Abstract
This paper presents a monolithically fabricated microelectromechanical piezoelectric cantilever beam with a T-shaped cross section capable of in-plane and out-of-plane displacements and sensing. High-aspect-ratio T-beams are achieved by direct micromachining of bulk lead zirconate titanate (PZT-4) via reactive ion etching of 65-μm-deep features. Electrodes deposited on the top and bottom web and flange regions of the T-shaped structure allow in-plane and out-of-plane motion actuation and sensing. The T-beam structures were tested for in-plane and out-of-plane tip displacements, out-of-plane blocking force, and impedance response. These results are explained using analytical models that predict static deflection, blocking force, and resonance frequency. Nine prototype micromachined T-beams are fabricated that achieve up to 129 μm of out-of-plane displacement, 11.6 μm of in-plane displacement, and 700 μN of out-of-plane blocking force. [2012-0170]
Original language | English (US) |
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Article number | 6335439 |
Pages (from-to) | 163-169 |
Number of pages | 7 |
Journal | Journal of Microelectromechanical Systems |
Volume | 22 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2013 |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Electrical and Electronic Engineering