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    • 3. 发明授权
    • Master magnetic information carrier, fabrication method thereof, and a method for manufacturing a magnetic recording medium
    • 主磁信息载体,其制造方法以及制造磁记录介质的方法
    • US06613459B1
    • 2003-09-02
    • US09617357
    • 2000-07-17
    • Akira SaitoKazuo NimuraAkihiro Otsuki
    • Akira SaitoKazuo NimuraAkihiro Otsuki
    • B32B3220
    • B82Y10/00G11B5/59633G11B5/64G11B5/74G11B5/743G11B5/82G11B5/855G11B5/865
    • A master magnetic information carrier has embedded magnetic films that are free from protrusion and recess. The master disk is fabricated by the steps of laminating Co-based soft magnetic film on a resin base plate, forming isolated magnetic films in predetermined region by patterning the magnetic film, pressing a die from above the isolated magnetic films while heating the base plate with the magnetic films thereon, and releasing the die. Since the master disk is a mold product fabricated by pressing the die, the embedded magnetic films and the resin surface portion surrounding the magnetic films are intimately adjoined and protrusions and recesses at the boundary between them are suppressed to a minimum. The surface of the master disk is so smooth and flat that generation of flaws and gouges on the magnetic recording medium and transfer of particles and chemical contaminants to the recording medium in the contact duplication process are reduced.
    • 主磁信息载体具有嵌入的磁性膜,其不具有突出和凹陷。 通过以下步骤制造母盘:通过在树脂基板上层叠Co基软磁膜,通过图案化磁膜形成隔离的磁性膜,在隔离的磁性膜的上方对模具进行加压,同时加热基板 在其上的磁性膜,并释放模具。 由于母盘是通过按压模具制造的模具产品,所以嵌入的磁性膜和围绕磁性膜的树脂表面部分紧密地邻接,并且它们之间的边界处的突起和凹陷被抑制到最小。 主盘的表面是如此光滑和平坦,从而减少了在磁记录介质上产生瑕疵并且在接触复制过程中将颗粒和化学污染物转移到记录介质上。
    • 6. 发明授权
    • Method for manufacturing magnetic recording medium
    • 磁记录介质的制造方法
    • US06194025B1
    • 2001-02-27
    • US09493867
    • 2000-01-28
    • Kazuo Nimura
    • Kazuo Nimura
    • B05D512
    • G11B5/8408B05D1/18B05D3/0486
    • A lubricant film is formed on the surface of a substrate of a magnetic recording medium. The substrate consists of a non-magnetic base layer, a magnetic layer and a protective film, in that order. The substrate is immersed in a lubricant solution in a sealed container. The sealed container is pressurized with an inert gas introduced in the sealed container. The lubricant solution is then discharged, thereby forming a lubricant film on the surface of the protective film. Lubricant film thickness is varied by controlling a discharge rate, either by controlling the gas pressure, or the outflow rate of the lubricant solution.
    • 在磁记录介质的基板的表面上形成润滑膜。 该基板依次由非磁性基底层,磁性层和保护膜构成。 将基板浸入密封容器中的润滑剂溶液中。 密封容器用引入密封容器中的惰性气体加压。 然后排出润滑剂溶液,从而在保护膜的表面上形成润滑剂膜。 通过控制排气速率,通过控制气体压力或润滑剂溶液的流出速率来改变润滑剂膜厚度。