Method for producing a magnetic recording medium having a carbon

Details Method for producing a magnetic recording medium having a carbon Method for producing a magnetic recording medium having a carbon

1996-09-30

1998-08-25

Resan, Stevan A.

Coating processes

Magnetic base or coating

Magnetic coating

427131, 427249, 4272552, 427535, 427576, 427577, 427579, G11B 585

Patent

active

057981353

ABSTRACT:
A ferromagnetic metal thin film recording medium having a nonmagnetic substrate, a ferromagnetic metal thin film formed on the nonmagnetic substrate, a dry etched layer which is formed in a surface layer of the ferromagnetic metal thin film and contains oxygen atoms in a higher concentration than the remaining part of the ferromagnetic metal thin film, a hard carbonaceous film formed on the dry etched layer of the ferromagnetic metal thin film, a lubricant layer formed on said hard carbonaceous film, and optionally a modified layer which is formed on the hard carbonaceous film and has a thickness of less than 3 nm, and comprises carbon, nitrogen and oxygen atoms with an atomic ratio of nitrogen to carbon being at least 0.8%, which recording medium has improved running stability, durability and weatherability while maintaining electromagnetic conversion characteristics.

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