Elastic wave device
US11374550B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2018 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Apr 29, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/25
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An elastic wave device includes first mass adding films provided on a first dielectric film to overlap with first and second electrodes fingers of an IDT electrode when seen from above, extend in a direction in which the first and second electrode fingers extend, and are provided in a center region, and second and third mass adding films that are provided on the first dielectric film and are provided in first and second edge regions, respectively, and a portion of which overlap with at least one of the first and second electrode fingers when seen from above. Dimensions of the second and third mass adding films along an elastic wave propagation direction are larger than a dimension of the first mass adding films along the elastic wave propagation direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.