Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1989-08-01

1991-12-03

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428694, 428695, 428900, 427131, 427132, 427 41, G11B 2300

Patent

active

050699679

ABSTRACT:
In a magnetic recording medium wherein a metal thin film magnetic layer and an overcoat are formed on a nonmagnetic substrate, durability is improved when the overcoat comprises a plasma-polymerized film and a topcoat of an organic fluorine compound; a plasma-polymerized film, a protective carbon film, and a topcoat of an organic fluorine compound; a plasma-polymerized film containing C, F and H; or a plasma-polymerized organometallic film and a fluorine or silicon-containing topcoat. Oxidation of the upper surface of the magnetic layer with a plasma is also effective.

REFERENCES:
patent: 4419404 (1983-12-01), Arai
patent: 4429024 (1984-01-01), Ueno
patent: 4565734 (1986-01-01), Arai
patent: 4582746 (1986-04-01), Shirahata
patent: 4693927 (1987-09-01), Nishikawa
patent: 4696845 (1987-09-01), Yanagisawa
patent: 4844978 (1989-07-01), Nakayama
patent: 4880687 (1989-11-01), Yokoyama
patent: 4889767 (1989-12-01), Yokoyama

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