Protective overcoating for magnetic recording discs and method f

Details Protective overcoating for magnetic recording discs and method f Protective overcoating for magnetic recording discs and method f

1981-06-05

1985-03-05

Robinson, Ellis P.

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

360135, 427131, 427132, 428611, 428634, 428694, 428695, 428900, 428928, 428579, G11B 572

Patent

active

045031258

ABSTRACT:
A protective overcoating is disclosed for a magnetic alloy thin-film recording disc that includes a magnetic alloy film formed on a disc-shaped substrate or coated substrate. The protective overcoating is formed by first sputtering onto the magnetic medium an interfacial layer of titanium, and then sputtering onto the titanium a layer of carbon. The sputtered carbon provides wear-resisting lubricity, while the titanium interface promotes the adhesion of the sputtered carbon to the magnetic medium of the recording disc.

REFERENCES:
patent: 3471272 (1969-10-01), Wilhelm et al.
patent: 3472751 (1969-10-01), King
patent: 4052738 (1977-10-01), Hosomi et al.
patent: 4069360 (1978-01-01), Yanagisawa et al.
patent: 4224381 (1980-09-01), Patel et al.
patent: 4411963 (1983-10-01), Aine

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