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United States Patent 5,374,463
Bethune, et. al.Dec. 20, 1994

Magnetic recording disk having a contiguous fullerene film and a protective overcoat

Inventors: Bethune; Donald S. (San Jose, CA); Sjim'on de Vries; Mattanjah (Los Gatos, CA); Meijer; Gerard (Nijmegen, NLX); Novotny; Vlad J. (Cupertino, CA); Reiley; Timothy C. (Los Gatos, CA); Wu; Anthony W. (San Jose, CA).
Assignee: International Business Machines Corporation (Armonk, NY).
Appl. No.: 815,120
Filed: Oct. 22, 1991

Intl. Cl.:G11B 5/00;
U.S. Cl.:428/64.; 428/141.;
Field of Search:694;695;900;408;694 TC;694 TR;141;142;64

References Cited

U.S. Patent Documents
4,167,765Sept., 1979Watrous 360/103
4,503,125Mar., 1985Nelson et al. 428/408
4,542,071Sept., 1985Homola et al. 428/428
4,774,147Sept., 1988Kuse et al. 428/323
4,778,582Oct., 1988Howard 204/192 .15
4,804,590Feb., 1989Nakamura et al. 428/408
4,891,114Jan., 1990Hitzfeld et al. 204/192 .15
5,045,165Sept., 1991Yamashita 204/192 .16
5,084,319Jan., 1992Hibst et al. 428/ 64
5,182,166Jan., 1993Burton et al. 428/368
5,269,953Dec., 1993Whewell 252/ 30

Foreign Patent Documents
367510May, 1990EPX
63-079230Apr., 1988JPX

Other References

Primary Examiner: Resan; Stevan A.


A film comprising fullerene molecules or their derivatives, preferably C(60) or C(70) fullerene molecules, is used as a lubricating film between two bearing surfaces. In a particular embodiment, a data recording disk file with the film deposited on the disk surface has improved properties of static friction and wear resistance at the head-disk interface.

7 Claims, 5 Drawing Figures

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