Resonant Microsensors

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "A:Physics".

Deadline for manuscript submissions: closed (1 September 2020) | Viewed by 2885

Special Issue Editor


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Guest Editor
Institute for Microeletronics and Microsensors, Johannes Kepler University, 4040 Linz, Austria
Interests: resonant viscosity sensors; microacoustics; shear-wave spectroscopy; acoustic streaming phase transition monitoring

Special Issue Information

Dear Colleagues,

The measurement of minute changes in mass or properties of gases and liquids is best approached by making use of electromechanical resonances. The classical example is the piezoelectric quartz microbalance to weigh thin films. Applications in liquids range from condition monitoring for engine oils to highly specific biosensors. With the rise of MEMS technology, the principle of resonant sensors was realized in a wide variety of devices, such as microcantilevers or miniaturized tuning fork resonators. In addition to piezoelectricity, actuation and readout is realized using capacitive, electrodynamic, electro- and magnetostrictive, thermal, and optical transduction mechanisms. The interaction with a surrounding fluid often requires concise analysis of pressure and shear-wave acoustics. Nonlinear effects are regularly observed at higher vibration amplitudes due to deviations from Hooke’s law for spring structures or fluid streaming effects. While the field of applications continuously expands, modeling using analytical and numerical models becomes increasingly important.

The Special Issue on Resonant Microsensors addresses recent advances in the field focusing on fabrication, analysis, and application. A topical workshop will be organized in May 2020 at JKU Linz, Austria. You are welcome to preregister by email to [email protected] to stay informed about the upcoming activities. Participants are invited to submit a contribution to the MDPI Micromachines Special Issue on Resonant Microsensors by September 1st, 2020.

Dr. Erwin K. Reichel
Guest Editor

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Keywords

  • resonant sensors
  • microcantilever
  • QCM
  • acoustic fluid interaction
  • electromechanical transduction

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Published Papers (1 paper)

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Research

14 pages, 3340 KiB  
Article
A Resonant Pressure Microsensor with Temperature Compensation Method Based on Differential Outputs and a Temperature Sensor
by Chao Xiang, Yulan Lu, Pengcheng Yan, Jian Chen, Junbo Wang and Deyong Chen
Micromachines 2020, 11(11), 1022; https://doi.org/10.3390/mi11111022 - 21 Nov 2020
Cited by 9 | Viewed by 2586
Abstract
This paper presents the analysis and characterization of a resonant pressure microsensor, which employs a temperature compensation method based on differential outputs and a temperature sensor. Leveraging a silicon-on-insulator (SOI) wafer, this microsensor mainly consists of a pressure-sensitive diagram and two resonant beams [...] Read more.
This paper presents the analysis and characterization of a resonant pressure microsensor, which employs a temperature compensation method based on differential outputs and a temperature sensor. Leveraging a silicon-on-insulator (SOI) wafer, this microsensor mainly consists of a pressure-sensitive diagram and two resonant beams (electromagnetic driving and electromagnetic induction) to produce a differential output. The resonators were vacuum packaged with a silicon-on-glass (SOG) cap using anodic bonding and the wire interconnection was realized by sputtering an Au film on highly topographic surfaces using a hard mask. After the fabrication of the resonant pressure microsensor, systematic experiments demonstrated that the pressure sensitivity of the presented microsensor was about 0.33 kPa/Hz. Utilizing the differential frequency of the two resonators and the signal from a temperature sensor to replace the two-frequency signals by polynomial fitting, the temperature compensation method based on differential outputs aims to increase the surface fitting accuracy of these microsensors which have turnover points. Employing the proposed compensation approach in this study, the errors were less than 0.02% FS of the full pressure scale (a temperature range of −40 to 85 °C and a pressure range of 200 kPa to 2000 kPa). Full article
(This article belongs to the Special Issue Resonant Microsensors)
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