| 摘要 |
PURPOSE:To provide the sound wave transducer element in which a thickness of a sample is measured with high precision. CONSTITUTION:A transmission use electroacoustic transducer element 14 and a reception use electroacoustic transducer element 16 are provided to a lower end of a support member 12. The electroacoustic transducer elements 14,16 are structured that electrodes 18,22 are laminated on upper and lower surfaces of a dielectric layer 20 such as an inorganic high polymer piezoelectric film. The transmission use electroacoustic transducer element 14 and the reception use electroacoustic transducer element 16 are formed by forming the lower end of the support member 12 to be spherical, laminating the dielectric layer 20 and the electrodes 18, 22 the spherical surface and providing a groove 24 to surface. Thus, the lower surfaces of the electrodes 22 of the electroacoustic transducer elements 14,16 are both parts of the same spherical surface. |
