High frequency PMN-PT single crystal focusing transducer fabricated by a mechanical dimpling technique

Y. Chen, Kwok Ho Lam, D. Zhou, W. F. Cheng, Jiyan Dai, H. S. Luo, H. L.W. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

High frequency (∼30 MHz and ∼80 MHz) focusing ultrasound transducers were fabricated using a PMN-0.28PT single crystal by a mechanical dimpling technique. The dimpled single crystal was used as an active element for the focusing transducer. Compared with a plane transducer, the focusing transducer fabricated with a dimpled active element exhibits much broader bandwidth and higher sensitivity. Besides, a high quality image can be obtained by the 30 MHz focusing transducer, in which the -6 dB axial and lateral resolution is 27 μm and 139 μm, respectively. These results prove that the dimpling technique is capable to fabricate the high frequency focusing transducers with excellent performance for imaging applications.
Original languageEnglish
Pages (from-to)345-349
Number of pages5
JournalUltrasonics
Volume53
Issue number2
DOIs
Publication statusPublished - 1 Feb 2013

Keywords

  • Focusing ultrasound transducer
  • High frequency
  • PMN-PT single crystal

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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