MAGNETIC DISK

摘要

PURPOSE:To improve synergistically the durability of a magnetic layer by combining a carbon protective film and a thin film consisting of a solid lubricating agent. CONSTITUTION:An Al-Mg alloy substrate 1 on which an Ni-P plating layer 2 is formed as a nonmagnetic metallic underlying layer is prepd. and an underlying film 3 of low m.p. metal is formed on the layer 2 by vapor deposition of Bi using an electron beam. A thin magnetic metallic film 4 is further formed thereon by the vapor deposition of Co by the electron beam. The carbon protective film 5 is formed thereon by a vacuum deposition method. The thin film 6 consisting of the solid lubricating agent is formed in succession thereto by sputtering in a gaseous argon atmosphere.