Design of a 50 MHz annular array using fine-grain lead titanate

Author

Snook, Kevin ; Shrout, Thomas ; Shung, K. Kirk

Author_Institution

Resource Center for Med. Ultrasound Transducer Technol., Pennsylvania State Univ., University Park, PA, USA

fYear

2002

fDate

28 May-1 June 2002

Firstpage

351

Lastpage

354

Abstract

An annular array with equal area elements has been fabricated and tested. The elements are made from a novel fine-grain lead titanate which was micromachined using a laser to form the kerfs. Resonance methods showed the lead titanate exhibited electromechanical properties similar to bulk materials, including a thickness coupling k_t of 0.49 and low permittivity (ε₃₃^S/ε₀=178). An average center frequency of 53 MHz with 40% bandwidth was obtained across all the elements. Crosstalk levels were below -20 dB in water. Good agreement was obtained between the measured results and a finite element model.

Keywords

biomedical transducers; crosstalk; finite element analysis; lead compounds; micromachining; piezoceramics; piezoelectric transducers; ultrasonic transducer arrays; (Pb_0.85Sm_0.1)(Ti_0.98Mn_0.02)O₃; 50 MHz; 50 MHz annular array design; 53 MHz; PbTiO₃; annular array; average center frequency; bandwidth; bulk materials; crosstalk levels; dermatology; electromechanical properties; equal area elements; fine-grain lead titanate; finite element model; high frequency ultrasound systems; kerfs; laser micromachining; low permittivity; ophthalmology; piezoceramics; resonance methods; thickness coupling; water; Dielectric materials; Finite element methods; Frequency; Impedance; Passband; Permittivity; Resonance; Titanium compounds; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on

ISSN

1099-4734

Print_ISBN

0-7803-7414-2

Type

conf

DOI

10.1109/ISAF.2002.1195941

Filename

1195941