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    • 6. 发明公开
    • Magnetic disk and method of manufacturing same
    • Magnetplatte und Methode zu ihrer Herstellung
    • EP1464694A1
    • 2004-10-06
    • EP04007350.4
    • 2004-03-26
    • HOYA CORPORATIONHoya Magnetics Singapore Pte. Ltd.
    • Shimokawa, KoichiIshiyama, Masafumi
    • C10M107/38C10M171/04G11B5/72G11B5/84
    • G11B5/8408C10M107/38C10M171/04C10M2211/0425C10M2213/043C10N2220/021C10N2240/204C10N2250/121C10N2270/00G11B5/725
    • 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-CH 2 -CH(OH)-CH 2 -O-CH 2 -CF 2 (-O-C 2 F 4 )p-(O-CF2)q-O-CF 2 -CH 2 -O-CH 2 -CH(OH)-CH 2 -OH

         wherein p and q are natural number,
      and a compound denoted by chemical formula

              HO-CH 2 -CF 2 (-O-C 2 F 4 )m-(O-CF2)n-O-CF 2 -CH 2 -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-CH 2 -CF 2 (-O-C 2 F 4 )m-(O-CF2)n-O-CF 2 -CH 2 -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; 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.
    • 公开了一种在基板上包括磁性层,保护层和润滑层的磁盘制造方法。 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为自然数,由化学式HO-CH2-CF2(-O-C2F4)m-(O-CF2)nO-CF2-CH2- OH,其中m和n是自然数,通过分子量分级,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具有磁性层,保护层和润滑层的磁盘。