High accuracy track width thin-film magnetic head

Details High accuracy track width thin-film magnetic head High accuracy track width thin-film magnetic head

1992-03-30

1994-01-04

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

360119, G11B 531, G11B 523

Patent

active

052765792

ABSTRACT:
A thin-film magnetic head includes a non-magnetic insulating substrate, a lower magnetic substance layer which is stacked on the insulating substrate, a gap layer which is further stacked on a predetermined area of the lower magnetic substance layer, an insulating layer which is stacked on a predetermined area of the gap layer and has a plurality of coil layers, an upper magnetic substance layer which is stacked in the manner of covering entirely the lower magnetic substance layer, the gap layer and the insulating substance layer, and a protective layer which is stacked on the upper magnetic substance layer. The thin-film magnetic head comprises a magnetic substance disposed in first and second grooves, respectively, which are formed in the substrate. The first groove is at a right angle to a portion which is to define a tape contacting surface and has the same width as a track width of a tape. The second groove is at a right angle to the first groove and parallel to the plurality of lines of coil layers.

REFERENCES:
patent: 4517616 (1985-05-01), Bischoff

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