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Title: CMOS-compatible ruggedized high-temperature Lamb wave pressure sensor
Authors: Kropelnicki, P.
Muckensturm, K.-M.
Mu, X. J.
Randles, A. B.
Cai, H.
Tsai, J. M.
Vogt, H.
Ang, Wan Chia
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2013
Source: Kropelnicki, P., Muckensturm, K. M., Mu, X. J., Randles, A. B., Cai, H., Ang, W. C., & et al. (2013). CMOS-compatible ruggedized high-temperature Lamb wave pressure sensor. Journal of micromechanics and microengineering, 23(8), 085018-.
Series/Report no.: Journal of micromechanics and microengineering
Abstract: This paper describes the development of a novel ruggedized high-temperature pressure sensor operating in lateral field exited (LFE) Lamb wave mode. The comb-like structure electrodes on top of aluminum nitride (AlN) were used to generate the wave. A membrane was fabricated on SOI wafer with a 10 µm thick device layer. The sensor chip was mounted on a pressure test package and pressure was applied to the backside of the membrane, with a range of 20–100 psi. The temperature coefficient of frequency (TCF) was experimentally measured in the temperature range of −50 °C to 300 °C. By using the modified Butterworth–van Dyke model, coupling coefficients and quality factor were extracted. Temperature-dependent Young's modulus of composite structure was determined using resonance frequency and sensor interdigital transducer (IDT) wavelength which is mainly dominated by an AlN layer. Absolute sensor phase noise was measured at resonance to estimate the sensor pressure and temperature sensitivity. This paper demonstrates an AlN-based pressure sensor which can operate in harsh environment such as oil and gas exploration, automobile and aeronautic applications.
DOI: 10.1088/0960-1317/23/8/085018
Schools: Lee Kong Chian School of Medicine (LKCMedicine) 
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:LKCMedicine Journal Articles

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