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: US10804145申请日: 2004-03-19
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公开(公告)号: US07045227B2公开(公告)日: 2006-05-16
- 发明人: Tatsuo Ishikawa , Mikio Ohno
- 申请人: Tatsuo Ishikawa , Mikio Ohno
- 申请人地址: JP 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: JP Kanagawa
- 代理机构: Sughrue Mion, PLLC
- 优先权: JPP.2003-080223 20030324
- 主分类号: G11B5/738
- IPC分类号: G11B5/738
摘要:
A magnetic recording medium comprising: a nonmagnetic support; an undercoat layer containing a compound polymerizable by radiation exposure; and a magnetic layer containing ferromagnetic powder and a binder, in this order wherein the undercoat layer has a thickness of from 0.1 to 1 μm, the binder contains a polyurethane resin having a glass transition temperature of from 100 to 200° C., the magnetic layer has a thickness of from 20 to 150 nm, and an average particle size of the ferromagnetic powder is from 20 to 60 nm.
公开/授权文献
- US20040191528A1 Magnetic recording medium 公开/授权日:2004-09-30