Twitter
Facebook
Mendeley
CiteULike
Open AccessThis article is
MDPI and ACS Style
- freely available
- re-usable
Sensors 2007, 7(10), 2389-2401; doi:10.3390/s7102389
Article
A MEMS-based Air Flow Sensor with a Free-standing Micro-cantilever Structure
Received: 27 August 2007 / Accepted: 10 October 2007 / Published: 17 October 2007
(This article belongs to the Special Issue Cantilever, Microcantilevers and Nanocantilever Sensors and Biosensors)
Abstract: This paper presents a micro-scale air flow sensor based on a free-standingcantilever structure. In the fabrication process, MEMS techniques are used to deposit asilicon nitride layer on a silicon wafer. A platinum layer is deposited on the silicon nitridelayer to form a piezoresistor, and the resulting structure is then etched to create afreestanding micro-cantilever. When an air flow passes over the surface of the cantileverbeam, the beam deflects in the downward direction, resulting in a small variation in theresistance of the piezoelectric layer. The air flow velocity is determined by measuring thechange in resistance using an external LCR meter. The experimental results indicate that theflow sensor has a high sensitivity (0.0284 ω/ms-1), a high velocity measurement limit (45ms-1) and a rapid response time (0.53 s).
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.
Export to BibTeX | EndNote
MDPI and ACS Style
Wang, Y.-H.; Lee, C.-Y.; Chiang, C.-M. A MEMS-based Air Flow Sensor with a Free-standing Micro-cantilever Structure. Sensors 2007, 7, 2389-2401.
AMA StyleWang Y-H, Lee C-Y, Chiang C-M. A MEMS-based Air Flow Sensor with a Free-standing Micro-cantilever Structure. Sensors. 2007; 7(10):2389-2401.
Chicago/Turabian StyleWang, Yu-Hsiang; Lee, Chia-Yen; Chiang, Che-Ming. 2007. "A MEMS-based Air Flow Sensor with a Free-standing Micro-cantilever Structure." Sensors 7, no. 10: 2389-2401.