Method and apparatus making magnetic recording disk

Details Method and apparatus making magnetic recording disk Method and apparatus making magnetic recording disk

1988-06-22

1990-01-16

Nguyen, Nam X.

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

20419216, 20429815, 20429825, 20429826, 51281SF, 51135R, 414222, C23C 1434, B65H 100

Patent

active

048941336

ABSTRACT:
A sputtering production assembly for producing a magnetic thin-film memory disk and a method of coating the memory disk is provided. The magnetic disk substrates are preliminarily abraded to provide a uniform series of physical circumferential texturing to encourage a circular anisotropic orientation of crystal growth during the subsequent sputtering steps. A nucleating layer is deposited under controlled conditions, and subsequently a thin-film magnetic layer is deposit with a circular anisotropic orientation of crystal growth. Finaly, a thin-film protective coating is disposed on the magnetic layer.

REFERENCES:
patent: 3945903 (1976-03-01), Svendor et al.
patent: 4735840 (1985-11-01), Hedgcoth
patent: 4749465 (1988-06-01), Flint et al.
User's Manual of Tencor Instruments "Alpha-Step 200" pp. 32-35.

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