Magnetooptic layer and a process for its fabrication

Details Magnetooptic layer and a process for its fabrication Magnetooptic layer and a process for its fabrication

1994-04-07

1996-06-18

Kilman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428610, 428684ML, 428684SC, 4286846R, 428684NF, 428684MM, 428684T, 428684RF, 428684XS, 428900, 428638, 2041921, 2041922, 20419226, 363 13, G11B 566, B32B 516, C23C 1400

Patent

active

055276059

ABSTRACT:
A magnetooptic layer made from rare-earth metals and transition metals exhibits a gradient in the alloy composition over the layer depth, and has a coercive field strength of more than 8 kOe in the temperature range of .DELTA.T=100.degree. C. around the compensation temperature T.sub.comp. The layer is fabricated with a dynamic sputter process, in which the substrates to be coated are led past one or a plurality of sputter targets, arranged in a common plane parallel to the track of the substrates. A mask is located between the sputter targets and the substrates.

REFERENCES:
patent: 4293621 (1981-10-01), Togami
patent: 4649519 (1987-03-01), Sun et al.
patent: 4670356 (1987-06-01), Sato et al.
patent: 4694358 (1987-09-01), Muchnik et al.
patent: 4740430 (1988-04-01), Frankenthal et al.
S. Takayama, et al., "Magnetic and Magneto-Optical Properties of Tb-Fe-Co Amorphous Films", J. Appl. Phys. 61(7), Apr. 1, 1987, American Institute of Physics, pp. 2610-2616.
S. Asari, et al. "Preparation of a Magneto-Optical Disk Using a Rare Earth-Transition Metal Alloy Target", J. Vac. Sci. Technol. A5(4), Jul./Aug. 1987, pp. 1949-1951.
E. Schultheiss, et al., "Production Technology for Magnetooptic Data Storage Media", Solid State Technology/Mar. 1988, pp. 107-112.
Masahiko Takahash et al., "Study on Recorded Domain Characteristics of Magneto-Optical tbFeCo Disks," Journal of Applied Physics, vol. 64 (1), Jul. 1, 1988, pp. 262-269.
S. Takayama et al., "Magnetic and Magneto-Optical Properties of Tb-Fe-Co Amorphous Films," Journal of Applied Physics, vol. 61 (7), Apr. 1, 1987, pp. 2610-2616.
S. Asari et al., "Preparation of a Magneto-Optical Disk Using a Rare Earth-Transition Metal Alloy Target," J. Vac. Sci. Technol., vol. A 5 (4), Jul./Aug. 1987, pp. 1949-1951.
E. Schultheiss, "Production Technology for Magnetooptic Data Storage Media," Solid State Technology, Mar., 1988, pp. 107-112.
M. H. Kryder et al., "Stability of Perpendicular Domains in Thermomagnetic Recording Materials," pp. 236-241.

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