Acoustic resonator
US12401343B2 · kind B2 · utility
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3References
10Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 20, 2022 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | May 30, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/174
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An acoustic resonator includes a substrate and a resonant portion. The resonant portion has a central portion in which a first electrode, a first piezoelectric layer, a second piezoelectric layer, and a second electrode are stacked in order on the substrate, and an extension portion extending outwardly from the central portion and including an insertion layer. A ratio of an average thickness of the first piezoelectric layer to an average thickness of the second piezoelectric layer is 18.4% to 40%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.