Magnetic disk having a protective layer of sputtered particles o

Details Magnetic disk having a protective layer of sputtered particles o Magnetic disk having a protective layer of sputtered particles o

1994-12-30

1996-09-03

Resan, Stevan A.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428323, 428694TP, 428694TR, 428900, G11B 572

Patent

active

055522033

ABSTRACT:
A magnetic disk having an underlayer, a layer of magnetic material, and a protective layer applied on a substrate. The protective layer comprises sputtered particles of two differently controlled grain sizes wherein the particles of one grain size are at least two times greater than the particles of the other grain size.

REFERENCES:
patent: 3919717 (1975-11-01), Cullen et al.
patent: 4839244 (1989-06-01), Tsukamoto
patent: 4840843 (1989-06-01), Sano et al.
patent: 4990362 (1991-02-01), Kibe et al.
patent: 5030494 (1991-07-01), Ahlert et al.
patent: 5084319 (1992-01-01), Hibst et al.
patent: 5104709 (1992-04-01), Kokaku et al.
patent: 5374463 (1994-12-01), Bethune et al.

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