| 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-CHz-CH(OH)-CHz-O-CHz-CFz(-O-CzF4)p-(O-CF2)q-O-CFz-CHz-O-CHz-CH(OH)-CHz-OH wherein p and q are natural number, and a compound denoted by chemical formula HO-CHz-CFz(-O- CzF4)m-(O-CF2)n-O-CFz-CHz-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-CHz- CFz(-O-CZF4)m-(O-CF2)n-O-CFz-CHz-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.
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