Electrical resistors – Resistance value responsive to a condition – Magnetic field or compass
Patent
1992-03-09
1993-03-23
Lateef, Marvin M.
Electrical resistors
Resistance value responsive to a condition
Magnetic field or compass
32420721, 357 27, H01L 3200
Patent
active
051968215
ABSTRACT:
A magnetic field sensor, such as a magnetoresistor, includes a strip of a layer of a high electron mobility semiconductor whose electrical characteristics vary when a magnetic field is applied thereto on the surface of a body (substrate) of an insulating layer. Conductive contacts are on the strip at the ends thereof and conductive shorting bars are on and spaced along the strip to divide the strip into active regions. The body is mounted on a permanent magnet assembly which includes a magnet and a layer of a ferromagnetic material with the ferromagnetic material extending over the strip. The ferromagnetic layer is in close proximity to only the strip and, more preferably, to only the active regions of the strip so as to confine the magnetic field to the strip.
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Fuller Brian K.
Gay Jackson G.
Lequesne Bruno P. B.
Partin Dale L.
Pinkerton Frederick E.
General Motors Corporation
Lateef Marvin M.
Wallace Robert J.
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