An ultrasonic transducer comprises: an acoustic matching layer including at least a layer made up of a hard material; a piezoelectric member of which the length dimension is shorter than this acoustic matching layer, which is fixed and disposed at a predetermined position of a layer made up of the hard...http://www.google.es/patents/US7285898?utm_source=gb-gplus-sharePatente US7285898 - Ultrasonic transducer and manufacturing method thereof
Ultrasonic transducer and manufacturing method thereof
