pp. 2073-2082
S&M2594 Research Paper https://doi.org/10.18494/SAM.2021.3256 Published: June 16, 2021 Fabrication and Characterization of High-frequency Vibration Sensor over 6 kHz with Potential for Energy Harvesting [PDF] Lan Zhang, Ryohei Takei, Jian Lu, Daiji Noda, Ryo Ohta, Takeshi Kobayashi, and Toshihiro Itoh (Received March 22, 2021; Accepted May 11, 2021) Keywords: vibration, MEMS, piezoelectric, high frequency, microsensors
We report on the fabrication and characterization of a high-frequency and high-voltage-output microelectromechanical systems (MEMS) vibration sensor with potential for energy harvesting. A novel structure was developed to ensure that the vibration sensor could output a high voltage in the high-frequency vibration domain. Specifically, the device was composed of eight aluminum nitride C-shaped spring flexures, which surrounded and supported a disk proof mass. The vibration sensor was fabricated, and its functional characteristics were comprehensively evaluated at a commercial foundry with an 8-inch MEMS process line. In experiments, the sensor exhibited an extremely high center resonance frequency of up to 6.7 kHz. Moreover, an output voltage of up to 167.8 mV was realized under an acceleration of 1 g.
Corresponding author: Lan ZhangThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Lan Zhang, Ryohei Takei, Jian Lu, Daiji Noda, Ryo Ohta, Takeshi Kobayashi, and Toshihiro Itoh, Fabrication and Characterization of High-frequency Vibration Sensor over 6 kHz with Potential for Energy Harvesting, Sens. Mater., Vol. 33, No. 6, 2021, p. 2073-2082. |