Patent ID: 6234027
Filing Date: 2001-05-22
Classification: G01L

Abstract:
A semiconductor pressure sensor for measuring an externally present pressure, comprising:a semiconductor substrate including a region, the region being configured as a membrane, the membrane being deformable by the externally present pressure, the semiconductor substrate having an internal mechanical interference stress by which the entire semiconductor substrate is deformed;at least one measurement resistor arranged on the membrane, the at least one measurement resistor having an electrical resistance, the electrical resistance of the at least one measurement resistor being modifiable as a result of a deformation of the at least one measurement resistor; andat least one compensation resistor arranged on the semiconductor substrate outside of the membrane, the at least one compensation resistor being coupled in series with the at least one measurement resistor, the at least one compensation resistor having an electrical resistance, the electrical resistance of the at least one compensation resistor being modifiable as a result of a deformation of the at least one compensation resistor, wherein a change in the electrical resistance of the at least one measurement resistor and a change in the electrical resistance of the at least one compensation resistor as a result of the internal mechanical interference stress are approximately identical in magnitude and different in sign.