Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-06-13
2006-06-13
Letscher, George J. (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
Reexamination Certificate
active
07061727
ABSTRACT:
A magnetoresistive includes a magnetoresistive layer which converts magnetic signals to electric signals and a pair of electrodes for allowing an electrically sensing current to flow across the magnetoresistive layer is made between an upper shield and an under shield with upper gap layer and under gap layer intervening between the magnetoresistive layer and the shields. By using a multi-layered varistor film or films of a material such as ZnO, SiC, SrTiO, Si etc. in combination with an insulating material SiO2, A1203, etc. to connect the magnetoresistive element to the shields and interconnect both electrodes, a magnetoresistive head which withstands breakdown even if the insulating gap layers are made thinner is provided.
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IBM Technical Disclosure Bulletin. “Magnetoresistive Head with Integrated Varistor for ESD/EOS Protection.” Apr. 1, 2000. IBM. Issue No. 432. Page No. 751.
IBM Technical Disclosure Bulletin. “Magnetoresistive Head with Integrated Varistor Employing Combined Varistor, Antiferromagneti Seed/Gap and Grounded First Shield.” Apr. 1, 2000. IBM. Issue No. 432. Page No. 751.
Hoshino Katsumi
Hoshiya Hiroyuki
Hitachi , Ltd.
Letscher George J.
Magee Christopher R.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
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