Title:
ELASTIC WAVE DEVICE AND LADDER-TYPE FILTER
Document Type and Number:
WIPO Patent Application WO/2022/131237
Kind Code:
A1
Abstract:
Provided is an elastic wave device that, when used for an elastic wave resonator, is capable of narrowing the fractional bandwidth, and when used for a band-pass type filter, is capable of narrowing the bandwidth and increasing steepness. An elastic wave device 1 in which a piezoelectric layer 5 is laminated directly or indirectly on a support substrate 2, an IDT electrode 6 is provided on the piezoelectric layer 5, and an intersection region K has a central region C and first and second edge regions E1, E2, is provided on a second main surface 5b side of the piezoelectric layer 5, overlaps, in plan view, at least a portion of the first and the second edge regions E1, E2, and is provided with first and second conductive layers 4A and 4B so as to overlap at least a portion of first and second bus bars 7b, 8b.
Inventors:
DAIMON KATSUYA (JP)
NAGATOMO SHO (JP)
NAGATOMO SHO (JP)
Application Number:
PCT/JP2021/045960
Publication Date:
June 23, 2022
Filing Date:
December 14, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/25; H03H9/64
Domestic Patent References:
| WO2020184466A1 | 2020-09-17 | |||
| WO2020209359A1 | 2020-10-15 | |||
| WO2020045442A1 | 2020-03-05 |
Foreign References:
| JP2019080093A | 2019-05-23 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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