Magnetic recording medium with a MgO sputter deposited seed laye

Details Magnetic recording medium with a MgO sputter deposited seed laye Magnetic recording medium with a MgO sputter deposited seed laye

1995-11-06

1998-09-01

Resan, Stevan A.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428 653, 428336, 428471, 428668, 428673, 428674, 428694TS, 428694TP, 428694TM, 428900, 360103, 360135, G11B 566

Patent

active

058009310

ABSTRACT:
The present invention provides a longitudinal magnetic recording media having a substrate, a sputter deposited MgO seed layer, a Co or Co alloy based magnetic layer and an underlayer disposed between the seed layer and the magnetic layer comprised of Cr, a Cr alloy or a material having a B2 ordered crystalline structure, preferably NiAl or FeAl. A thin Cr or Cr alloy intermediate layer of about 1.0 nm to 5.0 nm thick may be positioned between the underlayer and the magnetic layer.

REFERENCES:
patent: 3615911 (1971-10-01), Nesbitt et al.
patent: 4287225 (1981-09-01), Kneller et al.
patent: 4560624 (1985-12-01), Guttner et al.
patent: 4652499 (1987-03-01), Howard
patent: 4735840 (1988-04-01), Hedgcoth
patent: 4820584 (1989-04-01), Morita et al.
patent: 4833020 (1989-05-01), Shiroishi et al.
patent: 4883711 (1989-11-01), Shiroishi et al.
patent: 4902583 (1990-02-01), Brucker et al.
patent: 5057200 (1991-10-01), Lal et al.
patent: 5062021 (1991-10-01), Ranjan et al.
patent: 5118564 (1992-06-01), Shinohara et al.
patent: 5147732 (1992-09-01), Shiroishi et al.
patent: 5192626 (1993-03-01), Sekiya et al.
patent: 5231294 (1993-07-01), Takeuchi et al.
patent: 5344706 (1994-09-01), Lambeth et al.
patent: 5363794 (1994-11-01), Lairson et al.
patent: 5403547 (1995-04-01), Smith et al.
K. Hono, B. Wong, and D.E. Laughlin, Crystallography of Co/Cr Bilayer Magnetic Thin Films, Nov. 1, 1990, J. Appl. Phys. 68 (9), 1990 American Institute of Physics, pp. 4734-4740.
N. Tani, M. Hashimoto, Y. Murata, M. Ishikawa, Y. Ota, and K. Nakamura, Effects of Substituted Elements Into the Cr Layer on a CoNiCr/Cr Sputtered Hard Disk, Jun. 15, 1990, J. Appl. Phys. 67 (12), 1990 American Institute of Physics, pp. 7507-7509.
Rajiv Ranjan, Beta Tungsten Underlayer for Low-noise Thin-film Longitudinal Media, May 1, 1990, J. Appl. Phys. 67, (9), 1990 American Institute of Physics, pp. 4698-4700.
T. Kogure and S. Katayama, High-Coercivity Magnetic Hard Disks Using Glass Substrates, May 1, 1990, J. Appl. Phys. 67 (9), 1990 American Institute of Physics, pp. 4701-4703.
Jack H. Judy, Thin Film Recording Media, Mar. 1990, MRS Bulletin, pp. 63-72.
B.R. Natarajan and E.S. Murdock, Magnetic and Recording Properties of Sputtered Co-P/Cr Thin Film Media, Nov. 1988, IEEE Transactions of Magnetics, vol. 24, No. 6, pp. 2724-2726.
J.A. Christner, R. Ranjan, R.L. Peterson, and J.I. Lee, Low-Noise Metal Medium for High-Density Longitudinal Recording, Apr. 15, 1988, J. Appl. Phys. 63 (8), 1988 American Institute of Physics, pp. 3260-3262.
Nathan R. Belk, Peter K. George, and Greg S. Mowry, Measurement of the Intrinstic Signal-To-Noise Ratio for High-Performance Rigid Recording Media, Jan. 15, 1986, J. Appl. Phys. 59 (2), 1986 American Institute of Physics, pp. 557-563.
J.K. Howard, Thin Films for Magnetic Recording Technology: A Review, Critical Review, Jan./Feb. 1986, J. Vac. Sci. Technol. A, vol. 4 No. 1, pp. 1-13.
Jacques Daval and Denis Randet, Electron Microscopy on High-Coercive-Force Co-Cr Composite Films, Dec. 1970, IEEE Transactions of Magnetics, vol. Mag.-6, No. 4, pp. 768-207.
E. Y. Chuang and W. Tang, Elimination of CFC in Thin-Film Disk Manufacturing, Third Quarter Aug. 1991, Access Selected Topics in Storage Technology, IBM San Jose, vol. V, No. 3, pp. 1-12.
Masaaki Futamoto, Mikio Suzuki, et al., Magnetic and Recording Characteristics of Bicrystalline Longitudinal Recording Medium Formed on an M.sub.g O Single Crystal Disk Substrate, IEEE Transactions on Magnetics, vol. 30, No. 6, Nov. 1994, p. 3975.
T. Yamashita, L.H. Cham et al., Sputtered Ni.sub.x P Underlayer for CoPt-Based Thin Film Magnetic Media, IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991.
Atsushi Nakamura and Masaaki Futamoto, Epitaxial Growth of Co/CR Bilayer Films on M.sub.g O Single Crystal Substrates, Jpn. J. Appl. Phys. vol. 32, Oct. (1993), Pt. 2, No. 10A, L1410.
R. Ranjan, D. N. Lambeth, M. Tromel, P. Goglia and Y. Li, Laser Texturing For Low-Flying-Height Media, J.Appl. Phys. 69 (8), 15 Apr. 1991, p. 5745.

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