Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1987-03-06
1989-06-27
Niebling, John F.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
C23C 1400
Patent
active
048427080
ABSTRACT:
A magnetic recording medium conventionally utilizes the in-plane magnetization mode, but recently the perpendicular magnetization mode utilizing the perpendicular anisotropy of an hcp cobalt alloy layer, in which the C axis is oriented perpendicular to the layer surface, has been proposed. The known perpendicular magnetic recording medium is produced by means of RF sputtering and comprises a Permalloy layer, as layer of a low coercive-force material, between the nonmagnetic base and the hcp cobalt alloy layer. The perpendicular anisotropy attained by the present invention in very excellent and is superior to that of a perpendicular recording medium having no Permalloy layer because a Co-Ta alloy is used as the layer of a low coercive-force material.
REFERENCES:
patent: 3945903 (1976-03-01), Svendor et al.
patent: 4279678 (1981-11-01), Meckel
patent: 4324630 (1982-04-01), Sugita et al.
patent: 4331526 (1982-05-01), Kuehnle
patent: 4361472 (1982-11-01), Morrison
patent: 4401539 (1983-08-01), Abe et al.
patent: 4407894 (1983-10-01), Kadokura et al.
patent: 4441974 (1984-04-01), Nishikawa et al.
patent: 4582720 (1986-04-01), Yamazaki
Kadokura et al., "Deposition of Co-Cr Films for Perpendicular Magnetic Recording by Improved Opposing Targets Sputtering" IEEE Transactions on Magnetics, vol. Mag 17, No. 6 (Nov. 1981) pp. 3175-3177.
Norstrom, "The Electrical Characteristics of RF Magnetron and non-Magnetron Planar Systems" Pergamon Press, Jun. 1980, p. 225.
Naoe et al., "High Rate Deposition of Magnetic Films by Sputtering from Two Facing Targets" J. Crystal Growth 45, No. 1, Dec. 1978, p. 361.
Honjo Kazuhiko
Kadokura Sadao
Naoe Masahiko
Tomie Takashi
Marquis Steven P.
Niebling John F.
Teijin Limited
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