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Sensors 2001, 1(6), 183-192;

A „Hybrid“ Thin-Film pH Sensor with Integrated Thick-Film Reference

University of Applied Sciences Aachen, Ginsterweg 1, 52428 Jülich, Germany
Institute of Thin Films and Interfaces, Research Centre Jülich GmbH, 52425 Jülich, Germany
New Mexico State University, Las Cruces, NM 88003-8001, USA
Author to whom correspondence should be addressed.
Received: 28 September 2001 / Accepted: 10 October 2001 / Published: 2 November 2001
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A reference electrode fabricated by means of thick-film technique is deposited onto a silicon substrate and combined with a thin-film pH sensor to a “hybrid” chip system. To evaluate the suitability of this combination, first investigations were carried out. The characteristics of the thin-film pH sensor were studied towards the thick-film Ag/AgCl reference electrode. Measurements were performed in the capacitance/voltage (C/V) and constant capacitance (Concap) mode for different pH values keeping the concentration of chloride ions constant. No difference of the sensor behaviour could be found when comparing the results to measurements, obtained versus a conventional macroscopic Ag/AgCl reference electrode. View Full-Text
Keywords: Hybrid sensor chip; Thick-film reference electrode; Thin-film pH sensor Hybrid sensor chip; Thick-film reference electrode; Thin-film pH sensor

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Simonis, A.; Krings, T.; Lüth, H.; Wang, J.; Schöning, M.J. A „Hybrid“ Thin-Film pH Sensor with Integrated Thick-Film Reference. Sensors 2001, 1, 183-192.

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