Patent ID: 8551003

Claim:
An ultrasonic probe comprising: a Capacitive Micromachined Ultrasonic Transducer (cMUT) chip having a plurality of vibration elements to transmit or receive an ultrasonic wave; a mounting board on which electrical parts for controlling the vibration elements are mounted; an electrical wiring portion to connect the mounting board and the cMUT chip; a casing portion for storing the cMUT chip, the mounting board and the electrical wiring portion; and an acoustic lens for converging the ultrasonic wave from the cMUT chip; wherein an insulating portion is provided between the mounting board and the casing portion; wherein the cMUT chip, the electrical wiring portion and the mounting board are stored in a closed space formed by a conductive film and a ground layer having a ground potential; wherein a part of the ground layer is provided along an ultrasonic wave radiation side of the cMUT chip and is provided along a backward side of the acoustic lens.