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PIEZOELECTRIC TRANSDUCER

  • US 20100094105A1
  • Filed: 10/13/2009
  • Published: 04/15/2010
  • Est. Priority Date: 12/30/1997
  • Status: Active Grant
First Claim
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1. A transducer element, comprising:

  • a cell member including at least one cavity;

    a piezoelectric layer coupled to a periphery of the cell member so as to isolate the cavity from an external fluid medium, the piezoelectric layer having a concave shape and including an external surface and an internal surface, wherein a central portion of the piezoelectric layer is freely suspended over the cavity; and

    a first electrode attached to the external surface of the piezoelectric layer and a second electrode attached to the internal surface of the piezoelectric layer, the first and second electrodes coupled to an electrical circuit.

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