发明公开
- 专利标题: Method of producing magnetic recording media
- 专利标题(中): 制作磁记录媒体的方法
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申请号: EP91302974.0申请日: 1991-04-04
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公开(公告)号: EP0450956A3公开(公告)日: 1991-12-11
- 发明人: Suzuki, Hiroshi , Nishiyama, Tousaku , Hirokoh, Masaki , Ohata, Tsumoru
- 申请人: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 申请人地址: 1006, Kadoma Kadoma-shi, Osaka-fu 571 JP
- 专利权人: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人地址: 1006, Kadoma Kadoma-shi, Osaka-fu 571 JP
- 代理机构: Crawford, Andrew Birkby
- 优先权: JP90812/90 19900405; JP176010/90 19900703
- 主分类号: G11B5/845
- IPC分类号: G11B5/845
摘要:
A method of producing a coated magnetic recording medium comprises a step of coating a nonmagnetic substrate with a magnetic paste layer mainly composed of acicular or granular magnetic particles and a resin binder, a spontaneous drying step for a specific period for inducing leveling of coated surface and spontaneous volatilization of solvent without applying magnetic field from outside after coating the magnetic paint, a first orientation step for dissipating the aggregated particles by a sudden change in magnetic field while inducing magnetic moment in magnetic particles by a strong DC magnetic field inside the coated surface and in a longitudinal direction of the medium for arraying the magnetic particles in the coated surface in the longitudinal direction, and a successive second orientation step for suppressing the magnetic repulsive force among particles while arraying the magnetic particles by a DC magnetic field in the coated surface in the longitudinal direction.
公开/授权文献
- EP0450956B1 Method of producing magnetic recording media 公开/授权日:1995-09-27
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