Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1991-08-02
1993-07-13
Thibodeau, Paul J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
428900, 428928, 428 64, 428694TM, 428667, 360103, 360113, 360135, G11B 500
Patent
active
052272125
ABSTRACT:
An improved CoPt based or CoNi based alloy magnetic recording disk for horizontal recording has a magnetic recording layer which is a laminated structure of relatively thin magnetic alloy films separated by relatively thin non-magnetic spacer films. The resulting laminated disk structure has substantially decreased intrinsic media noise at high linear recording densities. A magnetic recording disk drive uses the low noise laminated disk and and a magnetoresistive read sensor to provide a disk drive with significantly reduced noise in the data readback signal.
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Katayama, S. et al. "Magnetic Properties and Read Write Characteristics of Multilayer Films on a Glass Substrate" IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988.
Hata, et al., "Low-Noise Media Using Double-layer CoNiCr Thin Films For Longitudinal Recording," J. Appl. Phys. 67(9), 1 May 1990, pp. 4692-4694.
Murdock, et al., "Noise Properties of Multilayered Co-alloy Magnetic Recording Media," IEEE Trans. on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2700-2705.
Lambert, et al., "Reduction of Media Noise in Thin Film Metal Media By Lamination," IEEE Trans on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2706-2708.
Ahlert Richard H.
Howard James K.
Lambert Steven E.
Sanders Ian L.
Berthold Thomas R.
International Business Machines - Corporation
Resan Steven A.
Thibodeau Paul J.
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