Electrode layers are formed on planes of a plate-shaped piezoelectric element to provide an ultrasonic transducer material. The ultrasonic transducer material is bonded to an electrically insulating substrate by electrically conductive adhesive. A plurality of conductors is provided on the substrate...http://www.google.se/patents/US4747192?utm_source=gb-gplus-sharePatent US4747192 - Method of manufacturing an ultrasonic transducer
