Magneto-optical recording medium and method for making the same

Details Magneto-optical recording medium and method for making the same Magneto-optical recording medium and method for making the same

1991-03-22

1997-12-16

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428694ML, 428694DE, 428694RL, 428694RE, 428694MT, 428900, 2041921, 20419214, 20419215, 20419216, 2041922, 20419226, 20419227, G11B 566, C23C 1400

Patent

active

056983123

ABSTRACT:
A magneto-optical recording medium comprises a recording layer and a reflection metal layer, which are overlaid in this order on a transparent substrate. The reflection metal layer primarily contains Al or an alloy of Al and is formed by carrying out a sputtering process in an atmosphere, in which the content of residual hydrogen gas is not higher than 10,000 ppm with respect to the amount of an inert gas. Alternatively, a recording layer is formed by carrying out a sputtering process in an inert gas atmosphere, in which the content of residual hydrogen gas is not higher than 1,000 ppm with respect to the amount of an inert gas. As another alternative, a magneto-optical recording medium comprises a first protective dielectric layer, a recording layer, and a second protective dielectric layer, which are overlaid in this order on a transparent substrate. The first protective dielectric layer and/or the second protective dielectric layer is formed by carrying out a sputtering process in an inert gas atmosphere, in which the content of residual hydrogen gas is not higher than 1,000 ppm with respect to the amount of an inert gas.

REFERENCES:
patent: 4125446 (1978-11-01), Hartsough et al.
patent: 4444635 (1984-04-01), Kobayashi
patent: 4680742 (1987-07-01), Yamada et al.
patent: 4719137 (1988-01-01), Ohta et al.

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