ULTRASONIC TRANSDUCER HAVING MATCHING LAYER HAVING COMPOSITE STRUCTURE AND METHOD FOR MANUFACTURING SAME

摘要

Disclosed are an ultrasonic transducer having a matching layer having a composite structure, and a method for manufacturing same. The ultrasonic transducer, according to one embodiment of the present invention, comprises: an active element which comprises at least one piezoelectric element; and a matching layer which is formed on the front surface of the active element, has a structure of at least two layers, and matches the acoustic impedance between the active element and an object being inspected, wherein, in order to match the acoustic impedance between the active element and the object being inspected, the matching layer has 2N number of layers each having acoustic impedance sizes that are different from each other by using N number (N is an integer and N≥2) of materials.