Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Patent
1999-03-11
2000-10-17
Evans, Jefferson
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
360319, 360324, 3603242, G11B 539
Patent
active
061340898
ABSTRACT:
The present invention provides a thin film magnetoresistive current perpendicular to the plane read head device and method of fabrication. The structure of the thin film head of the present invention may comprise a lower pedestal shield, a lower sensor lead, a magnetoresistive structure, an upper sensor lead, and an upper pedestal shield. The sensor leads have a portion located between the pedestal and the magnetoresistive structure, and a portion lateral to the between portion. Either or both sensor leads may have a portion projecting from the lateral portion. The projecting portions provide greater cross-section to the lateral portion of the lead to decrease lead resistance without increasing the pedestal-to-pedestal distance. The projecting portions form recessed portions in the sensor leads for seating the pedestal. The projecting portions may abut the pedestals. The upper sensor lead may also have a portion projecting downward from its lateral portion to form a recessed portion for seating the magnetoresistive structure. The magnetoresistive structure may utilize giant magnetoresistive materials, and may employ any known structure, such as multilayer, spin valve, or other known types of magnetoresistive materials and structures. The present invention provides lower resistance sensor leads without increasing the distance between shield pedestals, thus allowing for high data density while improving the magnetoresistive effect.
REFERENCES:
patent: 5446613 (1995-08-01), Rottmayer
patent: 5627704 (1997-05-01), Lederman et al.
patent: 5668688 (1997-09-01), Dykes et al.
patent: 5731937 (1998-03-01), Yuan
patent: 5809636 (1998-09-01), Shouji et al.
patent: 5966012 (1999-10-01), Parkin
Rottmayer, Robert, Zhu, Jian-Gang, "A New Design For An Ultra-High Density Magnetic Recording Head Using A GMR Sensor In The CCP Mode," IEEE Transactions on Magnetics, vol. 31, No. 6, Nov. 1995, pp. 2597-2599.
Barr Ronald A.
Crue Bill W.
Zhao Ming
Evans Jefferson
Read-Rite Corporation
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