Patent ID: 8398551

Claim:
A capacitive ultrasonic probe comprising: one or more capacitive ultrasonic transducer cells; an impedance matching portion adapted to match an acoustic impedance of a tissue, and an acoustic impedance of one or more of the capacitive ultrasonic transducer cells, the impedance matching portion being arranged with intervening between a membrane, which is a component of the capacitive ultrasonic transducer cell, and the tissue which is an object, and comprising at least one layer of acoustic matching layer which performs impedance matching between an apparent acoustic impedance of the membrane at the time of seeing the membrane as a sound medium, and the acoustic impedance of the tissue; a capacitive ultrasonic transducer; and a sheath which includes the capacitive ultrasonic transducer, wherein the impedance matching portion is arranged on an inner wall on a side of the sheath so as to be separated from the capacitive ultrasonic transducer.