Title:
ELASTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/220889
Kind Code:
A1
Abstract:
The present invention provides an elastic wave device in which the response caused by Rayleigh waves is suppressed. An elastic wave device 1 comprises: an IDT electrode 5 that is provided upon a piezoelectric substrate; and reflector electrodes 6, 7 that are respectively disposed on both sides of the IDT electrode 5 in the elastic wave propagation direction, and have a plurality of electrode fingers 6a or 7a disposed with gaps therebetween. The elastic wave device 1 further comprises, in a region where the gaps and the plurality of electrode fingers 6a, 7a of the reflector electrodes 6, 7 are provided, dielectric films 10, 11 that are disposed between the piezoelectric substrate and the reflector electrodes 6, 7.
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Inventors:
DAIMON KATSUYA (JP)
Application Number:
PCT/JP2021/016055
Publication Date:
November 04, 2021
Filing Date:
April 20, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/25
Domestic Patent References:
| WO2015151706A1 | 2015-10-08 | |||
| WO2019044203A1 | 2019-03-07 |
Foreign References:
| JP2008067289A | 2008-03-21 | |||
| JP2013518455A | 2013-05-20 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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