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Title: Development of a 20-MHz wide-bandwidth PMN-PT single crystal phased-array ultrasound transducer
Authors: Wong, CM
Chen, Y
Luo, HS
Dai, JY 
Lam, KH 
Chan, HLW 
Keywords: PMN-PT single crystal
High-frequency phased-array
Ultrasound transducer
Issue Date: 2017
Publisher: Elsevier
Source: Ultrasonics, Jan. 2017, v. 73, p. 181-186 How to cite?
Journal: Ultrasonics 
Abstract: In this study, a 20-MHz 64-element phased-array ultrasound transducer with a one-wavelength pitch is developed using a PMN-30%PT single crystal and double-matching layer scheme. High piezoelectric (d(33) > 1000 pC/N) and electromechanical coupling (k(33) > 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.
ISSN: 0041-624X
EISSN: 1874-9968
DOI: 10.1016/j.ultras.2016.09.012
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