Acoustic wave device
US12191842B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2022 |
| Grant date | Jan 7, 2025 |
| Priority date | — |
| Expiry date | Aug 18, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/54
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic wave device includes a piezoelectric layer, first and second upper electrodes, first and second lower electrodes, and first and second acoustic reflection films. In plan view, first and second resonator portions are respectively defined by portions where the first upper electrode and the first lower electrode overlap and where the second upper electrode and the second lower electrode overlap. The first and second acoustic reflection films respectively include first and second metal layers. First and second overlapping portions are respectively defined by portions where only the first upper electrode overlaps with the first metal layer and where only the second upper electrode overlaps with the second metal layer. An area of the first resonator portion is smaller than an area of the second resonator portion and an area of the first overlapping portion is larger than an area of the second overlapping portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.