Skyworks Solutions, Inc.
ACOUSTIC WAVE DEVICE WITH VARYING ELECTRODE PITCH

Abstract:

A surface acoustic wave resonator comprises interdigital transducer (IDT) electrodes disposed on an upper surface of a piezoelectric substrate between first and second reflector gratings each including reflector electrodes. The IDT electrodes include a central region having a first width in a direction perpendicular to an extension direction of the IDT electrodes and edge regions each having a second width on opposite sides of the central region. The IDT electrodes have a lesser average pitch in the central region than an average pitch of the IDT electrodes in each of the edge regions. The reflector electrodes have a lesser average pitch than the average pitch of the IDT electrodes in the central region.