Impedance matching transducers

B - Operations – Transporting – 06 – B

Patent

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Details

B06B 1/06 (2006.01) G10K 11/02 (2006.01)

Patent

CA 2379177

The present invention provides exemplary transducer elements, transducer packages and methods of making same. One exemplary transducer element (10) has first and second transducer surfaces (14, 20) and a plurality of tapered pillars (16) that comprise piezoelectric material and extend between the first and second transducer surfaces. At least one of the pillars (16) has a first cross-sectional area at the first tranducer surface (14) that is larger than a second cross-sectional area at the second transducer surface (20). Hence, the transducer has a lower acoustic impedance at the second surface than at the first surface.

La présente invention concerne des éléments de transducteur représentatifs, des boîtiers de transducteur et des procédés de fabrication correspondants. Un élément (10) de transducteur représentatif présente des première et seconde surfaces (14, 20) de transducteur et plusieurs colonnes effilées (16) qui contiennent une matière piézoélectrique et s'étendent entre lesdites première et seconde surfaces. Au moins une des colonnes (16) a une première section transversale au niveau de la première surface de transducteur (14) qui est plus large qu'une seconde section transversale au niveau de la seconde surface de transducteur (20). De ce fait, le transducteur présente une impédance acoustique plus faible au niveau de la seconde surface qu'au niveau de la première.

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