Thin film magnetic heads with multiple yokes

Details Thin film magnetic heads with multiple yokes Thin film magnetic heads with multiple yokes

1994-07-25

1995-09-19

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Core

360123, G11B 5147, G11B 517

Patent

active

054521688

ABSTRACT:
A thin film magnetic head is fabricated with a multiplicity of magnetic yokes that interact effectively with an electrical coil. The magnetic P1 and P2 pole sections of the yoke are very narrow and form closely spaced envelopes about the coil. The multiple yokes are inductively linked to the coil so as to provide an increased number of flux interactions for a given length of coil turn. With this magnetic head design, signal output is increased, thermal noise is reduced, and the signal-to-noise ratio is effectively improved.

REFERENCES:
patent: 4223360 (1980-09-01), Sansom et al.
patent: 5155644 (1992-10-01), Kira et al.
patent: 5184267 (1993-02-01), Mallary
patent: 5195005 (1993-03-01), Mallary et al.
Shigeaki, Watanabe, "Thin Film Magnetic Head", Jan. 5, 1986, Abstract vol. 010260, Publication No. JP61085612.

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