Patent ID: 6689948
Filing Date: 2004-02-10
Classification: G10H

Abstract:
Transducer for converting mechanical stress into electric signals, said transducer comprising:a transducer part and a connection part; at least one transducer element with a first and a second side; at least one dielectric layer at least on the first side of the transducer element; at least one signal electrode, said signal electrode being arranged in between the transducer element and the dielectric layer; at least one ground electrode being arranged on the second side of the transducer element; wherein the transducer element is a dielectric electret film containing a permanent electric charge; wherein the transducer part has a unitary laminated structure; and wherein the signal electrode is on the first side of the dielectric layer, between the dielectric layer and the transducer element, and the ground electrode is on the second side of the dielectric layer, and wherein said electrodes continue unitary from the transducer part as a connection part for connecting the transducer to a signal processing device.