Acoustic wave device
US11984869B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2021 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Dec 27, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/14541
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic wave device includes a piezoelectric body including first and second main surfaces facing each other, an IDT electrode provided on the first main surface of the piezoelectric body and including electrode fingers, a high acoustic velocity member on the second main surface side of the piezoelectric body, in which an acoustic velocity of a propagating bulk wave is higher than an acoustic velocity of an acoustic wave propagating through the piezoelectric body, and a first dielectric film provided on an upper surface of the electrode fingers, in which a portion where a dielectric is not present is provided between the electrode fingers of the IDT electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.