Magneto-optical recording medium and manufacturing thereof

Details Magneto-optical recording medium and manufacturing thereof Magneto-optical recording medium and manufacturing thereof

1987-08-27

1989-05-23

Thibodeau, Paul J.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

2041922, 427128, 427129, 428694, 428900, 365122, 369 13, 369288, G11B 724

Patent

active

048329800

ABSTRACT:
According to a disk-shaped magneto-optical recording medium of the invention, a transparent thin film serving as an interference layer is formed on a transparent substrate. The thin film is subjected to a plasma surface treatment, thereby decreasing the fused oxygen content in at least a surface portion thereof. A recording layer of a rare-earth-transition metal amorphous ferrimagnetic alloy thin film is formed on the plasma surface-treated film. Since the content of active, fused oxygen contained in at least the surface portion of the film decreases, rare-earth element oxide can hardly be formed in a boundary region between the recording layer and the transparent thin film. The content of the rare-earth element in this region is smaller than the average content in the overall recording layer.

REFERENCES:
patent: 4569881 (1986-02-01), Fneese et al.
patent: 4615944 (1986-10-01), Gardner
Digests of 7th Annual Conference on Magnetics in Japan, 1983-11, 9pA-6, Hando et al.

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