Ultrasonic transducer
First Claim
1. A transducer comprising:
- a ceramic substrate having a top surface, a bottom surface, a front surface, a back surface, a left side surface and a right side surface;
a first layer of electrically conductive material disposed on said top surface and said front surface of said substrate;
a piezoelectric device including a sheet of piezoelectric material, said sheet having one side electrically connected to and covering said first layer of electrically conductive material on said top surface of said substrate, said device further including an electrically conductive electrode on the other side of said sheet;
an inner conductor attached to and electrically connected with said first layer of electrically conductive material on said front surface of said substrate;
an insulative coating covering said inner conductor, said layer of electrically conductive material on said front surface, and said back, bottom, left side and right side surfaces of said substrate;
a drain wire wound on said insulative coating on said inner conductor and disposed against said insulative coating covering said substrate; and
an electrically-conductive coating covering said insulative coating on said front surface, back surface, bottom surface, left side surface, right side surface, and said drain wire, said electrically-conductive coating being electrically connected to the electrode provided on the other side of said piezoelectric sheet so that said substrate and said piezoelectric sheet are completely encased in electrically conductive material provided by said electrically conductive coating and said electrode provided on the other side of said piezoelectric sheet so as to electrically shield said substrate and said piezoelectric sheet.
5 Assignments
0 Petitions
Accused Products
Abstract
A miniature transducer designed for use in a medical imaging system catheter probe is disclosed. The transducer has an electric cavity and coaxial construction for preventing electric fields from being emitted or received by the transducers. The construction of the transducer enables two to be mounted very close to one another on a thin catheter probe, one for transmitting acoustic pulses and the other for sensing echoes in response to the acoustic pulses, for imaging extremely close targets. The transducers can be secured to the catheter probe in such a way as to substantially acoustically isolate one from the other.
A method of making the transducer by applying several electrically-conductive and insulating coatings and layers to a core in selected sequence so as to create a transducer having an electrical cavity, coaxial construction.
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Citations
15 Claims
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1. A transducer comprising:
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a ceramic substrate having a top surface, a bottom surface, a front surface, a back surface, a left side surface and a right side surface; a first layer of electrically conductive material disposed on said top surface and said front surface of said substrate; a piezoelectric device including a sheet of piezoelectric material, said sheet having one side electrically connected to and covering said first layer of electrically conductive material on said top surface of said substrate, said device further including an electrically conductive electrode on the other side of said sheet; an inner conductor attached to and electrically connected with said first layer of electrically conductive material on said front surface of said substrate; an insulative coating covering said inner conductor, said layer of electrically conductive material on said front surface, and said back, bottom, left side and right side surfaces of said substrate; a drain wire wound on said insulative coating on said inner conductor and disposed against said insulative coating covering said substrate; and an electrically-conductive coating covering said insulative coating on said front surface, back surface, bottom surface, left side surface, right side surface, and said drain wire, said electrically-conductive coating being electrically connected to the electrode provided on the other side of said piezoelectric sheet so that said substrate and said piezoelectric sheet are completely encased in electrically conductive material provided by said electrically conductive coating and said electrode provided on the other side of said piezoelectric sheet so as to electrically shield said substrate and said piezoelectric sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification