Method for manufacturing thin-film medium with chromium underlay

Details Method for manufacturing thin-film medium with chromium underlay Method for manufacturing thin-film medium with chromium underlay

1992-12-23

1994-10-18

Nguyen, Nam

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

2041922, 20419223, C23C 1434

Patent

active

053565223

ABSTRACT:
A magnetic thin-film medium is disclosed. The medium includes a disc-like non-metallic substrate, and a sputtered underlayer having an axial composition gradient in which a lowermost stratum of the layer is a coating metal, such as Ti, V, or W, and an uppermost stratum of the underlayer is Cr. A magnetic thin-film layer is formed on the substrate, and a overcoat is formed on the magnetic layer. Also disclosed is a method of forming the medium.

REFERENCES:
patent: 4322276 (1982-03-01), Meckel et al.
patent: 4558388 (1985-12-01), Graves, Jr.
patent: 4626336 (1986-12-01), Bloomquist et al.
patent: 4786564 (1988-11-01), Chen et al.
patent: 4894133 (1990-01-01), Hedgcoth
patent: 5004652 (1991-04-01), Lal et al.
patent: 5084152 (1992-01-01), Lin
patent: 5134038 (1992-07-01), Baseman et al.

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