PURPOSE: To obtain a structure which is superior in water resisting property and wear resistance and is stable electrically, by forming preliminarily an operation face-side electrode on a surface additional film and sticking this electrode to a piezoelectric film or plate to form an ultrasonic transducer structure material.
CONSTITUTION: An operation face-side electrode 4' of a high polymer piezoelectric film 3 is formed on a surface additional film 5 consisting of polyester or the like while sticking by the known method, and a metal such as Al, an optional alloy, a conductive paint such as a silver paste, or a metallic foil is used as materials of the electrode. Next, the piezoelectric film 3 is stuck to this electrode 4'. A supporting substrate (acoustic absorber) 1, a rear electrode 2, and the piezoelectric film and the electrode 4' formed on the additional film which are stuck into one body by said method are stuck to a metallic case 6, and a conductor 8 is led out. Thus, the stability, the reliability, and the life of the ultrasonic transducer are improved, and transducers having various structures are produced easily.
ANDOU AKIROU
SUZUKI MIYO
