ELASTIC WAVE DEVICE

WIPO Patent Application WO/2023/013742

A1

The present invention suppresses an elastic wave leak. This elastic wave device comprises: a support member comprising a support substrate having a thickness in a first direction; a piezoelectric layer provided in the first direction of the support member; and an IDT electrode which has a plurality of electrode fingers provided on the main surface of the piezoelectric layer and extending in a second direction crossing the first direction, a first busbar electrode to which the plurality of first electrode fingers are connected, a plurality of second electrode fingers facing any one among the plurality of first electrode fingers in a third direction perpendicular to the second direction and extending in the second direction, and a second busbar electrode to which the plurality of second electrode fingers are connected. When viewed in a plan view in the first direction, the piezoelectric layer includes a first piezoelectric body and a second piezoelectric body, which has a different dielectric polarization state than the first piezoelectric body, in a gap region between at least one of the first electrode fingers and the second busbar electrode or between at least one of the second electrode fingers and the first busbar electrode.

NAGATOMO SHO (JP)

PCT/JP2022/030014

February 09, 2023

August 04, 2022

Click for automatic bibliography generation  

MURATA MANUFACTURING CO (JP)

H03H9/25

WO2020209359A1	2020-10-15
WO2021125013A1	2021-06-24

JP2014110457A	2014-06-12
JP2019021997A	2019-02-07
JP2003332880A	2003-11-21

SAKAI INTERNATIONAL PATENT OFFICE (JP)

View/Download PDF      PDF Help

Previous Patent: ELASTIC WAVE DEVICE

Next Patent: HOLDING PARAMETER ESTIMATION DEVICE AND HOLDING PARAMETER ESTIMATION METHOD