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PIRAMID Résumé de rapport

Project ID: G5RD-CT-2001-00456
Financé au titre de: FP5-GROWTH
Pays: France

High frequency transducers

High frequency single-element transducers based on materials developed in the project are under development. The first fabrication uses PZT thick film processed by screen printing and firing on porous PZT substrate. The unpoled substrate fulfils both technological requirements for the screen-printing process as well as acoustical requirements allowing it to be used directly as a backing in a transducer.

Moreover, the porosity allows to increase the attenuation in the substrate and thus to reduce its size. The centre frequency is around 20 MHZ and addition of a lens is planned. This allows to an integrated transducer with minimal number of fabrication steps.

The second fabrication is made with a PMN-PT curved disk where the focusing is obtained by the geometry. The centre frequency is around 40 MHz.


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