Magneto-optic recording media with protective layer

Details Magneto-optic recording media with protective layer Magneto-optic recording media with protective layer

1987-11-25

1989-08-29

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of metal

4271263, 427127, 4272551, 428692, 428693, 428694, 428698, 428701, 428702, 428900, G11B 721

Patent

active

048616710

ABSTRACT:
A protective layer for a magneto-optically active layer is formed of an outer impermeable layer and an inner layer that protects the active from the outer layer. The outer layer may be an oxide and the inner layer a non-oxide. The oxide and non-oxide layers may form discreet layers or they may be continuously graded. The graded layer may be formed by reactively sputtering aluminum in the presence of reactive gases, oxygen and nitrogen, while continually varying the flowing reactive gas from nitrogen to oxygen.

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patent: 4414650 (1983-11-01), Ohta et al.
patent: 4466035 (1984-03-01), Connell et al.
patent: 4478872 (1984-10-01), Pulliam
patent: 4497006 (1985-01-01), Deguchi et al.
patent: 4649451 (1987-03-01), Tomita
patent: 4658388 (1987-04-01), Ishiwatari et al.
patent: 4695510 (1987-09-01), Sawamura et al.
patent: 4711821 (1987-12-01), Kikuchi et al.
"New Concepts on Magneto-Optical Memories", Gueugnon et al, IEEE Transactions on Magnetics, vol. Mag. 19, No. 5, Sep. 1983, pp. 1754-1756.
"Magneto-Optical Memory Disk Using Plastic Substrate", Sato et al. SPIE vol. 529, Optical Mask Data Storage (1985), pp. 33-38.

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