Miniature transformer for read/write transducer

Details Miniature transformer for read/write transducer Miniature transformer for read/write transducer

1992-05-05

1998-11-03

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Coil

G11B 517

Patent

active

058318003

ABSTRACT:
A thin film transformer with improved magnetic properties has a bottom pole member supported over a substrate, a top pole member and an intermediate multi-turn thin film coil. The top and bottom pole members form a closed magnetic path, and the coil surrounds one of the legs of the magnetic path. The top pole member, the bottom pole member or both are formed as a plurality of individual laterally spaced pole elements each forming a closed magnetic path with the other pole member. The lateral spacing of the pole elements substantially reduces eddy current build-up in the magnetic path.
The bottom pole member in the region of the leg encircled by the coil has a plurality of spaced support members and the top pole element is formed over the support members to provide additional magnetic material at the join site.

REFERENCES:
patent: 4743988 (1988-05-01), Sato et al.
patent: 4745506 (1988-05-01), Nakamura et al.
patent: 4787003 (1988-11-01), Nakamura et al.
patent: 4927804 (1990-05-01), Zieren et al.
patent: 5072324 (1991-12-01), Lin et al.
patent: 5173826 (1992-12-01), Bischoff

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