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    • 2. 发明申请
    • MAGNETIC DISK AND MANUFACTURING METHOD THEREOF
    • 磁盘及其制造方法
    • US20120127599A1
    • 2012-05-24
    • US13121901
    • 2009-09-30
    • Koichi ShimokawaKatsushi HamakuboKae Itoh
    • Koichi ShimokawaKatsushi HamakuboKae Itoh
    • G11B21/04G11B5/84G11B5/725
    • G11B5/725C10M107/38C10M171/02C10M177/00C10M2213/003C10M2213/0606C10N2220/021C10N2230/06C10N2240/204C10N2250/14C10N2280/00G11B5/82G11B5/8408G11B5/86
    • A magnetic disk is provided which is excellent in durability of the magnetic disk or particularly in LUL durability and CFT characteristics and has high reliability under a decreased floating amount of the magnetic head accompanying the recent rapid increase in a recording density and extremely severe environmental resistance accompanying diversification of the applications.The magnetic disk of the present invention is a magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate, and the lubrication layer is a film formed by a lubricant that contains two types of compounds having a perfluoropolyether main chain in the structure, a molecular weight distribution of the two types in total being within a range of 1 to 1.2, the two types of compounds including a compound a having a hydroxyl group at the end and a compound b having a number average molecular weight smaller than the number average molecular weight of the compound a and not more than 1500, and a content of the compound b in the two types of compounds being not more than 10%.
    • 提供了一种磁盘,其具有优异的磁盘的耐久性,特别是LUL耐久性和CFT特性,并且伴随着近来记录密度的快速增加和极其恶劣的环境阻力,磁头浮动量减少,具有高可靠性 多样化的应用程序。 本发明的磁盘是至少具有磁性层,碳保护层和依次设置在基板上的润滑层的磁盘,润滑层是由含有两种类型的化合物的润滑剂形成的膜 在该结构中具有全氟聚醚主链,两种类型的分子量分布总计在1至1.2的范围内,两种类型的化合物包括末端具有羟基的化合物a和化合物b具有 数均分子量小于化合物a的数均分子量,不大于1500,两种化合物中化合物b的含量不超过10%。