Thin-film magnetic head

Details Thin-film magnetic head Thin-film magnetic head

1990-03-19

1991-09-10

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

360120, G11B 531, G11B 523

Patent

active

050478869

ABSTRACT:
A thin-film magnetic head is constructed by a lower core, a first insulating layer, a gap layer, a plurality of coil conductor layers, a plurality of insulating layers and an upper layer. The coil conductor layers are respectively embedded in the insulating layers. Each of the coil conductor layers is spirally formed on the gap layer, and the coil conductor layers are sequentially piled up on the gap layer. The gap layer is formed on the first insulating layer which coats and insulates the lower core. Then, an edge portion is formed by sandwiching the first insulating layer and the gap layer between the lower and upper cores. The first insulating layer whose shape affects the writing/reading efficiency of the thin-film magnetic head is protected by the gap layer. Preferably, the gap layer is formed by coating Al.sub.2 O.sub.3 film or SiO.sub.2 on the first insulating layer.

REFERENCES:
patent: 4636897 (1987-01-01), Nakamura et al.
patent: 4652954 (1987-03-01), Church
patent: 4816946 (1989-03-01), Kira et al.
patent: 4819112 (1989-04-01), Iwata et al.
patent: 4841402 (1989-06-01), Imanaka et al.
patent: 4881144 (1989-11-01), Yuito et al.

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