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12 April 2000 Phased array probe using Pb(Zn1/3Nb2/3)O3-PbTiO3 single-crystal-polymer composites
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Abstract
A 96-channel phased array probe using Pb(Zn1/3Nb2/3)O3-PbTiO3 (PZNT 91/9) single-crystal-polymer composites has been successfully fabricated to realize broader bandwidth property. Wafers of PZNT 91/9 single crystals larger than 15 X 20 mm were prepared by a Bridgman method. 1 - 3 composites were fabricated using an improved dice-fill technique. Fabricated 1 - 3 composites with 67% volume fraction of single crystal showed electromechanical coupling factors (k33') of over 80% acoustic impedances of 10 to 12 Mrayls, and dielectric constants of 1,800 to 2,100. A phased array probe with a center frequency of 3.5 MHz was fabricated using the 1 - 3 composites. A flexible printed circuit was connected to the composite and all elements were successfully cut using an improved fabrication process. The bandwidth of the PZNT 91/9 single-crystal composite probes is twice as broad as that of conventional PZT ceramic probe. Echo amplitudes of these PZNT 91/9 single-crystal composite probes are almost the same as those of conventional PZT ceramic probes.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kazuhiro Itsumi, Shiroh Saitoh, Mamoru Izumi, Tsuyoshi Kobayashi, Kouichi Harada, and Yohachi Yamashita "Phased array probe using Pb(Zn1/3Nb2/3)O3-PbTiO3 single-crystal-polymer composites", Proc. SPIE 3982, Medical Imaging 2000: Ultrasonic Imaging and Signal Processing, (12 April 2000); https://doi.org/10.1117/12.382228
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