Patent ID: 6351055
Filing Date: 2002-02-26
Classification: H03H

Abstract:
A composite piezoelectric component comprising:a plurality of piezoelectric resonant elements each including a substrate having a first major surface and a second major surface disposed opposite to each other, at least two vibrating electrodes disposed on the first and second major surfaces, respectively, so that one of the at least two vibrating electrodes disposed on the first major surface opposes the other of the at least two vibrating electrodes disposed on the second major surface with the substrate disposed therebetween, a ground electrode connected to ground and disposed on at least one of the first and second major surfaces, and each of the plurality of piezoelectric resonant elements being stacked on each other so that the major surface of one substrate opposes the major surface of another substrate; conductive joining members arranged to electrically connect at least two of the vibrating electrodes and the ground electrodes of stacked adjacent ones of the plurality of piezoelectric resonant elements and to mechanically bond the stacked adjacent ones of the piezoelectric resonant elements; each of the substrates of the piezoelectric resonant elements other than the piezoelectric resonant element located on the top of the composite piezoelectric component includes a plurality of piezoelectric substrate portions, a conductive material portion arranged between the plurality of piezoelectric substrate portions, the ground electrodes being provided on the first and second major surfaces of the substrate in the conductive material portion and the plurality of ground electrodes of the piezoelectric elements being electrically connected to one another via the conductive material portions and the conductive joining members, and the resonant element located on the top of the composite piezoelectric component includes a plurality of substrate portions, a conductive material portion arranged between the plurality of piezoelectric substrate portions, the resonant element located on the top of the composite piezoelectric component being joined to other piezoelectric resonant elements via the conductive joining members.