JPS6448223A - Production of magnetic recording medium - Google Patents

Abstract

PURPOSE:To lower the coefft. of friction between a memory medium and head and to enhance the mechanical reliability of the memory medium by pulling up a substrate surface on which a thin carbonaceous film is formed at an equal speed while rotating a liquid lubricant or solid lubricant. CONSTITUTION:The substrate surface formed with the thin carbonaceous film on a thin metallic film medium is pulled up at the equal speed while the liquid lubricant or solid lubricant is kept rotated. Namely, a hard film coated base body subjected to an alumite treatment or nonmagnetic plating treatment such as Ni-P plating is subjected to polishing for formation of a specular surface and thereafter a magnetic film is formed thereon to constitute the substrate. The lubricating agent is coated on the magnetic recording medium constituted by forming a protective film consisting of SiO2, TiC, C, MoW2, etc., on the substrate formed in such a manner while the disk is kept rotated. This coating is intended to uniformize the lubricating layer in the circumferential direction of the disk. The rotating speed of the disk is adequately about 1-100rpm. The coefft. of friction is thereby greatly improved and the mechanical reliability is enhanced. Since the lower floating is possible as well, the higher density recording is sufficiently possible.