Magnetic recording medium with low temperature seedlayer for hig

Details Magnetic recording medium with low temperature seedlayer for hig Magnetic recording medium with low temperature seedlayer for hig

1998-11-10

2000-10-31

Kiliman, Leszek

Stock material or miscellaneous articles

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Physical dimension specified

428336, 428694TS, 428900, 427128, 427129, 427130, 2041922, G11B 566

Patent

active

061399515

ABSTRACT:
A magnetic recording medium exhibiting high remanent coercivity and low noise is produced by depositing a first NiAl seedlayer on a non-magnetic substrate, e.g., glass, ceramic or glass-ceramic material, at a relatively low temperature, and subsequently depositing a second NiAl seedlayer on the first seedlayer at a relatively higher temperature. Embodiments include depositing a first NiAl seedlayer at a temperature less than about 120.degree. C., e.g., less than about 100.degree. C., and depositing a second NiAl seedlayer thereon at a temperature greater than about 200.degree. C., e.g. greater than about 230.degree. C. Embodiments also include depositing a Cr-alloy underlayer, CrV, on the second seedlayer.

REFERENCES:
patent: 5846648 (1998-12-01), Chen
patent: 5858566 (1999-01-01), Zhang
patent: 5879783 (1999-03-01), Chang
patent: 6010795 (2000-01-01), Chen
"NiA1 Underlayers for CoCrTa Magnetic Thin Films", L. Lee, et al., IEEE Transactions On Magnetics, vol. 30, No. 6, Nov. 1994, pp. 3951-3953.
"The Role of NiA1 Underlayers in Longitudinal Recording Media" (abstract), C. Ross, et al., Journal of Applied Physics, vol. 81, No. 8, Apr. 15, 1997. p. 4369.

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