| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent degradation of acoustic properties involved in vibration of a transducer element. <P>SOLUTION: A transducer element 1 vibrates to transmit and receive an ultrasonic wave. A buffer layer 5 is provided on the back side of the transducer element 1. A backing material 6 is provided on the back side of the buffer layer 5 and damps an ultrasonic wave from the transducer element 1. The buffer layer 5 has a Poisson ratio larger than that of the backing material 6. <P>COPYRIGHT: (C)2013,JPO&INPIT |
