Acoustic imaging of the substance inside using super-high sensitivity air-coupled P(VDF/TrFE) transducers in air

偏氟乙烯与三氟乙烯共聚物[P(VDF/TrFE)]在压电聚合物中耦合系数最大（kt=0.3）。此外，由于P（VDF/TrFE）换能器的低声阻抗，可以在MHz范围内发射和接收超声波。在本研究中，使用溶液铸造法制造的P（VDF/TrFE）换能器，在空气中的MHz范围内尝试对内部物质进行声学成像。结果表明，使用2.5 MHz的空气耦合P（VDF/TrFE）换能器的声成像成功地显示了一个IC芯片（ROCKWELL/11229-12）。

Copolymer of vinylidene fluoride and trifluoroethylene [P(VDF/TrFE)] has the largest coupling factor (kt=0.3) among piezoelectric polymers.Furthermore, it is possible to transmit and receive the ultrasonic waves at MHz range,because of that low acoustic impedance of P(VDF/TrFE) transducer. In this study, Acousticimaging of the substance inside was tried using P(VDF/TrFE) transducers made by asolution casting method for use in the MHz range in air. As the results, acoustic imagingusing the air coupled P(VDF/TrFE) transduces at 2.5 MHz had succeeded to display a chipof IC (ROCKWELL/11229-12).