
- 代理机构： Sughrue Mion, PLLC
- 优先权： JP2001-304093 20010928
- 主分类号： G11B5/66
- IPC分类号： G11B5/66 ; G11B5/70
摘要：
In a magnetic recording medium including a substrate (1) having a principal surface on which first and second magnetic layers (5 and 7) and a spacer layer (6) are at least formed, each of the first and the second magnetic layers being of a ferromagnetic material, the spacer layer being formed between the first and the second magnetic layers for inducing antiferromagnetic exchange interaction between the first and the second magnetic layers, the principal surface of the substrate is provided with concentric textures to have a predetermined surface roughness so that the spacer layer has a uniform thickness. The first magnetic layer is for controlling the antiferromagnetic exchange interaction.
公开/授权文献
- US20040219394A1 Magnetic recording medium 公开/授权日：2004-11-04
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