Smooth-surfaced magnetic recording medium

Details Smooth-surfaced magnetic recording medium Smooth-surfaced magnetic recording medium

C - Chemistry, Metallurgy

23

C

204/96.06, 352/3

C23C 14/34 (2006.01) C23C 14/16 (2006.01) C23C 14/18 (2006.01) G11B 5/66 (2006.01) G11B 5/73 (2006.01) G11B 5/84 (2006.01) G11B 5/851 (2006.01)

Patent

CA 2024867

ABSTRACT A high-density thin-film magnetic disc and method of producing the disc. In forming the disc, chromium is sputtered onto a smooth-surfaced, non-metallic substrate, such as a glass substrate, first at room temperature, to form a substratum with a random structure, then at a high temperature, to form a chromium underlayer with anisotropic crystal orientation. A cobalt-based alloy is sputtered onto the underlayer to form the thin film magnetic layer. The disc has high coercivity, low bit shift, and can be operated at a flying height of between 2-4 µinches.

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