Development of a 20-MHz wide-bandwidth PMN-PT single crystal phased-array ultrasound transducer

Chi Man Wong, Yan Chen, Haosu Luo, Jiyan Dai, Kwok Ho Lam, Helen Lai wa Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

High piezoelectric (d33 > 1000 pC/N) and electromechanical coupling (k33 > 0.8) properties of the single crystal with an optimized fabrication process involving the photolithography technique have been demonstrated to be suitable for wide-bandwidth (⩾70%) and high-sensitivity (insertion loss ⩽30 dB) phased-array transducer application. A −6 dB bandwidth of 91% and an insertion loss of 29 dB for the 20-MHz 64-element phased-array transducer were achieved. This result shows that the bandwidth is improved comparing with the investigated high-frequency (⩾20 MHz) ultrasound transducers using piezoelectric ceramic and single crystal materials. It shows that this phased-array transducer has potential to improve the resolution of biomedical imaging, theoretically. Based on the hypothesis of resolution improvement, this phased-array transducer is capable for small animal (i.e. mouse and zebrafish) studies.
Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalUltrasonics
Volume73
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • High-frequency phased-array
  • PMN-PT single crystal
  • Ultrasound transducer

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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