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.

Published in:
XXVII International Conference of IMAPS Poland Chapter, 219-222
Presented at:
XXVII International Conference of IMAPS Poland Chapter, Podlesice (PL)
Etude de résistances sur métal, zircone, alumine avec ou sans diélectrique. L’utilisation du même diélectrique sur différents substrats permet de séparer l’effet chimique de l’effet thermomécanique. On montre qu’on arrive à trouver des diélectriques ayant peu d’effet chimique sur DP2041, et que, dans ce cas, la variation de TCR sur acier ou zircone est essentiellement thermomécanique (dilatation & effet de jauge). En revanche, la zircone et d’autres diélectriques altèrent fortement DP2041, et modifient son TCR.

 Record created 2006-06-22, last modified 2018-01-27

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