Patent ID: 8846137
Filing Date: 2014-09-30
Classification: G11B

Abstract:
1. A method of manufacturing a magnetic disk comprising at least a magnetic layer, a protective layer, and a lubricating layer formed in this order over a substrate, wherein the lubricating layer is formed by: first dispersing and dissolving a perfluoropolyether compound comprising a perfluoropolyether main chain and four or more hydroxyl groups in a structure thereof in a fluorine-based solvent having a boiling point of 90° C. or more to obtain a coating solution; heating the coating solution to a temperature in a range of 45° C. to 60° C. such that the temperature of the coating solution is lower than a boiling point of the solvent and the perfluoropolyether compound is dissolved in the solvent; and then coating the magnetic disk having the magnetic layer and the protective layer with the coating solution having the temperature of 45° C. to 60° C. to form the lubricating layer by dipping and immersing the magnetic disk having the magnetic layer and the protective layer into the coating solution having the temperature of 45° C. to 60° C., and then lifting the magnetic disk out of the coating solution to obtain the lubricating layer uniformly coated on the protective layer.