Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1997-03-21
1998-12-22
Kiliman, Leszek
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428336, 428694T, 428694TS, 428694TR, 428697ST, 428694SG, 428900, G11B 566
Patent
active
058516280
ABSTRACT:
In a magnetic recording medium in which at least Cr or Cr-alloy base layer and Co-alloy magnetic layer are formed in this order on a substrate, a seed layer is provided between the substrate and the base layer. In a preferred embodiment, the seed layer is made of a material selected from Al--Co, Cu--Si, Ni--Ga, Cu--Be, Mn--V, Ni--Zn and Fe--V each having a specific composition. Where the substrate is formed of a glass material, the base layer and magnetic layer are formed by sputtering on the substrate while the substrate is kept at a temperature of 150.degree. to 300.degree. C. and a bias voltage of -300 to 0 V is applied to the substrate.
REFERENCES:
patent: 5316631 (1994-05-01), Ando
patent: 5496606 (1996-03-01), Mizukami
patent: 5605733 (1997-02-01), Ishikawa
patent: 5650237 (1997-07-01), Satoh
patent: 5700593 (1997-12-01), Okumura
"Effects of CR Intermediate Layers on CoCrPt Thin Film Media on NiAl Underlayers", Lee et al., IEEE Transactions on Magnetics, vol. 31, No. 6, Nov. 1995.
Ohkubo Keiji
Takizawa Naoki
Fuji Electric & Co., Ltd.
Kiliman Leszek
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