Title:
ACOUSTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/139076
Kind Code:
A1
Abstract:
Provided is an acoustic wave device which is capable of more reliably suppressing transverse modes. An acoustic wave device 1 according to the present invention is provided with: a piezoelectric substrate 2 which has a convexed slowness surface; an IDT electrode 7 which is provided on the piezoelectric substrate 2; and a mass addition film 8 which is superposed on the IDT electrode 7. The IDT electrode 7 has: a central region B; first and second edge regions Ca, Cb; first and second gap regions Da, Db, which are positioned outside the first and second edge regions; first and second inner bus bar regions Ea, Eb; and first and second outer bus bar regions Ha, Hb. The mass addition film 8 is superposed on at least the first and second edge regions Ca, Cb and the first and second inner bus bar regions Ea, Eb.
Inventors:
DAIMON KATSUYA (JP)
Application Number:
PCT/JP2019/000513
Publication Date:
July 18, 2019
Filing Date:
January 10, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/25
Domestic Patent References:
| WO2014192756A1 | 2014-12-04 | |||
| WO2017043427A1 | 2017-03-16 |
Foreign References:
| JP2017175276A | 2017-09-28 | |||
| US7939987B1 | 2011-05-10 | |||
| JP2013544041A | 2013-12-09 | |||
| JP2013518455A | 2013-05-20 | |||
| JP2016119569A | 2016-06-30 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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