Elastic wave device
US10840878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2017 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Jun 13, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6496
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An elastic wave device includes an IDT electrode disposed on a piezoelectric substrate and including first and second electrode fingers that are interdigitated. A region where the first and second electrode fingers overlap each other as seen in a direction of propagation of elastic waves is an excitation region. Edge portions where an acoustic velocity is lower than an acoustic velocity in a central portion are disposed on opposite sides of a central portion in the excitation region. A first busbar and second busbar include inner busbar portions, central busbar portions, and outer busbar portions. First and second offset electrode fingers extend from the inner busbar portions toward the leading ends of the second electrode fingers or first electrode fingers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.