Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2005-09-20

2005-09-20

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

C428S408000, C428S690000

Reexamination Certificate

active

06946191

ABSTRACT:
In a magnetic recording medium which comprises a substrate (1), a magnetic layer (3) formed on the substrate, a carbon-based protection layer (4) comprising carbon and formed on the magnetic layer, and a lubrication layer (5) formed on the carbon-based protection layer, the carbon-based protection layer comprises a hydrogenated carbon protection layer (4a) facing the magnetic layer and a nitrogenated carbon protection layer (4b) facing the lubrication layer. The hydrogenated carbon protection layer (4a) comprises carbon and hydrogen. The nitrogenated carbon protection layer (4b) includes no hydrogen but comprises carbon and nitrogen.

REFERENCES:
patent: 5837357 (1998-11-01), Matsuo et al.
patent: 6099981 (2000-08-01), Nishimori
patent: 6136403 (2000-10-01), Prabhakara et al.
patent: 11-175960 (1999-07-01), None
patent: 3058066 (2000-04-01), None

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