PRODUCTION OF MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To obtain a magnetic recording medium having excellent corrosion resistance and durability by forming a metal-contg. hydrocarbon base protective film having no hydrophilic property by plasma polymn. on a magnetic layer on a substrate in a gaseous monomer of a hydrocarbon organo metallic compd. CONSTITUTION:A carrier gas such as Ar or He is mixed at the same volume or above with the gaseous monomer of the hydrocarbon base org. compd. such as Sn(CH3)4 or Ge(CH3)4 in order to increase the rate of the plasma polymn. Such gaseous mixture is fed into a treating vessel 2 of a plasma treating device to form the metal contg. hydrocarbon base plasma-polymerized film 9 without contg. elements such as O and N having hydrophilicity on the magnetic film 8 formed on the substrate 1 of polyester, etc. which is set to face downward on the substrate 3 in the upper part in the vessel 2 and on which the thin ferromagnetic metallic film 8 is provided. The film 9 is thereby provided with high adhesive force to the layer 8 and good corrosion resistance even in high-humidity environment. The magnetic recording medium having excellent durability is obtd.