Thin-film magnetic head having substrate formed of crystallized

Details Thin-film magnetic head having substrate formed of crystallized Thin-film magnetic head having substrate formed of crystallized

1990-03-27

1991-10-15

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Core

428900, G11B 5147, B32B 1706

Patent

active

050579592

ABSTRACT:
A thin-film magnetic head having a magnetic core formed by a thin-film deposition technique on a substrate formed of crystallized glass which comprises of a mass of microcrystalline aggregation particles having an average particle size of 1 to 10 .mu.m and each comprising of an aggregation of microcrystalline grains having an average grain size of about 0.5 .mu.m or smaller. This structure enables an improvement in the abrasion resistance of the head and, hence, an improvement in the recording/reproduction characteristics while maintaining the desired workability of the substrate, thereby improving the head in producibility and reliability.

REFERENCES:
patent: 4422117 (1983-12-01), Nomura et al.
patent: 4894742 (1990-01-01), Saito et al.

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