Dynamic magnetic information storage or retrieval – Head – Coil
Patent
1981-03-23
1984-07-03
Kilgore, Robert Martin
Dynamic magnetic information storage or retrieval
Head
Coil
360113, 360121, 360122, G11B 520, G11B 512, G11B 522, G11B 527
Patent
active
044582790
ABSTRACT:
Optically or visually perceptible lapping and grinding patterns are provided in a thin film transducer structure by depositing conductive material both between the magnetic pole pieces and, external to such pole pieces. The conductive material between the pole pieces is so positioned as to determine the zero throat point of the transducer and is in predetermined aligned relationship with the external pattern by, for example, being formed during a single masking step.
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patent: 3846841 (1974-11-01), Lazzari et al.
patent: 3908194 (1975-09-01), Romankiw
patent: 4092688 (1978-05-01), Nomura et al.
patent: 4143458 (1979-03-01), Gibson
patent: 4190872 (1980-02-01), Jones, Jr. et al.
patent: 4195323 (1980-03-01), Lee
patent: 4241367 (1980-12-01), Nomura
"Finite Element Analysis of the Vertical Multi-Turn Thin-Film Head", IEEE Transactions on Magnetics, vol. 14, No. 5, Sep. 1978, pp. 506-508, by Eric R. Katz.
IBM Technical Disclosure Bulletin, vol. 13, No. 3, Aug. 1970, pp. 787-788, "Measuring Throat Gap Height of a Magnetic Head", by G. B. Flippen.
Kilgore Robert Martin
Magnex Corporation
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