Cornez, D., Lapp, S., Cochran, S. and Kirk, K.J. (2007) Acoustical Parameters Characterisation of Aluminium Nitride Thin Film BAW Resonators Using Resonant Spectrum Approach. In: 2007 IEEE International Ultrasonics Symposium (IUS), New York, NY, USA, 28-31 Oct 2007, pp. 1437-1440. ISBN 9781424413836 (doi: 10.1109/ULTSYM.2007.361)
Full text not currently available from Enlighten.
Abstract
The determination of piezoelectric properties of an aluminium nitride thin film sandwiched between two electrodes, and acoustically coupled to a supporting substrate, is considered. Measuring the properties of such a BAW composite resonator can be used for film characterisation. The resonant spectrum method has been implemented, which consists of analysing the variation in spacing of parallel resonant frequencies for the resonator. The film parameters were derived from experimental measurements of the insertion loss (s11) of aluminium nitride deposited on glass and LiNO3 respectively, with top and bottom electrodes. A one-dimensional model was used to simulate the functional behaviour of the two examples of four-layer aluminium nitride based resonators. The modelling technique for multilayer ultrasonic transducers was based on the solutions to the 1-D wave equation. It was possible to obtain good agreement between the experimental and modelled results. The values of velocity and density agreed within 0.5%. The spacing of parallel resonant frequencies could also be closely matched between the experiment and the simulation. Under these conditions, the value of kt 2 of the piezoelectric film was inferred from the model.
| Item Type: | Conference Proceedings |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Cochran, Professor Sandy |
| Authors: | Cornez, D., Lapp, S., Cochran, S., and Kirk, K.J. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| ISSN: | 1051-0117 |
| ISBN: | 9781424413836 |
| Published Online: | 26 December 2007 |
University Staff: Request a correction | Enlighten Editors: Update this record
Deposit and Record Details
Deposit and Record Details