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US 10,312,883 B2Granted
Elastic wave device
AssigneeMurata Manufacturing Co., Ltd.
InventorsMichio Kadota, Tetsuya Kimura, Kenya Hashimoto, Shuji Tanaka
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Abstract
An elastic wave device includes a first IDT electrode on a first main surface of a LiNbO3 substrate, and a second IDT electrode on a second main surface thereof. The application of alternating voltages with reversed phases to each other to the first and second IDT electrodes excites plate waves in which SH waves in a high order mode predominate. The elastic wave device uses the plate waves in the high order mode in which the SH waves predominate.
Claims17
An elastic wave device comprising:
- a LiNbO3 substrate including a first main surface and a second main surface on an opposite side of the first main surface;
- a first IDT electrode provided on the first main surface of the LiNbO3 substrate;
- and
- a second IDT electrode provided on the second main surface of the LiNbO3 substrate so as to be opposed to the first IDT electrode across the LiNbO3 substrate;
- wherein
- a plate wave in a high order mode in which an SH wave predominates is excited in the LiNbO3 substrate as an elastic wave in response to alternating voltages of reversed phases to each other being applied to the first IDT electrode and the second IDT electrode.
3 more elements
An elastic wave device comprising:
- a LiNbO3 substrate including a first main surface and a second main surface on an opposite side of the first main surface;
- an IDT electrode provided on the first main surface of the LiNbO3 substrate;
- and
- an electrode film provided on the second main surface of the LiNbO3 substrate so as to occupy an entire area enclosed with outer edges of the IDT electrode in a plan view from a side of the first main surface;
- wherein
- a plate wave in a high order mode in which an SH wave predominates is excited in the LiNbO3 substrate as an elastic wave in response to an alternating voltage being applied to the IDT electrode.
3 more elements
Dependencies are inferred from the claim text.