Thin film magnetic head

Details Thin film magnetic head Thin film magnetic head

1979-03-05

1980-12-23

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

360123, G11B 514, G11B 520

Patent

active

042413672

ABSTRACT:
This invention provides a thin film magnetic head composed of at least one conductive body layer formed in a magnetic material substrate with grooves therein, each groove being filled with a non-magnetic material, an insulating layer formed on the face of the magnetic material substrate including the conductive body layers, and a magnetic material layer formed on the insulating body layer. To precisely form the groove, an electrolytic etching process of the substrate and an annealing process of the substrate surface layer are combined to provide an straight-line property of the groove and the groove section, circular in arc, with better reproducibility.

REFERENCES:
patent: 4127884 (1978-11-01), Nouchi et al.

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