Patent ID: 8018298
Filing Date: 2011-09-13
Classification: H03H

Abstract:
1. An acoustic wave device comprising; a first resonator having a piezoelectric substance sandwiched between a pair of electrodes in a direction of an c-axis orientation or a polarization axis; and a second resonator that is connected in series with the first resonator and has another piezoelectric substance sandwiched between another pair of electrodes so that one of the another pair of electrodes located in the direction of the c-axis orientation or the polarization axis is at a potential equal to that of one of the pair of electrodes of the first resonator in the direction of the c-axis orientation or the polarization axis; wherein the first resonator has a section in which the pair of electrodes overlaps across the piezoelectric substance has an area different from that of another section of the second resonator in which the another pair of electrodes overlaps across the another piezoelectric substance.