Conference paper

Properties of thick-film resistors on dielectric and metal substrates for piezoresistive sensors

In this paper, the resistive and piezoresistive properties of a commercial resistive composition (Du Pont 2041), often used for strain-gauge applications, are examined on several dielectric compositions, which themselves are deposited onto various ceramic and metal substrates. The choice of suitable dielectrics allows to achieve good adhesion and coverage of the metal substrate, while retaining similar properties of the resistors as on alumina. The combinations of dielectrics and substrates also allows to separately determine the contributions on the resistor properties of the thermal expansion of the substrate and those of chemical interactions between resistor and dielectric.

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