MAGNETO OPTIC RECORDING MEDIUM WITH HYDROGENATED SILICON CARBIDE DIELECTRIC

摘要

42669 CAN 9A MAGNETO OPTIC RECORDING MEDIUM WITH HYDROGENATED SILICON CARBIDE DIELECTRIC A magneto optic recording medium comprises a substrate, an amorphous magnetizable rare earth-transition metal alloy layer, and a transparent dielectric layer on at least one side of the magnetizable layer. The dielectric layer comprises hydrogenated silicon carbide of the formula (SiCX)1-yHy, in which x is greater than 1.0 and y is greater than zero. 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, and hydrogenated by introducing a trace amount of a hydrogen source (usually water vapor) into the sputtering chamber. The medium exhibits similar or improved characteristics over media constructed with present materials, for example, silicon suboxide (SiOy, y<2).