Title:
ELASTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/158370
Kind Code:
A1
Abstract:
Provided is an elastic wave device that can be reduced in size. This elastic wave device 1 comprises a substrate 6 having a piezoelectric layer 5, an IDT electrode 7, and first and second reflectors 8, 9, the elastic wave device 1 being such that: a first bus bar 11 or a second bus bar 12 of the IDT electrode 7, and at least one of first and second connecting parts 17, 18 at both ends of the first and second reflectors 8, 9, have a comb electrode part; the comb electrode part has a plurality of third electrode fingers 17a connected to the first or second bus bar 11, 12, and a plurality of fourth electrode fingers 17b connected to the first or second connecting part 17, 18; and a dielectric film 19 is provided so as to cover the comb electrode part.
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Inventors:
DAIMON KATSUYA (JP)
Application Number:
PCT/JP2022/000942
Publication Date:
July 28, 2022
Filing Date:
January 13, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/25
Domestic Patent References:
| WO2012127793A1 | 2012-09-27 | |||
| WO2019065667A1 | 2019-04-04 |
Foreign References:
| JPH077369A | 1995-01-10 | |||
| JP2019121873A | 2019-07-22 | |||
| JP2020053876A | 2020-04-02 | |||
| JP2017199984A | 2017-11-02 |
Attorney, Agent or Firm:
OSAKA FRONT (JP)
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