Cobalt base alloy as protective layer for magnetic recording med

Details Cobalt base alloy as protective layer for magnetic recording med Cobalt base alloy as protective layer for magnetic recording med

1976-11-15

1978-03-14

Steiner, Arthur J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

360134, 428652, 428668, 428678, 428679, 428928, B32B 1500, G11B 500

Patent

active

040791696

ABSTRACT:
A magnetic recording media is manufactured by depositing a nonmagnetic cobalt base alloy onto a substrate preferably aluminum as a protective layer for the substrate. The cobalt alloy includes chromium, tungsten, and nickel. The clad protective layer can be deposited in several steps with or without a polishing between the deposition steps to provide better corrosion protection for the substrate and covers surface imperfections of the substrate. The cobalt alloy is preferably sputtered onto the prepared substrate.

REFERENCES:
patent: 3418111 (1968-12-01), Herchenroeder
patent: 3471272 (1969-10-01), Wilhelm et al.
patent: 3520664 (1970-07-01), York
patent: 3702239 (1972-11-01), Nagy et al.
patent: 3751345 (1973-08-01), Wilhelm et al.

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