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US 12,726,169 B2Granted
Acoustic wave device
AssigneeMurata Manufacturing Co., Ltd.
InventorsSho Nagatomo, Tetsuya Kimura, Takashi Yamane
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Abstract
An acoustic wave device includes a piezoelectric layer made of lithium niobate or lithium tantalate, and first and second electrodes opposed to each other in a direction that intersects with a thickness direction of the piezoelectric layer. The first and second electrodes are adjacent electrodes, and, when a thickness of the piezoelectric layer is d and a distance between centers of the first and second electrodes is p, d/p is less than or equal to about 0.5.
Claims25
An acoustic wave device comprising:
- a piezoelectric layer made of lithium niobate or lithium tantalate;
- and
- a first electrode and a second electrode opposed to each other in a direction that intersects with a thickness direction of the piezoelectric layer;
- wherein
- the acoustic wave device uses bulk waves in a first thickness-shear mode such that waves propagate substantially in the thickness direction of the piezoelectric layer.
2 more elements
An acoustic wave device comprising:
- a piezoelectric layer made of lithium niobate or lithium tantalate;
- and
- a first electrode and a second electrode opposed to each other in a direction that intersects with a thickness direction of the piezoelectric layer;
- wherein
- the first electrode and the second electrode are adjacent electrodes;
- and
- when a thickness of the piezoelectric layer is (d) and a distance between a center of the first electrode and a center of the second electrode is (p), d/p is less than or equal to about 0.5.
4 more elements
Dependencies are inferred from the claim text.