Method of making an induction and magnetoresistance type composi

Details Method of making an induction and magnetoresistance type composi Method of making an induction and magnetoresistance type composi

1996-06-25

1998-03-03

Vo, Peter

Metal working

Method of mechanical manufacture

Electrical device making

2960315, 2960316, 360113, 360122, 427131, G11B 5127

Patent

active

057221570

ABSTRACT:
In an induction- and MR-type composite magnetic head of the type that one of two shield films of an MR-type magnetic head serves as one of two cores of an induction-type magnetic head, conductive leads are thicker than an MR element so that steps are formed at the boundaries between an MR element sensitive region and the conductive leads. An upper gap layer has a constant thickness and has a recess 56 on its upper surface because of topographical transfer of the underlying steps. An upper shield--lower core layer has a downward convex at its lower surface, because of topographical transfer of the recess on the upper surface of the upper gap layer. However, the upper surface of the upper shield--lower core layer is flat and parallel to the MR element. Therefore, a write gap layer formed thereon is made flat and parallel to the MR element. Steps of the write gap can be removed and a record density can be increased.

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