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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroshi Seki, Kenji Kuwahara, Hideyuki Ueda, Kiyosi Takahasi, Masaru Odagiri, Mikio Murai
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A magnetic recording medium comprising a non-magnetic substrate, a ferromagnetic metal film formed on said non-magnetic substrate, a carbon film which is formed on said ferromagnetic metal film and in which a concentration of at least one element selected from the group consisting of silicon, phosphorus, sulfur, tin and indium is or concentrations of boron and at least one element selected from the group consisting of tin and indium are decreased in a depth direction from the surface of said carbon film, and a lubricant layer formed on said carbon film, which medium has improved running durability and corrosion resistance.
A magnetic recording medium comprising a non-magnetic substrate, a ferromagnetic metal film formed on said non-magnetic substrate, a carbon film which is formed on said ferromagnetic metal film comprising at least one element selected from the group consisting of silicon, phosphorus, sulfur, tin and indium in which the concentration of said element is decreased in a depth direction from the surface of said carbon film, and a lubricant layer formed on said carbon film.
A magnetic recording medium comprising a nonmagnetic substrate, a ferromagnetic metal film formed on said non-magnetic substrate, a carbon film which is formed on said ferromagnetic film and comprising boron and at least one element selected from the group consisting of tin and indium in which the concentrations of boron and said element are decreased in a depth direction from the surface of said carbon film, and a lubricant layer formed on said carbon film.
Dependencies are inferred from the claim text.