Title:
ACOUSTIC WAVE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/082806
Kind Code:
A1
Abstract:
An acoustic wave element 1 is provided with: an IDT electrode 4 that includes a plurality of electrode fingers 41; a piezoelectric layer 30 which has the IDT electrode 4 positioned on the upper surface thereof, which has a thickness less than 0.35 λ, where λ denotes a wavelength defined by two-fold of the repeating interval of the electrode fingers 41, which is made of a lithium tantalite single crystal, and which has Euler angles of 90±1, 90±2, 20 to 50; and a substrate 20 in which a transverse wave acoustic velocity V(m/s) is 5800 m/s or higher and which has a first surface joined to the lower surface of the piezoelectric layer 30.
Inventors:
KISHINO TETSUYA (JP)
ITO MOTOKI (JP)
ITO MOTOKI (JP)
Application Number:
PCT/JP2018/038985
Publication Date:
May 02, 2019
Filing Date:
October 19, 2018
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
H03H9/25; H03H9/145
Domestic Patent References:
| WO2012086441A1 | 2012-06-28 | |||
| WO2011037145A1 | 2011-03-31 | |||
| WO2016104598A1 | 2016-06-30 | |||
| WO2018097016A1 | 2018-05-31 |
Foreign References:
| JP2006524016A | 2006-10-19 | |||
| JP3187231U | 2013-11-14 | |||
| JPH08316781A | 1996-11-29 | |||
| JPH10178331A | 1998-06-30 | |||
| JP2006025396A | 2006-01-26 |
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