| 发明名称 |
ULTRASONIC TRANSMITTER/RECEIVER, PROCESS FOR PRODUCING THE SAME, AND ULTRASONIC FLOWMETER |
| 摘要 |
<p>An ultrasonic transmitter/receiver comprising a piezoelectric (2) for transmitting/receiving an ultrasonic wave, and acoustic matching layers (3a, 3b) composed of dry gel. The acoustic matching layers (3a, 3b) are formed of a plurality of dry gel layers having a different acoustic impedance.</p> |
| 申请公布号 |
WO2004057913(A1) |
申请公布日期 |
2004.07.08 |
| 申请号 |
WO2003JP15499 |
申请日期 |
2003.12.03 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;NAGAHARA, HIDETOMO;HASHIDA, TAKASHI;SUZUKI, MASAAKI |
发明人 |
NAGAHARA, HIDETOMO;HASHIDA, TAKASHI;SUZUKI, MASAAKI |
| 分类号 |
H01L41/08;G01F1/66;G10K11/02;H04R17/00;(IPC1-7):H04R17/00 |
主分类号 |
H01L41/08 |
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