Self-focused ZnO transducers for ultrasonic biomicroscopy

J. M. Cannata, J. A. Williams, Q. Zhou, H. Yu, Lei Sun, E. S. Kim, K. K. Shung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)


A simple fabrication technique was developed to produce self-focused high frequency single element transducers with sputtered Zinc Oxide (ZnO) crystal films. The novelty of this technique lies in that the ZnO film can be sputtered directly onto a curved substrate. Two transducers were fabricated by sputtering an 18 μm thick ZnO layer on 2 and 3 mm diameter aluminum rods with ends shaped and polished to produce an f# equal to one. The aluminum rod served a dual purpose as the backing layer and positive electrode for the resultant transducers. A single 4 μm Parylene polymer matching layer was deposited on the transducers after housing and interconnect. The pulse-echo response for the 2 mm aperture transducer was centered at 109 MHz with a -6dB bandwidth of 43%. A 3 mm aperture transducer produced a 96 MHz echo response with a 52% bandwidth. The measured insertion loss for the 2 mm aperture was 45 dB and the 3 mm aperture was 42 dB. A wire phantom and adult zebrafish were imaged to show the capability of the transducers.
Original languageEnglish
Title of host publication2007 IEEE Ultrasonics Symposium Proceedings, IUS
Number of pages4
Publication statusPublished - 1 Dec 2007
Externally publishedYes
Event2007 IEEE Ultrasonics Symposium, IUS - New York, NY, United States
Duration: 28 Oct 200731 Oct 2007


Conference2007 IEEE Ultrasonics Symposium, IUS
Country/TerritoryUnited States
CityNew York, NY

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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