Surface acoustic wave device including a confinement layer
AssigneeMurata Manufacturing Co., Ltd.
InventorsHajime Kando, Keiji Okada
Life of this patent
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Abstract
In a surface acoustic wave device, a plurality of surface acoustic wave elements include piezoelectric bodies having the same cut-angle. A propagation azimuth of a surface acoustic wave in at least one of surface acoustic wave elements is different from a propagation azimuth of a surface acoustic wave in at least another one of the surface acoustic wave elements. In each of the surface acoustic wave elements, a confinement layer configured to confine the surface acoustic wave inside the piezoelectric body is disposed on the piezoelectric body at the side opposite to the side where an electrode is located.
Claims16
A surface acoustic wave device comprising:
- a plurality of surface acoustic wave elements including piezoelectric bodies having a same cut-angle and each configured to use a surface acoustic wave with a higher acoustic velocity than a bulk wave that propagates through the piezoelectric body;
- wherein
- each of the plurality of surface acoustic wave elements includes an IDT electrode disposed on the piezoelectric body, and a confinement layer disposed on the piezoelectric body at a side opposite to a side where the IDT electrode is disposed and configured to confine the surface acoustic wave inside the piezoelectric body;
- in the plurality of surface acoustic wave elements, a propagation azimuth of the surface acoustic wave in at least one of the plurality of surface acoustic wave elements is different from a propagation azimuth of the surface acoustic wave in at least another one of the plurality of surface acoustic wave elements.
Dependencies are inferred from the claim text.