Patent ID: 7728487

Claim:
An ultrasound transducer device manufactured by using a micromachining process having an ultrasound transducer comprising: a first electrode into which a control signal for transmitting ultrasound is input; a substrate on which the first electrode is formed; a second electrode that is a ground electrode facing the first electrode with a prescribed space between the first and second electrodes; a membrane on which the second electrode is formed and which vibrates and generates the ultrasound when voltage is applied between the first and second electrodes; a first piezoelectric film formed on the second electrode formed on a surface of the membrane; and a third electrode that is connected to the first piezoelectric film and faces the second electrode via the piezoelectric film, said ultrasound transducer device comprising: a conversion unit boosting an alternating current low voltage signal conveyed from a conveying cable, and converting it into a direct current voltage signal; a first switching unit switching an electrical connection between the conversion unit and the first electrode; a self oscillating unit performing self oscillation on the basis of the direct current voltage signal input into the first electrode in order to drive the ultrasound transducer to transmit ultrasound; a reception signal processing unit performing a prescribed signal process on a reception signal created on the basis of the ultrasound received by the ultrasound transducer; and a second switching unit switching an electrical connection between the conversion unit and the reception signal processing unit.