Method for fabricating magnetic heads having varying gap lengths

Details Method for fabricating magnetic heads having varying gap lengths Method for fabricating magnetic heads having varying gap lengths

1997-11-20

1999-01-05

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

360121, G11B 542

Patent

active

058550569

ABSTRACT:
An improved method for forming a magnetic head which efficiently allows multiple head elements of varying gap length to be located on a common wafer. A multiple gap magnetic head is formed by depositing a first magnetic layer on a wafer such that the first layer extends across all the head element segments Two separate insulating layers are individually deposited over the first layer, with a thin etch stop barrier layer being deposited between the insulation layers over heads which are to have a narrower gap length. The top insulation layer covering the etch stop barrier layer is then removed, and a second magnetic layer deposited over all the head element segments on the wafer. In addition to simplifying the fabrication process, the etch stop layer allows tight processing control to be maintained when creating the different gap lengths.

REFERENCES:
patent: 3668669 (1972-06-01), Marino et al.
patent: 4742412 (1988-05-01), Kuriyama
patent: 5041936 (1991-08-01), Hayakawa

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