Magneto optic recording medium with silicon carbide dielectric

Details Magneto optic recording medium with silicon carbide dielectric Magneto optic recording medium with silicon carbide dielectric

1989-05-25

1992-10-27

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

365122, 369 13, 428900, G11B 564

Patent

active

051588340

ABSTRACT:
A magneto optic recording medium comprising a substrate, an amorphous magnetizable rare earth-transition metal alloy layer, a transparent dielectric layer on at least one side of the magnetizable layer, and a reflective surface located to reflect light through the magnetizable alloy layer. The dielectric layer is comprised of silicon carbide of the formula SiC.sub.x, wherein x, the molar ratio of carbon to silicon, is greater than 1. The dielectric layer is preferably deposited by direct current magnetron sputtering at low argon partial pressure from an electrically conductive mixture of silicon carbide and carbon. The medium exhibits similar or improved characteristics over media constructed with present dielectrics, for example, silicon suboxide (SiO.sub.y, y<2).

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