Thin film magnetic recording film

Details Thin film magnetic recording film Thin film magnetic recording film

1986-04-21

1986-12-23

Pianalto, Bernard D.

Coating processes

Magnetic base or coating

Magnetic coating

427132, H01F 1002

Patent

active

046312021

ABSTRACT:
A thin film magnetic recording disc is provided wherein the magnetic layer is an alloy of cobalt and platinum disposed on a chromium layer. A barrier layer of chromium is formed on the cobalt-platinum film and a wear layer of an oxide of cobalt is provided on the barrier layer. The platinum content in the magnetic film is varied so as to provide a magnetic film with a desired coercivity which is significantly less dependent upon film thickness. This permits the cobalt-platinum film thickness to be adjusted to meet a wide range of recording system design parameters. The coercivity of the magnetic film may be determined primarily by the amount of platinum in the alloy and the saturation magnetization-thickness product of the film is determined primarily by the film thickness.

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