Method for making a thin film magnetic head

Details Method for making a thin film magnetic head Method for making a thin film magnetic head

1985-10-24

1987-03-24

Powell, William A.

Dynamic magnetic information storage or retrieval

Head

Core

29603, 156652, 156656, 1566591, 156667, 2041923, 20419235, 427130, 427131, 360123, G11B 5235, G11B 517, C23F 102, B44C 122

Patent

active

046529543

ABSTRACT:
A method for making a thin film magnetic head assembly comprising the steps of depositing a first magnetic pole piece layer, depositing a nonmagnetic material gap forming layer, and depositing a protective layer of etch resistant material. A layer of insulation is deposited upon which is formed a conductive coil. A leveling pad of insulation is deposited over the conductive coil, and the part of the protective layer which is not covered by the insulation is removed. The gap forming layer is therefore protected during the processing steps so that a desired gap length is produced. The second magnetic pole piece layer is then deposited to complete the magnetic circuit.

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patent: 3795954 (1974-03-01), Alex et al.
patent: 4172318 (1979-10-01), Huntt
patent: 4239587 (1980-12-01), Koel et al.
patent: 4436593 (1984-03-01), Osborne et al.
patent: 4481071 (1984-11-01), Anderson et al.
patent: 4550353 (1985-10-01), Hirai et al.
patent: 4592801 (1986-06-01), Hara et al.
IBM Technical Disclosure Bulletin, vol. 27, No. 6, Nov. 1984, pp. 3486-3487, entitled "Fabrication of Thin Film Head" by Mark A. Church.

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