Dynamic magnetic information storage or retrieval – Head – Hall effect
Patent
1990-01-29
1992-01-07
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Head
Hall effect
360 7701, 360 7706, G11B 539, G11B 558
Patent
active
050796631
ABSTRACT:
A magnetoresistive (MR) sensor is center tapped to provide the difference signals for servo operation on data and sum signals for the data information. The center-tap of the MR sensor is made of a high resistivity material compared to the resistivity of the MR element itself such as tantalum, Nichrome and carbon. Processes which can be used to produce the high resistivity center-tap conductor include an insulator layer to define both the track width and the center-tap conductor and a sequence which first patterns the MR sensor and then masks to define the conductor regions.
REFERENCES:
patent: 3918091 (1975-11-01), Walraven et al.
patent: 4012781 (1977-03-01), Lin
patent: 4633344 (1986-12-01), Jeffers
patent: 4814919 (1989-03-01), Kitada et al.
patent: 4851944 (1989-07-01), Mowry
D. H. Martin, "Data-Track-Following Servo System", IBM Technical Disclosure Bulletin, vol. 19, No. 8, Jan. 1977, pp. 3228-3229.
Ju Kochan
Krounbi Mohamad T.
Wang Po-Kang
International Business Machines - Corporation
Pershon James A.
Psitos Aristotelis
Robertson David L.
Schmid, Jr. Otto
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