Multilayer piezoelectric resonators for medical ultrasound transducers

Author

Greenstein, M. ; Kumar, Udaya

Author_Institution

Hewlett-Packard Labs., Palo Alto, CA, USA

Volume

43

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

620

Lastpage

622

Abstract

Multilayer piezoelectric resonators were fabricated and the dependence of the electrical impedance and the coupling coefficient were measured as a function of the number of layers, for N=1, /spl middot//spl middot//spl middot/, 20 layers. The magnitude of the electrical impedance followed the theoretical predicted 1/N/sup 2/ relation, and the coupling coefficient, K/sub t/, remained relatively constant out to N=15 layers. These cofired resonators are suitable for medical ultrasound transducers.

Keywords

biomedical equipment; biomedical ultrasonics; crystal resonators; electric impedance; piezoelectric transducers; ultrasonic transducers; cofired resonators; coupling coefficient; electrical impedance; layers number; medical diagnostic imaging; medical instrumentation; medical ultrasound transducers; multilayer piezoelectric resonators; Acoustic transducers; Biomedical imaging; Biomedical transducers; Impedance; Nonhomogeneous media; Piezoelectric transducers; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement; Voltage;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.503721

Filename

503721