Magnetic recording medium comprising a substrate, magnetic layer

Details Magnetic recording medium comprising a substrate, magnetic layer Magnetic recording medium comprising a substrate, magnetic layer

1995-12-20

1998-03-24

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428336, 428408, 428433, 428457, 428611, 428641, 428670, 428694TS, 428694TC, 428694ST, 428900, G11B 566

Patent

active

057310700

ABSTRACT:
A magnetic recording medium comprised of (i) a non-magnetic substrate such as glass or carbon, (ii) a silicon layer preferably having a thickness of about 20-3,000 angstroms, formed on the substrate, (iii) a layer composed of at least one element of the platinum group of the periodic table or its alloy or carbon, formed on the silicon layer, wherein the platinum group element or alloy is at least partially silicified with silicon diffusing from the adjacent silicon layer, and the carbon is rendered at least partially amorphous with silicon diffusing from the adjacent silicon layer, (iv) an undercoat composed of chromium or its alloy, formed on the layer of a platinum group element or alloy or carbon, (v) a magnetic layer composed of a cobalt alloy, formed on the undercoat, (vi) a protective carbon overcoat formed on the magnetic layer, and (vii) an optional lubricating layer formed on the protective overcoat.

REFERENCES:
patent: 4647494 (1987-03-01), Meyerson et al.
patent: 4722869 (1988-02-01), Honda et al.

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