Acoustic wave device
AssigneeMurata Manufacuturing Co., Ltd.
InventorMinefumi Ouchi
Life of this patent
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Abstract
An acoustic wave device includes a piezoelectric layer and first and second electrodes. The piezoelectric layer is made of lithium niobate or lithium tantalate. The first electrode and the second electrode oppose each other in a direction intersecting with a thickness direction of the piezoelectric layer. The first electrode and the second electrode are electrodes adjacent to each other. d/p is about 0.5 or smaller, where d is a thickness of the piezoelectric layer and p is a center-to-center distance between the first electrode and the second electrode. An intersecting width is about 4.6 p or greater. The intersecting width is a dimension of a region where the first electrode and the second electrode oppose each other. The direction of the dimension is an extending direction of the first electrode and the second electrode.
Claims20
An acoustic wave device comprising:
- a piezoelectric layer made of lithium niobate or lithium tantalate;
- and
- a first electrode and a second electrode that oppose each other in a direction intersecting with a thickness direction of the piezoelectric layer;
- wherein
- the acoustic wave device utilizes a bulk wave of a thickness shear mode;
- and
- an intersecting width is about 4.6 p or greater, where p is a center-to-center distance between the first electrode and the second electrode, the intersecting width being a dimension of a region where the first electrode and the second electrode oppose each other, a direction of the dimension being an extending direction of the first and second electrodes.
An acoustic wave device comprising:
- a piezoelectric layer made of lithium niobate or lithium tantalate;
- and
- a first electrode and a second electrode that oppose each other in a direction intersecting with a thickness direction of the piezoelectric layer;
- wherein
- the first electrode and the second electrode are electrodes adjacent to each other;
- d/p is about 0.5 or smaller, where d is a thickness of the piezoelectric layer and p is a center-to-center distance between the first electrode and the second electrode;
- and
- an intersecting width is about 4.6 p or greater, the intersecting width being a dimension of a region where the first electrode and the second electrode oppose each other, a direction of the dimension being an extending direction of the first and second electrodes.
Dependencies are inferred from the claim text.