Three-dimensional micro electromechanical system piezoelectric ultrasound transducer
Abstract
Here we present the design and experimental acoustic test data for an ultrasound transducer technology based on a combination of micromachined dome-shaped piezoelectric resonators arranged in a flexible architecture. Our high performance niobium-doped lead zirconate titanate film is implemented in three-dimensional dome-shaped structures, which form the basic resonating cells. Adjustable frequency response is realized by mixing these basic cells and modifying their dimensions by lithography. Improved characteristics such as high sensitivity, adjustable wide-bandwidth frequency response, low transmit voltage compatible with ordinary integrated circuitry, low electrical impedance well matched to coaxial cabling, and intrinsic acoustic impedance match to water are demonstrated.
- Publication:
-
Applied Physics Letters
- Pub Date:
- December 2012
- DOI:
- Bibcode:
- 2012ApPhL.101y3101H
- Keywords:
-
- acoustic impedance;
- coaxial cables;
- crystal resonators;
- electric impedance;
- frequency response;
- lead compounds;
- lithography;
- micromachining;
- micromechanical devices;
- niobium;
- piezoelectric transducers;
- ultrasonic transducers;
- 43.38.Fx;
- 85.50.-n;
- 85.85.+j;
- Piezoelectric and ferroelectric transducers;
- Dielectric ferroelectric and piezoelectric devices;
- Micro- and nano-electromechanical systems and devices