Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...
Patent
1994-01-21
1996-03-19
Kiliman, Leszek
Stock material or miscellaneous articles
Self-sustaining carbon mass or layer with impregnant or...
428421, 428610, 428634T, 428634TP, 428694TC, 428694TF, 428694TR, 428695, 428900, 2041922, 20419234, 2041921, B32B 900, B32B 2700, G11B 566, C23C 1400
Patent
active
055002960
ABSTRACT:
The present invention provides a magnetic recording medium wherein the surface layer of the protective film of the medium is irradiated by ions to give a protective film having high reliability in resistance to sliding with the magnetic head, a process for producing the medium, an apparatus for producing the medium, and a magnetic recording apparatus having the medium mounted therein. The essentials of the present invention lie in introducing a minute surface roughness of atomic order in the surface of the protective film 5 constituting the outermost layer of a magnetic recording medium by irradiating atoms accelerated by high voltage (that is, by implanting ions) to the surface.
REFERENCES:
patent: 4717622 (1988-01-01), Kurokawa
patent: 4840844 (1989-06-01), Futamoto
patent: 4861662 (1989-08-01), Koblisko
patent: 4880687 (1989-11-01), Yokoyame
patent: 4889767 (1989-12-01), Yokoyame
patent: 5118577 (1992-06-01), Brar
patent: 5227211 (1989-07-01), Eltoukhy
patent: 5275850 (1994-01-01), Kitoh
Japanese Patent Application Kokai No. H. 2-208827 T. Takahashi Aug. 20, 1990.
Ibid. No. H. 1-263913 K. Shinohane Oct. 20, 1989.
Abe Katsuo
Hirose Shin-ichi
Inoue Youichi
Mizumoto Muneo
Ohura Masaki
Hitachi , Ltd.
Kiliman Leszek
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