Magnetic head

Details Magnetic head Magnetic head

2005-12-27

2005-12-27

Watko, Julie Anne (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

06980402

ABSTRACT:
The object of the present invention is to provide a magnetoresistive magnetic head having good, stable playback characteristics. In an MR head wherein an MR element is interposed between a lower shield layer and an upper shield layer, separated by non-magnetic layers. The lower shield layer and the upper shield layer are formed from a material having high permeability and high resistivity. Since the magnetic shield layers are formed from materials having high permeability and high resistivity, even if friction causes dragging of the head surface, there is effectively no short circuit between the magnetic shield layer and the magnetic element.

REFERENCES:
patent: 6177207 (2001-01-01), Koike
patent: 2003/0147184 (2003-08-01), Lee et al.
“High Resistivity, High Permeability Shield Spacers for Magnetoresistive Head”, IBM TDM, Dec. 2000, No. 440, pp. 2191.
S. Ohnuma, (The Research Institute of Electric and Magnetic Materials, Sendai), H. Fujimori (Institute for MaterialsResearch, Tohoku University, Sendai); Magnetic Properties of Granular Co based films (p. 7-13,) Jun. 14, 1995?.

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