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    • 4. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US09076479B2
    • 2015-07-07
    • US13965140
    • 2013-08-12
    • FUJI ELECTRIC CO., LTD.
    • Tomonori KatanoAkiyasu KumagaiKatsumi TaniguchiHiromi OnoNarumi SatoShinji Uchida
    • G11B5/66G11B5/725G11B5/72G11B5/84
    • G11B5/725G11B5/72G11B5/82G11B5/8408
    • A magnetic recording medium includes a substrate having sequentially formed thereon (a) a magnetic layer; (b) a protective layer having a thickness ranging from 1.0 nm to 2.5 nm and being composed of an amorphous metal layer having a thickness of at least 0.3 nm, the amorphous metal layer being composed of a metal selected from the group consisting of Si, Al, Ge, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W that is in an amorphous state; (c) a carbon layer formed on the amorphous metal layer and having a thickness of at least 0.3 nm, the carbon layer including amorphous carbon; and (d) a lubricating layer, wherein the carbon layer includes nitrogen atoms in a surface thereof in which a ratio of number of nitrogen atoms to total number of carbon atoms, nitrogen atoms, and oxygen atoms is 14 atomic % or less.
    • 磁记录介质包括其上顺序形成的基板(a)磁性层; (b)厚度为1.0nm〜2.5nm的保护层,由厚度为0.3nm以下的非晶质金属层构成,所述无定形金属层由选自Si, Al,Ge,Ti,Zr,Hf,V,Nb,Ta,Cr,Mo和W; (c)形成在所述非晶态金属层上并具有至少0.3nm的厚度的碳层,所述碳层包括无定形碳; 和(d)润滑层,其中,碳层在其表面含有氮原子数与碳原子数,氮原子数和氧原子的比率为14原子%以下的氮原子。