Registers – Coded record sensors – Particular sensor structure
Patent
1991-10-29
1995-01-03
Callahan, Tinmothy P.
Registers
Coded record sensors
Particular sensor structure
360113, G06K 708, G11B 5127
Patent
active
053788850
ABSTRACT:
A new and improved unshielded horizontal magnetoresistive head is disclosed which utilizes multiple pairs of magnetoresistive elements. The present invention provides a device which is characterized by reduced output signal undershoot amplitudes, and an increased central peak pulse amplitude, while not significantly affecting the resolution of the device. The device is also characterized by increased signal to noise and signal to interference ratios. Magnetoresistive elements utilized in the device may be fabricated and/or manufactured by simplified processes, resulting in fabrication, manufacturing and cost benefits for the magnetoresistive head. Any number of additional magnetoresistive element pairs may be utilized dependent on the accuracy and resolution required by the specific application.
REFERENCES:
patent: Re33383 (1990-10-01), Lazzari
patent: 4465925 (1984-08-01), Goi
patent: 4473799 (1984-09-01), Favre
patent: 4487306 (1984-12-01), Nao et al.
patent: 4523330 (1985-06-01), Cain
patent: 4588292 (1986-05-01), Collins
patent: 4628194 (1986-12-01), Dobbins et al.
patent: 4703378 (1987-10-01), Imakoshi et al.
patent: 4723072 (1988-02-01), Naruse
patent: 4737649 (1988-04-01), Naruse
patent: 4749087 (1988-06-01), Buttifant
patent: 4916295 (1990-04-01), Chominski
patent: 4988850 (1991-01-01), Masuda et al.
patent: 5155643 (1992-10-01), Jones, Jr. et al.
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5166849 (1992-11-01), Fedeli
patent: 5193038 (1993-03-01), Smith
Cheatham et al, "Magnetoresistive Head Element", IBM Technical Disclosure Bulletin, vol. 19, No. 7, Dec. 1976, pp. 2430-2431.
Schwarz, "Signal Sampling of Pulse-Biased Mr Head", IBM Technical Disclosure Bulletin, vol. 19, No. 8, Jan. 1977, pp. 3222-3223.
Chapman et al, "A New Horizontal M-R Head Structure," IEEE Transactions on Magnetics, vol. 25, No. 5, Sept. 1989.
Chapman, "A New Approach to Making Thin Film Head-Slider Devices," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989.
Indeck et al, "A Magnetoresistive Gradiomenter," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988.
Kelley et al, "High-Track-Density Coupled Film Magnetoresistive Head," IEEE Transactions on Magnetics, vol. Mag-17, No. 6, Nov. 1981.
O'Day, "Balanced Magnetic Head," IBM Technical Disclosure Bulletin, vol. 15, No. 9, Feb. 1973.
Lazzari et al, "A New Thin Film Head Generation IC Head," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989.
Heim, "The Sensitivity Function for Shielded Magnetoresistive Heads by Conformal Mapping," IEEE Transactions on Magnetics, vol. Mag-19, No. 5, Sep. 1983.
Gill et al, "A Magnetoresistive Gradiometer for Detection of Perpendicularly Recorded Magnetic Transactions," Journal of Applied Physics, vol. 65, No. 1, Jan. 1, 1989.
Van Ooyen et al, "Magnetoresistance in Laminated NiFe Films," Journal of Applied Physics, vol. 53, No. 3, Part II, Mar. 1982.
Mallison, "`Gradiometer Head` Pulse Shapes," IEEE Transactions on Magnetics, vol. 26, No. 2, Mar. 1990.
Kelley et al, "Dual Element Unshielded Hall Head," IEEE Transactions on Magnetics, vol. Mag-20, No. 5, Sep. 1984.
Pohm et al, "0.075, 1.25 and 2.0 .mu.m Wide M-R Transducers," Journal of Magnetism and Magnetic Materials, vols. 54-57, Part III, Feb. 1986.
Jeffers, "High Density Magnetic Recording Head," Proceedings of the IEEE, vol. 74, No. 11, Nov. 1986.
Guzman Javier I.
Jones Jr. Robert E.
Kryder Mark H.
Mountfield Keith R.
Callahan Tinmothy P.
Mars Incorporated
Phan Trong
LandOfFree
Unshielded magnetoresistive head with multiple pairs of sensing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Unshielded magnetoresistive head with multiple pairs of sensing , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unshielded magnetoresistive head with multiple pairs of sensing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2212746