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Primary Examiner: Wojciechowicz, Edward J.
Assistant Examiner:
Attorney: Duffield; Edward H.

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Title: High carrier velocity magnetic sensor

Abstract: A semi-conductive magnetic flux sensor is disclosed in which semi-conductive material having a resistance on the order of at least 500 ohms per square is placed in a lateral electric field of at least 500 volts per centimeter. A signal probe or contact located between the two lateral field contacts produces an output voltage when the sensor is subjected to magnetic fields having at least some component perpendicular to the plane of the three contacts. The device is highly sensitive and yields approximately one order of magnitude higher signal output than conventional Hall type semi-conductive magnetic sensors.

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Inventors: Vinal, Albert Watson (Cary, NC, US)

Application Number: 577254
Filing Date: 1975-05-14
Publication_date: 1976-12-14
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Class(es): 257/426 257/607, 257/E27.005, 257/E43.003
Other Classes:
US Patent Ref:
Other Refs: Other References: physical Review - vol. 157 No. 3, 5-15-67 -
IBM Tech. Bul. - vol. 12, No. 1, 6-1969 - Gardner et al.