| 摘要 |
PURPOSE:To obtain the titled disk which is hardly abraded by sliding contact with a magnetic head, without the generation of abraded powder, and having excellent durability by oxidizing the surface of the outermost magnetic material layer of a magnetic disk or of the nonmagnetic metallic material layer with O3 to form a protective layer. CONSTITUTION:A magnetic material layer 2 of an Ni.P alloy is formed on a nonmagnetic substrate 1 of an aluminum alloy, etc., and a magnetic material layer 3 of a Co.P alloy, etc. is further formed thereon to obtain a magnetic disk. When a nonmagnetic metallic material layer is further formed on the outermost layer 3 of the magnetic disk, etc. or on the layer 3, the surface of the layer is retained in the atmosphere of O3, which is heated at about 120 deg.C, for about an hour to form a Co oxide layer 4, or the layer of nonmagnetic metallic oxide is formed. Then a lubricating layer 5 of perfluoropolyether, etc. is coated on the layer 4 or on the nonmagnetic metallic oxide layer. Consequently, the magnetic disk having excellent durability and without the generation of abraded powder and head clash is obtained without deteriorating the electromagnetic transducing characteristic. |
