发明申请
- 专利标题: Magnetic recording medium and method for manufacturing the same
- 专利标题(中): 磁记录介质及其制造方法
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申请号: US11898757申请日: 2007-09-14
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公开(公告)号: US20080070066A1公开(公告)日: 2008-03-20
- 发明人: Hisanobu Mikamo , Hidekazu Kawatoko , Makoto Shiokawa , Shinji Kawakami , Masanori Yamasaki , Hitoshi Tsukamoto , Sadamu Kuse
- 申请人: Hisanobu Mikamo , Hidekazu Kawatoko , Makoto Shiokawa , Shinji Kawakami , Masanori Yamasaki , Hitoshi Tsukamoto , Sadamu Kuse
- 专利权人: HITACHI MAXELL, LTD.
- 当前专利权人: HITACHI MAXELL, LTD.
- 优先权: JP2006-253179 20060919
- 主分类号: G11B5/842
- IPC分类号: G11B5/842 ; B05D5/12
摘要:
A method for manufacturing a magnetic recording medium of the present invention includes a magnetic layer forming step in which a drying process is performed. The drying process includes: a pre-heating stage in which a magnetic coating film is heated until the surface temperature of the magnetic coating film stops rising and reaches a substantially constant temperature; a constant rate drying stage that is performed after the pre-heating stage in which the surface temperature of the magnetic coating film is held substantially constant; and a falling rate drying stage that is performed after the constant rate drying stage in which the surface temperature of the magnetic coating film is increased to be higher than the surface temperature during the constant rate drying stage to harden the magnetic coating film. The constant rate drying period in which the constant rate drying stage is performed is 0.2 seconds or more. The first solvent is made of one solvent or two or more solvents having different boiling points, and the difference (Tb−Ts) between the boiling point Tb of the solvent having the lowest boiling point among the solvents contained in the first solvent and the surface temperature Ts of the magnetic coating film during the constant rate drying period is 1 to 50° C.