Patent ID: 6362560
Filing Date: 2002-03-26
Classification: H01L

Abstract:
A multi-layer piezoelectric center-drive ceramic transformer comprising a plurality of piezoelectric ceramic blanks disposed in a stack, said piezoelectric ceramic blanks each comprising a top cover layer, a bottom cover layer and at least one odd-number layer and at least one even-number layer alternatively sandwiched in between said top cover layer and said bottom cover layer, first and second inner electrode layers of reversed polarities respectively printed on said at least one odd-number layer, third and fourth inner electrode layers of reversed polarities respectively arranged on said at least one even-number layer, first and second output terminal electrodes respectively arranged on two distal ends of the at least one odd-number layer and at least one even-number layer of each of said piezoelectric ceramic blanks, and first and second input terminal electrodes respectively arranged on two opposite lateral sides of each of the at least one odd-number layer and at least one even-number layer of each of said piezoelectric ceramic blanks, the first input terminal electrodes of the at least one odd-number layer and at least one even-number layer of each of said piezoelectric ceramic blanks being respectively connected to said first inner electrode layers and said third inner electrode layers, the second input terminal electrodes of the at least one odd-number layer and even-number layer of each of said piezoelectric ceramic blanks being respectively connected to said second inner electrode layers and said fourth inner electrode layers.