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ElectroComponent Science and Technology
Volume 6 (1980), Issue 3-4, Pages 247-251
http://dx.doi.org/10.1155/APEC.6.247

Influence of the Substrate on the Electrical Properties of Thick-Film Resistors

1F. I. Magneti Marelli, Systems and Electronics Division, Pavia 27100, Italy
2Istituto di Fisca dell'Università, Laboratorio di Elettronica, Modena 41100, Italy

Received 20 July 1979

Copyright © 1980 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effect of substrate type on the electrical properties of thick film resistors is determined. Five different substrates are used. The following properties are investigated: – thermal expansion, resistor profiles, resistance, TCR and resistor gauge factor. The resistors are physically inspected using X-ray diffractometry and electron probe analysis. This paper shows that conduction mechanism models for thick-film resistors generally need not take into account chemical and structural interactions with the substrate. However the effect of substrate on TCR values is significant for resistors exhibiting a large piezoresistive effect.