发明名称 |
Method of driving ultrasonic transducer |
摘要 |
An ultrasonic transducer includes a piezoelectric resonator including a pair of electrodes sandwiching a piezoelectric body and provided with the backing layer in contact with one of the electrodes of the piezoelectric resonator and having the same acoustic characteristic impedance as the piezoelectric body. A method includes the step of driving the ultrasonic transducer so as to satisfy a condition: 2Th<=Td<=6Th where Th is a propagation time of an ultrasonic wave in the piezoelectric body sandwiched by the pair of electrodes, and Td is a pulse width of a drive pulse driving the piezoelectric resonator.
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申请公布号 |
US7638924(B2) |
申请公布日期 |
2009.12.29 |
申请号 |
US20050595518 |
申请日期 |
2005.03.29 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
ASADA TAKAAKI;MORITA SEIICHI |
分类号 |
H01L41/08;G01N29/07;G01N29/24;G01N29/32;G01N29/34 |
主分类号 |
H01L41/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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