Magneto-optical recording medium and method of making same

Details Magneto-optical recording medium and method of making same Magneto-optical recording medium and method of making same

1984-05-23

1986-03-18

Robinson, Ellis P.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204192P, 365122, 360114, 428694, 428693, 428900, 428928, 427131, 427132, 428678, C23C 1500, G11B 564

Patent

active

045766991

ABSTRACT:
An improved magneto-optical recording medium and a method of making the same, the medium including a substrate base and a magneto-optical recording layer formed on the base and composed of a plurality of layers each of which contains a rare earth metal and a transition metal. The relative concentration ratio between the rare earth metal and the transition metal in the layers varies cyclically in the direction of the thickness of the magneto-optical recording layer. The recording medium is conveniently manufactured by simultaneously depositing the transition metal and the rare earth metal by co-sputtering the two metals on a base and providing relative movement between the base and the metal sources during co-sputtering to produce the multilayer recording structure.

REFERENCES:
patent: 3229273 (1966-01-01), Baaba
patent: 4042341 (1977-08-01), Smeggil
patent: 4210946 (1980-07-01), Iwasaki
patent: 4277809 (1981-07-01), Fisher
patent: 4293621 (1981-10-01), Togami
patent: 4367257 (1983-01-01), Arai

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