Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1987-05-06
1989-11-14
Thibodeau, Paul J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
427131, 427132, 428408, 428694, 428900, G11B 564
Patent
active
048806870
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), Meno
patent: 4565734 (1986-01-01), Arai
patent: 4582746 (1986-04-01), Shirahata
patent: 4693927 (1987-09-01), Nishikawa
Maruta Fumio
Nakayama Masatoshi
Shimozawa Toru
Ueda Kunihiro
Yokoyama Kenji
TDK Corporation
Thibodeau Paul J.
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