Composite ultrasonic transducer

摘要

In a composite ultrasonic transducer (1b), each of a plurality of piezoelectric ceramic columns (2b) included in a resin plate (3b) has a circular cross-section and passes through the resin plate (3b) in a direction of a thickness of the resin plate (3b), and central axes of the piezoelectric ceramic columns (2b) are arranged at positions corresponding to nodes of a triangle network.