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Proceedings 2017, 1(4), 618; doi:10.3390/proceedings1040618

Temperature Dependence of Gauge Factor of Printed Piezoresistive Layers Embedded in Organic Coatings

1
Institute for Microelectronics and Microsensors, Johannes Kepler University, Linz, Austria
2
Department of Microelectronics, Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
3
R&D Organic Coatings, Voestalpine Stahl GmbH Linz, Austria
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 9 August 2017
Download PDF [1650 KB, uploaded 5 September 2017]

Abstract

The paper reports on temperature behavior of strain sensitivity of recently introduced screen printing technology facilitating the realization of silver and carbon black piezoresistors embedded in organic coatings. Piezoresistive layers were prepared by screen printing directly on the top of the organic coating. Since no glue or carrying substrates are between the sensitive element and the device under test, the coupling factor is high and the strain is efficiently transferred to the sensing element. The strain induced changes in resistance (piezoresistive effect) are generally lower compared to the changes induced by temperature. The temperature dependence of the sensitivity to strain was investigated utilizing both single element piezoresistors and piezoresistors connected to a Wheatstone bridge. The study analyzes strain-gauges under longitudinal tensile and compressive strain and temperatures up to 80 °C. Screen printed strain gauges can provide reliable and robust strain measurements for coated metallic substrates, the sensor performance is comparable to the conventional solution with glued sensors.
Keywords: gauge factor; temperature coefficient; embedded sensors; screen printing; organic coatings gauge factor; temperature coefficient; embedded sensors; screen printing; organic coatings
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. (CC BY 4.0).

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MDPI and ACS Style

Kulha, P.; Enser, H.; Sell, J.K.; Strauß, B.; Schatzl-Linder, M.; Jakoby, B.; Hilber, W. Temperature Dependence of Gauge Factor of Printed Piezoresistive Layers Embedded in Organic Coatings. Proceedings 2017, 1, 618.

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