Patent ID: 9641152
Date: 2017-05-02
CPC Classifications: H03H

Claim:
1. An acoustic wave device comprising: a piezoelectric substrate; and an Interdigital Transducer (IDT) formed on the piezoelectric substrate, including electrode fingers, and exciting an acoustic wave, wherein an anisotropy coefficient is positive, an overlap region where the electrode fingers of the IDT overlap each other includes a center region located in a center of the overlap region in an extension direction of the electrode finger and an edge region located at an edge of the overlap region in the extension direction, the electrode finger in the center region and the electrode finger in the edge region are continuously formed, the electrode finger in the edge region is inclined with respect to the electrode finger in the center region so that a pitch in a width direction of the electrode finger in the edge region is greater than a pitch in a width direction of the electrode finger in the center region, and an angle between the width direction of the electrode finger in the center region and a crystal axis orientation of the piezoelectric substrate is less than an angle between the width direction of the electrode finger in the edge region and the crystal axis orientation.