Piezoresistive

Piezoresistive effect refers to the change in the electrical resistance of a material when subjected to mechanical stress. This phenomenon is utilized in various sensing applications, particularly in strain gauges, pressure sensors, and accelerometers. The effect is based on the alteration of the material's electronic band structure under strain, which can be either tensile or compressive. The piezoresistive coefficient, a material property, quantifies the sensitivity of the resistance change to the applied stress. The piezoresistive effect is observed in both metallic and semiconductor materials, with semiconductors generally exhibiting a larger piezoresistive coefficient. The effect is reversible, meaning the resistance returns to its original value when the stress is removed. The piezoresistive effect is widely used in industrial, automotive, and aerospace applications due to its high sensitivity, reliability, and ability to operate in harsh environments. However, it is important to note that the piezoresistive effect can be influenced by temperature changes, which may require compensation techniques in certain applications.