Static information storage and retrieval – Information masking – Thermoplastic
Patent
1987-01-29
1988-08-16
Wolff, John H.
Static information storage and retrieval
Information masking
Thermoplastic
360122, G11B 5147
Patent
active
047648341
ABSTRACT:
A thin film transducer having a substrate, a first and second pole piece formed of a selected magnetic material and terminating in a gap, a coil positioned between the first and second pole pieces and a magnetically conductive layer formed of a material having selected chemical, magnetic and physical properties and having a known magnetic saturation flux density and being positioned contiguous at least one of the first pole piece and second pole piece and rearward of the edges forming the gap to conduct magnetic flux in parallel to the pole pieces and to increase and concentrate the magnetic flux density at the edges of the first and second pole piece defining the gap is shown.
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patent: 4092688 (1978-05-01), Nomura et al.
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patent: 4190872 (1980-02-01), Jones, Jr. et al.
patent: 4219854 (1980-08-01), Church et al.
patent: 4241367 (1980-12-01), Nomura et al.
patent: 4295173 (1981-10-01), Romankiw et al.
L. T. Romankiw et al., "Design of Seperately Optimized Thin Film Read/Write Magnetic Recording Heads", IBM TDB, vol. 23, No. 5, Oct. 1980, pp. 2148-2149.
Frank Paul D.
Rice Allan F.
Roberts Gary E.
Roscamp Thomas A.
Applied Magnetics Corporation
Meaney, Jr. Daniel J.
Severin David J.
Wolff John H.
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