ELASTIC WAVE DEVICE AND FILTER DEVICE

WIPO Patent Application WO/2024/009660

A1

Provided is an elastic wave device that makes it possible to suppress unwanted waves and to suppress degradation of resonance characteristics.　This elastic wave device comprises a piezoelectric substrate including a piezoelectric layer, and an IDT electrode 8 provided on the piezoelectric layer. The IDT electrode 8 has first and second bus bars 14, 15 opposing each other, a plurality of first electrode fingers 16 having one end connected to the first bus bar 14, and a plurality of second electrode fingers 17 having one end connected to the second bus bar 15. The plurality of first and second electrode fingers 16, 17 interdigitate. A section where the first electrode fingers 16 and the second electrode fingers 17 overlap each other in an elastic wave propagation direction is an intersecting region D. As regards the shape of the plurality of first and second electrode fingers 16 and 17, a curved section is included when observed in a planar view. Within the intersecting region D, the resonance frequencies or the anti-resonance frequencies substantially coincide with each other.

JP2001217672	SURFACE ACOUSTIC WAVE ELEMENT AND ITS MANUFACTURING METHOD
JP5828032	Elastic wave element and antenna duplexer using this
JPS61157112	SURFACE ACOUSTIC WAVE RESONATOR

YABU TAKUYA (JP)
NAKAGAWA RYO (JP)
NAKAMURA KENTARO (JP)

PCT/JP2023/020462

January 11, 2024

June 01, 2023

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MURATA MANUFACTURING CO (JP)

H03H9/145; H03H9/25

WO2016208446A1	2016-12-29
WO2019139076A1	2019-07-18

JP2017187420A	2017-10-12
JPH0750548A	1995-02-21
JPH08222992A	1996-08-30
JP2019080093A	2019-05-23
JPH0974330A	1997-03-18

OSAKA FRONT (JP)

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