Patent ID: 6121718
Filing Date: 2000-09-19
Classification: H01L

Abstract:
A multilayered transducer array comprising:at least one kerf extending along an elevation axis;an array element comprising:a signal flex circuit;a first piezoelectric layer adhesively bonded to the signal flex circuit, the first layer having a positive electrode and a negative electrode and a first discontinuity on a top surface of the first layer separating the positive and negative electrode wherein the positive electrode covers a majority of the top surface of the first layer and the negative electrode covers a majority of the bottom surface of the first layer;a second piezoelectric layer adhesively bonded to the first layer, the second layer having a positive and a negative electrode and a first discontinuity on a top surface of the second layer wherein the negative electrode covers a majority of the top surface of the second layer and a second discontinuity on the bottom surface of the second layer wherein the positive electrode covers a majority of the bottom surface of the second layer;a third piezoelectric layer adhesively bonded to the second layer wherein the third layer has a positive electrode and a negative electrode wherein the positive electrode covers a majority of the top surface of the third layer and a second discontinuity separating the positive electrode from the negative electrode on a bottom surface of the third layer wherein the negative electrode covers a majority of the bottom surface of the third layer; wherein the first discontinuity of the first layer abuts and is aligned with the second discontinuity of the second layer and the first discontinuity of the second layer abuts and is aligned with the second discontinuity of the third layer; anda ground flex circuit adhesively bonded to the third layer;wherein each of said adhesive bonds maintains a point to point contact between said electrodes of said layers.