Magnetic recording medium incorporating metallic magnetic thin f

Details Magnetic recording medium incorporating metallic magnetic thin f Magnetic recording medium incorporating metallic magnetic thin f

1990-07-09

1992-05-05

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428402, 428408, 428694, 428695, 428900, 20419216, 2041922, 20419214, G11B 2300

Patent

active

051106760

ABSTRACT:
A magnetic metallic thin film type of recording medium has particles of predetermined size uniformly distributed over a surface of a base layer, with a magnetic metallic thin film formed over these. A diamond-state carbon protective film, a carbon protective layer, e.g. of graphite, and a layer of lubricative material are successively formed over the metallic thin film, to provide lubrication and protection. As a result of surface contour modification resulting from the protrusions formed by the particles on the base layer, the contact area between the head and the recording medium is reduced, and this together with the multiple protective layers provides greatly increased durability by comparison with prior art configurations.

REFERENCES:
patent: 4713288 (1987-12-01), Kokaku et al.
patent: 4717622 (1988-01-01), Kurokawa et al.
patent: 4804590 (1989-02-01), Nakamora et al.
patent: 4833031 (1989-05-01), Kurokawa et al.
patent: 4880687 (1989-11-01), Yokoyama
patent: 4910068 (1990-03-01), Takagi et al.

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