A STRUCTURE FOR IMPROVED RECEIVER SENSITIVITY OF ULTRASONIC TRANSDUCERS FOR MEDICAL

摘要

PURPOSE: A structure for improving the reception of a medical ultrasonic transducer is provided to improve the sensitivity of transceiving ultrasonic waves of the ultrasonic transducer by composing a piezoelectric layer with a combination of a single-crystal having excellent reception quality and a PZT having excellent reception quality. CONSTITUTION: A piezoelectric layer(110) mutually converts a sound signal and an electric signal through a vibration of piezoelectric materials. A matching layer(120) reduces a difference of sound impedance between the piezoelectric layer and a human body to deliver ultrasonic waves generated in the piezoelectric layer to a target of the human body. A lens layer(130) concentrates the ultrasonic waves heading for the front of the piezoelectric layer on a specific spot. A backing layer(140) prevents an image distortion by blocking the ultrasonic waves heading for the rear of the piezoelectric layer.