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AssigneeHitachi, Ltd.
InventorsHiroshi Tani, Hiroyuki Matsumoto, Mitsuhiro Shyoda, Tomonori Kozaki, Takayuki Nakakawaji, Yoko Ogawa
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The present invention provides a magnetic recording media made possible to improve reliability and durability of the magnetic recording media with an extremely thin overcoat. A magnetic recording media made by forming at least a magnetic coat and an overcoat on a substrate of non-magnetic magnetic disk on which surface a liquid lubricant having a structure of perfluoropolyether is coated, wherein average roughness of overcoat surface Ra is less than 0.8 nm, said overcoat being a diamond-like-carbon with a thickness in a range of 1.5-4.5 nm, and said lubricant on said carbon overcoat containing a lubricant component having a structure represented by chemical formula (1): (where, p=5-36, q=4-30, x=1-5).
A magnetic recording media made by forming at least a magnetic layer and an overcoat on a substrate of non-magnetic disk on which surface a liquid lubricant of a perfluoropolyether structure is coated, wherein surface of said overcoat having less than 0.8 nm average roughness Ra, said overcoat being a layer of diamond-like-carbon with less than 5 nm thickness, and said lubricant coat on said overcoat containing a lubricant component having a structure represented by following chemical formula (1):
A magnetic recording media made by forming at least a magnetic layer and an overcoat on a substrate of non-magnetic magnetic disk on which surface a liquid lubricant of a perfluoropolyether structure is coated, wherein surface of said overcoat having less than 0.8 nm average roughness Ra, said overcoat being a layer of diamond-like-carbon with a thickness in a range of 1.5-4.5 nm, and said lubricant coat on said carbon overcoat containing a lubricant component having a structure represented by following chemical formula (1):
Dependencies are inferred from the claim text.