Acoustic wave element, filter element, and communication device
US10333487B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 2015 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Feb 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6483
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic wave element of the present invention includes a piezoelectric substrate, an excitation electrode which is arranged on the piezoelectric substrate and includes a plurality of electrode fingers, and two reflectors arranged on the piezoelectric substrate, each of which includes a plurality of reflection electrode fingers, which sandwich the excitation electrode therebetween in the propagation direction of an acoustic wave. The excitation electrode includes a main region in the center vicinity of the line of the plurality of electrode fingers in which the intervals between the centers of the plurality of electrode fingers are uniformly a first interval. In the reflector, at least one of the reflection electrode fingers shifts to the excitation electrode side relative to virtual electrode finger positions which are repeatedly set at the first intervals from the electrode fingers in the main region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.