Thin film MR head and method of making wherein pole trim takes p

Details Thin film MR head and method of making wherein pole trim takes p Thin film MR head and method of making wherein pole trim takes p

1998-01-30

1999-12-07

Breneman, Bruce

Metal working

Method of mechanical manufacture

Electrical device making

2960307, 216 22, G11B 5127

Patent

active

059962135

ABSTRACT:
A method of manufacturing a thin film merged magnetic head including an inductive write structure and a magnetoresistive sensor uses a patterned protection layer to protect a second shield/bottom pole layer in regions spaced from the pole tip of the inductive write structure. A window is provided in the protection layer. During manufacture, the configuration comprises a first shield layer, a magnetoresistive element, a second shield layer serving as a bottom pole, a protection layer, a protection window, a write gap, a top pole, and a pole tip structure. The use of a protection layer and window results in the formation of channels in the second shield layer adjacent to a pedestal that supports the inductive write structure. The channels prevent magnetic flux from extending toward the second shield layer beyond the width of the pole tip structure. This structure reduces side writing with a consequent improvement in off-track performance. The width of the second shield layer allows the magnetoresistive element to be shielded.

REFERENCES:
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patent: 5385637 (1995-01-01), Thayamballi
patent: 5438747 (1995-08-01), Krounbi et al.
patent: 5761013 (1998-06-01), Lee et al.
patent: 5843521 (1998-12-01), Ju et al.
patent: 5878481 (1999-03-01), Feng et al.

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