Patent ID: 7581296
Filing Date: 2009-09-01
Classification: B06B,H01L,Y10T

Abstract:
1. A method for preparing a piezoelectric ceramic workpiece for use in an ultrasonic transducer, comprising the steps of: providing a piezoelectric ceramic layer, wherein said piezoelectric ceramic layer comprises a plurality of ceramic posts isolated from each other by non-conductive material and wherein said plurality of ceramic posts extend above said non-conductive material; plating said piezoelectric ceramic layer with conductive material; forming a first electrode and a second electrode on said piezoelectric ceramic layer from said conductive material on said plurality of ceramic posts; poling said first electrode and said second electrode on said piezoelectric ceramic layer, wherein said poling activates said plurality of ceramic posts; and dicing said piezoelectric ceramic layer, wherein said dicing forms a plurality of isolation cuts removing said conductive material and thereby forming a plurality of signal electrodes from said first electrode and a plurality of ground electrodes from said second electrode, wherein said isolation cuts extend through only a portion of the thickness of said piezoelectric ceramic layer.