Magnetic disk and method of manufacturing same

    公开(公告)号:US07105241B2

    公开(公告)日:2006-09-12

    申请号:US10809352

    申请日:2004-03-26

    IPC分类号: G11B5/66 G11B5/70

    摘要: Disclosed is a method of manufacturing magnetic disks, comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate. In the process, a lubricant alpha comprising a compound denoted by chemical formula HO—CH2—CH(OH)—CH2—O—CH2—CF2(—O—C2F4)p-(O—CF2)q-O—CF2—CH2—O—CH2—CH(OH)—CH2—OH wherein p and q are natural number,and a compound denoted by chemical formula HO—CH2—CF2(—O—C2F4)m-(O—CF2)n-O—CF2—CH2—OH wherein m and n are natural number,is fractionated by molecular weight to prepare a lubricant a having a weight average molecular weight (Mw) of from 3,000 to 7,000 and a molecular weight dispersion of less than or equal to 1.2;a lubricant beta comprising a compound denoted by the chemical formula HO—CH2—CF2(—O—C2F4)m-(O—CF2)n-O—CF2—CH2—OH wherein m and n are natural number,is fractionated by molecular weight to prepare a lubricant b having a weight average molecular weight (Mw) of from 2,000 to 5,000 and a molecular weight dispersion of less than or equal to 1.2;a lubricant c comprising a mixture of lubricants a and b is prepared; anda film of lubricant c is formed on a protective layer provided on a substrate to form a lubricating layer. A magnetic disk comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate, in which the lubricating layer has been formed on the protective layer is also enclosed.

    Magnetic disk and method of manufacturing same
    6.
    发明申请
    Magnetic disk and method of manufacturing same 有权
    磁盘及其制造方法

    公开(公告)号:US20040213951A1

    公开(公告)日:2004-10-28

    申请号:US10809352

    申请日:2004-03-26

    IPC分类号: B32B003/02

    摘要: Disclosed is a method of manufacturing magnetic disks, comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate. In the process, a lubricant alpha comprising a compound denoted by chemical formula HOnullCH2nullCH(OH)nullCH2nullOnullCH2nullCF2(nullOnullC2F4)p-(OnullCF2)qnullOnullCF2nullCH2nullOnullCH2nullCH(OH)nullCH2nullOH wherein p and q are natural number, and a compound denoted by chemical formula HOnullCH2nullCF2(nullOnullC2F4)m-(OnullCF2)nnullOnullCF2nullCH2nullOH wherein m and n are natural number, is fractionated by molecular weight to prepare a lubricant a having a weight average molecular weight (Mw) of from 3,000 to 7,000 and a molecular weight dispersion of less than or equal to 1.2; a lubricant beta comprising a compound denoted by the chemical formula HOnullCH2nullCF2(nullOnullC2F4)m-(OnullCF2)nnullOnullCF2nullCH2nullOH wherein m and n are natural number, is fractionated by molecular weight to prepare a lubricant b having a weight average molecular weight (Mw) of from 2,000 to 5,000 and a molecular weight dispersion of less than or equal to 1.2; a lubricant c comprising a mixture of lubricants a and b is prepared; and a film of lubricant c is formed on a protective layer provided on a substrate to form a lubricating layer. A magnetic disk comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate, in which the lubricating layer has been formed on the protective layer is also enclosed.

    摘要翻译: 公开了一种制造磁盘的方法,在基板上包括磁性层,保护层和润滑层。 在该方法中,包含由化学式HO-CH 2 -CH(OH)-CH 2 -O-CH 2 -CF 2(-O-C 2 F 4)对(O-CF 2)q O-CF 2 -CH 2 -O -CH 2 -CH(OH)-CH 2 -OH,其中p和q为天然数,化学式为HO-CH 2 -CF 2(-O-C 2 F 4)m - (O-CF 2)n O-CF 2 -CH 2 - OH,其中m和n是天然数,通过分子量进行分级,以制备重均分子量(Mw)为3,000至7000,分子量分散度小于或等于1.2的润滑剂a; 包含由化学式HO-CH2-CF2(-O-C2F4)m-(O-CF2)nO-CF2-CH2-OH表示的化合物的润滑剂β,其中m和n是自然数,通过分子量分级至 制备重均分子量(Mw)为2,000至5,000且分子量分散度小于或等于1.2的润滑剂b; 制备包含润滑剂a和b的混合物的润滑剂c; 并且在设置在基板上的保护层上形成润滑剂c以形成润滑层。 也包围在保护层上形成有润滑层的基板上的磁性层,保护层和润滑层的磁盘。