Surface acoustic wave device and duplexer having transmission/reception filter using same
US10468584B2 · kind B2 · utility
0Cited by
0References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2017 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | May 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/883
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave device includes a piezoelectric substrate and an IDT electrode on the piezoelectric substrate. The IDT electrode includes a main electrode layer and a barrier layer between the piezoelectric substrate and the main electrode layer. The main electrode layer is inside a region in which the barrier layer is provided in plan view to suppress diffusion between the piezoelectric substrate and the main electrode layer when a voltage is applied to the IDT electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.