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Magnetoresistive Read/Write Head

IP.com Disclosure Number: IPCOM000077724D
Original Publication Date: 1972-Sep-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Brock, GW: AUTHOR [+3]

Abstract

A magnetoresistive read/write head may be designed to utilize an efficient pulse writing current. This design permits write/wide - read/ narrow operation and simultaneous write checking.

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Magnetoresistive Read/Write Head

A magnetoresistive read/write head may be designed to utilize an efficient pulse writing current. This design permits write/wide - read/ narrow operation and simultaneous write checking.

One or more magnetoresistive (MR) read/write heads may be formed on a ferrite substrate, as shown in Fig. 1. The MR element used only during the read operation is positioned as close to the media as possible, while the write conductors (which can be made wider than the MR element if write/wide - read/narrow operation is desired) may be placed further back. A gap is formed by covering the head elements of Fig. 1 with ferrite, as shown in Fig. 2.

The write conductors may be driven with current sufficient to convey information to the media without overheating the thin conductor or otherwise damaging the head, by utilizing the recording technique described in the IBM Technical Disclosure Bulletin article entitled "Pulsed-Field Magnetic Recording" by F. Ainscow, published November, 1970, on page 1613. Typical pulses of this type are shown in Fig. 3. Inasmuch as separate reading and writing elements are provided in this head, it is possible, during the interval T, to use the magnetoresistive element for sensing data previously recorded by the conductor. Thus, while the write head is switched off, the reading element may be monitoring that information was, in fact, recorded on the media.

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