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Performance of multi-layer PZT transducer arrays

Publication ,  Journal Article
Smith, SW; Goldberg, RL
Published in: Proceedings of the Ultrasonics International Conference
January 1, 1993

Two-dimensional arrays are critical to the future of medical ultrasound for focusing and phase correction in the elevation dimension and for 3-D scanning. Poor sensitivity is a serious problem with such 2-D arrays because their small element size results in a small clamped capacitance and a high electrical impedance near resonance. Sensitivity can be improved by reducing the array element impedance using an N layer structure of PZT connected electrically in parallel and acoustically in series. The clamped capacitance is multiplied by a factor of N2 and the impedance by 1/N2 compared to a single layer transducer. A 3 layer, 3×43 array was fabricated using thick film hybrid technology. Each element had dimensions of 0.37×3.5×0.71 mm. With a light epoxy backing, the element impedance was 100 Ω at series resonance and the minimum round-trip insertion loss was 24 dB. This was compared to a single layer control array with an impedance of 550 Ω per element and an insertion loss of 34 dB per element. Images were made on the Duke ultrasound scanner which showed greater sensitivity for the multi-layer ceramic.

Duke Scholars

Published In

Proceedings of the Ultrasonics International Conference

DOI

Publication Date

January 1, 1993

Start / End Page

117 / 120
 

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Smith, S. W., & Goldberg, R. L. (1993). Performance of multi-layer PZT transducer arrays. Proceedings of the Ultrasonics International Conference, 117–120. https://doi.org/10.1016/b978-0-7506-1877-9.50031-7
Smith, S. W., and R. L. Goldberg. “Performance of multi-layer PZT transducer arrays.” Proceedings of the Ultrasonics International Conference, January 1, 1993, 117–20. https://doi.org/10.1016/b978-0-7506-1877-9.50031-7.
Smith SW, Goldberg RL. Performance of multi-layer PZT transducer arrays. Proceedings of the Ultrasonics International Conference. 1993 Jan 1;117–20.
Smith, S. W., and R. L. Goldberg. “Performance of multi-layer PZT transducer arrays.” Proceedings of the Ultrasonics International Conference, Jan. 1993, pp. 117–20. Scopus, doi:10.1016/b978-0-7506-1877-9.50031-7.
Smith SW, Goldberg RL. Performance of multi-layer PZT transducer arrays. Proceedings of the Ultrasonics International Conference. 1993 Jan 1;117–120.

Published In

Proceedings of the Ultrasonics International Conference

DOI

Publication Date

January 1, 1993

Start / End Page

117 / 120