Overcoat for particulate magnetic recording disk

Details Overcoat for particulate magnetic recording disk Overcoat for particulate magnetic recording disk

1986-02-13

1988-04-12

Pianalto, Bernard D.

Stock material or miscellaneous articles

Composite

Of inorganic material

20419216, 427130, 427131, 428900, G11B 572

Patent

active

047374195

ABSTRACT:
Carbon is sputter-deposited as a protective overcoat on the coating of a magnetic recording disk of the type in which the coating includes magnetic particles dispersed in an organic binder. The carbon film exhibits excellent durability and lubricity, thereby eliminating the need to incorporate alumina or other load-bearing particles into the magnetic coating, and eliminating the need for a liquid lubricant on the disk surface.

REFERENCES:
patent: 4503125 (1985-03-01), Nelson et al.
Friedman et al., vol. 9, No. 7, Dec. 1966, IBM Tech. Dis. Bull., Lubricants . . . Media.
"Properties of Amophous Carbon Films Produced by Magnetron Sputtering", Thin Solid Films, vol. 122, No. 3, Dec. 21, 1984) pp. 203-216.
"A Diamond-like Carbon Film", RCA Review, vol. 43, No. 4 (Dec. 1982), pp. 665-673.

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