Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1993-02-18
1995-10-03
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Hall effect
360 66, G11B 509, G11B 5127, G11B 533
Patent
active
054557305
ABSTRACT:
A contact magnetic recording rigid disk file utilizes a magnetoresistive (MR) sensor for reading data recorded on the disk. The disk file may be of the liquid-bearing type of contact recording with the MR sensor supported on the trailing end of a carrier which rides on the liquid bearing. The performance of the disk file is enhanced by including means for minimizing the effect of a discovered baseline read signal modulation. The modulation has been determined to be caused by variable cooling of the temperature-sensitive and temperature-elevated MR sensor by the disk, with the temperature variation being directly related to the variation in head-disk spacing caused by the waviness of the surface of the disk. A filter may be incorporated into the read signal processing circuitry of the disk file to eliminate the modulation, the MR sensor may be designed to operate at selected parameters to minimize the effect of the baseline modulation, and the portion of the carrier in contact with the disk surface may be selected to have a length less than the period of the disk waviness so that it more closely follows the disk surface topography.
REFERENCES:
patent: 2969435 (1961-01-01), Lynott
patent: 3908194 (1975-09-01), Romankiw
patent: 4040113 (1977-08-01), Gorter
patent: 4122505 (1978-10-01), Kuijk
patent: 4167765 (1979-09-01), Watrous
patent: 4225892 (1980-09-01), Bassett et al.
patent: 4605977 (1986-08-01), Matthews
patent: 4625249 (1986-11-01), Iwata
patent: 4669011 (1987-05-01), Lemke
patent: 4706138 (1987-11-01), Jove et al.
patent: 4786993 (1988-11-01), Jove et al.
patent: 4819091 (1989-04-01), Brezoczky et al.
patent: 4914398 (1990-04-01), Jove et al.
patent: 5041932 (1991-08-01), Hamilton
patent: 5072320 (1991-12-01), Ezaki et al.
patent: 5097368 (1992-03-01), Lemke et al.
patent: 5200867 (1993-04-01), Albrecht et al.
patent: 5202803 (1993-04-01), Albrecht et al.
IBM Technical Disclosure Bulletin Bajorek et al vol. 18 No. 2 Jul. 1975 "Negative Temperature Coefficient Material for MR Element Thermal Noise" p. 540.
IBM Technical Disclosure Bulletin, Arnold et al vol. 22 No. 5 Oct. 1979 pp. 2149-2150 "Wear-Resistant Substrates with Good Thermal Conductivity".
Dovek Moris M.
Foster John S.
Lam Donald K. F.
Sawatzky Erich
Berthold Thomas R.
International Business Machines - Corporation
Klimowicz William J.
Levy Stuart S.
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