Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28235
Title: Broadband focusing ultrasonic transducers based on dimpled LiNbO3 plate with inversion layer
Authors: Chen, J
Dai, JY 
Zhang, C
Zhang, Z
Feng, G
Issue Date: 2012
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 2012, v. 59, no. 12, p. 2797-2802 How to cite?
Journal: IEEE transactions on ultrasonics, ferroelectrics, and frequency control 
Abstract: A high-frequency broadband focusing transducer based on dimpled LiNbO3 inversion layer plate has been fabricated and characterized. A spherical surface with a curvature radius of 6 mm is formed on the half-thickness LiNbO3 inversion layer plate of Y36 degrees cut orientation. The domain structure in the cross section is observed after a hydrofluoric acid etching process. For transducer fabrication, conductive epoxy is used as the backing material and polymer is deposited on the front face as the matching layer. The center frequency, bandwidth, and insertion loss of the focused transducer are measured to be 72 MHz, 136%, and -32 dB, respectively. The focused transducer has been successfully used for rabbit eyeball imaging and a better imaging capability compared with the planar transducer has been demonstrated. These promising results prove that the dimpled LiNbO3 inversion layer plate has great potential for fabrication of high-frequency broadband focusing ultrasonic transducers.
URI: http://hdl.handle.net/10397/28235
ISSN: 0885-3010
EISSN: 1525-8955
DOI: 10.1109/TUFFC.2012.2521
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