A Low-Impedance Ultrasonic Probe Using a Multilayer Piezoelectric Ceramic

An ultrasonic probe employing a multilayer ceramic is proposed for improving the S/N ratio. The S/N ratio is degraded when the probe impedance rises in relation to parallel combined impedances of cable and receiver circuits. The impedance of n layers of ceramic can be reduced to 1/ n 2 of a single c...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 28; no. S1; p. 54
Main Authors Saitoh, Shiroh, Izumi, Mamoru, Abe, Kazuhide
Format Journal Article
LanguageEnglish
Published 01.01.1989
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Summary:An ultrasonic probe employing a multilayer ceramic is proposed for improving the S/N ratio. The S/N ratio is degraded when the probe impedance rises in relation to parallel combined impedances of cable and receiver circuits. The impedance of n layers of ceramic can be reduced to 1/ n 2 of a single ceramic layer, thus permitting the S/N ratio to be raised. A co-firing multilayer method is introduced to achieve a multilayer ceramic with large adhesive strength. As a result, the S/N ratio has been improved as much as 8 dB over that of conventional probes under the same drive voltage.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAPS.28S1.54