发明申请
- 专利标题： NON-MAGNETIC PARTICLES FOR NON-MAGNETIC UNDERCOAT LAYER OF MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM
- 专利标题（中）： 磁性记录介质非磁性层的非磁性颗粒和磁记录介质
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申请号： US12188343申请日： 2008-08-08
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公开(公告)号： US20090042064A1公开(公告)日： 2009-02-12
- 发明人: Seiji ISHITANI , Hiroko Morii , Kazuyuki Hayashi
- 申请人： Seiji ISHITANI , Hiroko Morii , Kazuyuki Hayashi
- 申请人地址： JP Otake-shi
- 专利权人： TODA KOGYO CORPORATION
- 当前专利权人： TODA KOGYO CORPORATION
- 当前专利权人地址： JP Otake-shi
- 优先权： JP2007-209517 20070810
- 主分类号： G11B5/733
- IPC分类号： G11B5/733
摘要：
The present invention relates to non-magnetic particles for non-magnetic undercoat layer of magnetic recording medium, comprising: hematite particles; an inner coating layer comprising a phosphorus-containing inorganic compound which is formed on a surface of the respective hematite particles; and an outer coating layer comprising an aluminum-containing inorganic compound which is formed on an outside of the inner coating layer comprising the phosphorus-containing inorganic compound.
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