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： US109013申请日： 1987-10-16
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公开(公告)号： US4803121A公开(公告)日： 1989-02-07
- 发明人: Katsumi Ryoke , Masatoshi Takahashi , Toshimitu Okutu , Hideaki Kosha
- 申请人： Katsumi Ryoke , Masatoshi Takahashi , Toshimitu Okutu , Hideaki Kosha
- 申请人地址： JPX Kanagawa
- 专利权人： Fuji Photo Film Co., Ltd.
- 当前专利权人： Fuji Photo Film Co., Ltd.
- 当前专利权人地址： JPX Kanagawa
- 优先权： JPX61-244034 19861016
- 主分类号： C09D5/23
- IPC分类号： C09D5/23 ; G11B5/708 ; G11B5/70
摘要：
A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic fine particles, a binder, and .alpha.-alumina particles having an average size of from about 0.1 to 0.3 .mu.m, provided that the number of .alpha.-alumina particles having a particle size of larger than 0.05 .mu.m is at least equal to the number of .alpha.-alumina particles having a particle size of up to 0.05 .mu.m.
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