Proposal for an Easier Obtention of Piezoresistance Coefficients

An alternative procedure to obtain the piezoresistance coefficients is proposed and implemented. It consists on the integration of the piezoresistance equation that relates the resistance change with the pressure change, via the piezoresistance coefficients. This yields a linear dependence between the logarithm of the measured resistance (R) and pressure (P). When implemented experimentally, this facilitates to make one single measurement of R vs P. The linear fit of the logarithm plot yields the piezoresistance coefficients. This technique is compared with the usual procedure, yielding smaller errors, while saving time and experimental and calculation effort, as only one measurement is necessary, as compared with the former procedure.