Title:
ELASTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/043301
Kind Code:
A1
Abstract:
Provided is an elastic wave device that can reduce the size and suppress deterioration of filter characteristics of a ladder-type filter device having an elastic wave resonator that has a small capacitance and uses a thickness-shear mode bulk wave. The elastic wave device includes a plurality of acoustic elements. At least one of the plurality of acoustic elements has a third electrode located between a first comb-shaped electrode and a second comb-shaped electrode and connected to a potential different from that of the first comb-shaped electrode and second comb-shaped electrode. In a support member, an acoustic reflecting portion (cavity portion) is formed at a position overlapping each functional electrode of the plurality of acoustic elements.
Inventors:
NAGATOMO SHO (JP)
DAIMON KATSUYA (JP)
DAIMON KATSUYA (JP)
Application Number:
PCT/JP2023/030460
Publication Date:
February 29, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145
Domestic Patent References:
| WO2022163865A1 | 2022-08-04 | |||
| WO2021230315A1 | 2021-11-18 |
Foreign References:
| US10833650B1 | 2020-11-10 | |||
| JP2019154031A | 2019-09-12 |
Attorney, Agent or Firm:
OSAKA FRONT (JP)
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