Magnetic recording medium and process for producing same
AssigneeHitachi, Ltd.
InventorsYoshihiro Moriguchi, Youichi Inomata, Hiroshi Yashiki, Yoshiki Kato, Kenichi Gomi, Hideaki Tanaka
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Abstract
A magnetic recording medium excellent in corrosion resistance and rubbing reliability is realized by forming a number of concavities and convexities on the surface of a protective layer formed on a substrate and applying dry etching with a noble gas after the formation of the concavities and convexities to form a modified layer having hydrophobic nature on the surface of the protective layer.
Claims24
A process for producing a magnetic recording medium which comprises forming a magnetic layer on a substrate, forming a protective layer on the magnetic layer, forming a number of concavities and convexities on the surface of the protective layer, and subsequently forming a modified layer having hydrophobicity on the protective layer by modifying the surface of the protective layer.
A process for producing a magnetic recording medium which comprises:
- forming a magnetic layer on a substrate;
- forming a protective layer containing as a major component carbon on the magnetic layer;
- applying a great number of microscopic particles of a resin on a surface of the protective layer;
- etching the protective layer using the microscopic particles of the resin as a masking material so as to form a number of concavities and convexities thereon;
- and
- etching further the thus etched protective layer under stream of a noble gas so as to enhance hydrophobicity of a surface of concavities and convexities.
A process for producing a magnetic recording medium which comprises:
- forming a magnetic layer on a substrate;
- forming a protective layer containing as a major component carbon on the magnetic layer;
- etching the protective layer using a masking material so as to form a number of concavities and convexities thereon;
- and
- etching further the thus etched protective layer under a stream of a noble gas so as to enhance hydrophobicity of a surface of concavities and convexities.
Dependencies are inferred from the claim text.