Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1994-02-10
1996-02-20
Kilman, L.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428 654, 428 655, 428 656, 428 657, 428336, 428611, 428627, 428663, 428667, 428670, 428694T, 428694TS, 428694TP, 428694ST, 428900, 2041921, 20419714, 20419215, 2041922, B32B 302, G11B 566, C23C 1400
Patent
active
054927455
ABSTRACT:
A magnetic recording medium comprising a non-magnetic substrate and a magnetic alloy layer formed on the substrate with a non-magnetic primer layer containing chromium as the main component interposed therebetween, wherein the magnetic alloy layer contains cobalt and nickel as the main components and not more than 8 atomic % of boron and has been formed by sputtering under such a condition that a negative bias voltage is applied to the non-magnetic substrate.
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A. J. Griest and B. L. Flur, "Properties of Manganese-Permalloy Films", Journal of Applied Physics, vol. 38, No. 3, Mar. 1, 1967, pp. 1431 to 1433.
L. F. Herte and A. Lang, Jr., "Effect of ion bombardment during deposition on magnetic film properties", J. Vac. Sci. Technol., vol. 18, No. 2, Mar. 1981, pp. 153 to 155.
N. Tani et al, "Effects of Substituted Elements into the Cr Layer on CoNiCr/Cr Sputtered Hard Disk", Degests of Intermag '89 Conference, HA-8, 1989.
S. L. Duan et al, "Effect of Sputtering conditions, Annealing and the Microstructure of Cr Underlayer on the Magnetic Properties of CoNiCr/Cr Thin Films", IEEE Trans. on Magn., vol. 25, No. 5, Sep. 1989, pp. 3884 to 3886.
Kilman L.
Mitsubishi Chemical Corporation
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