Magnetoresistive read head with back filled gap insulation layer

Details Magnetoresistive read head with back filled gap insulation layer Magnetoresistive read head with back filled gap insulation layer

1996-01-22

1997-04-01

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Hall effect

360126, G11B 539

Patent

active

056172770

ABSTRACT:
A magnetic disk storage system with high linear resolution magnetoresistive (MR) head or heads comprising a dielectric substrate, a first magnetic shield, a first gap insulation layer, an MR stripe element, conductive leads, a second gap insulation layer, and a second magnetic shield. Back-fill layers of insulation material are deposited on the first gap insulation layer adjacent the MR element and/or on the second gap insulation layer in thicknesses substantially sufficient to at least in part replace insulation material removed during the various processing steps to ensure against short circuiting of the MR element. The MR element preferably is a trilayer comprising a soft MR sensing layer biased at an acute angle to the lengthwise dimension of the element but free to rotate therefrom according to the magnitude and direction of applied magnetic field; a soft magnetic or hard magnetic layer with magnetization fixed in a direction perpendicular to the lengthwise direction of the MR element; and a spacer layer separating these two layers.

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