Communications – electrical: acoustic wave systems and devices – Signal transducers
Patent
1997-04-28
1998-11-24
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
310334, 310358, 310367, 310369, H04R 1700, H01L 4108
Patent
active
058417362
ABSTRACT:
A transducer including a ceramic body having a base and an array of tube-shaped piezoelectric or electrostrictive ceramic elements integral with the base. A first electrode contacts the tube wall inner surface, while a second electrode contacts the tube wall outer surface and is electrically isolated from the first electrode and from the lower surface of the transducer. The first electrode extends onto the transducer lower surface for electrical connection to a power source for driving the transducer across the tube walls for d.sub.31 mode vibration of the tube walls. A stiff cover plate may be used to transmit the tube wall vibration to a desired medium. The ceramic base may be removed if an electrically insulating layer is provided between the elements at the lower surface of the transducer. The insulating layer and tube wall upper edges then electrically isolate the second electrode from the first electrode and the transducer lower surface. In this alternative, the first and second electrodes are provided by a stiff conductive polymer matrix filling the tube-shaped elements and spaces between the elements. The matrix upper surface transmits the tube wall vibration to a desired medium without a cover plate. The first electrode extends onto the composite body lower surface for electrical connection to a source of electric power for driving the transducer across the tube walls for d.sub.31 mode vibration of the tube walls. A net-shape molding method for producing the transducer is also described.
REFERENCES:
patent: 5173605 (1992-12-01), Hayes et al.
patent: 5598050 (1997-01-01), Bowen et al.
Bowen Leslie J.
Near Craig D.
Craig Frances P.
Lobo Ian J.
Materials Systems Incorporated
LandOfFree
Low voltage piezoelectric transducer and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low voltage piezoelectric transducer and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low voltage piezoelectric transducer and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1710870