Boundary acoustic wave device
US7737603B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2004 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Mar 17, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6483
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A boundary acoustic wave device includes a solid layer laminated onto a single crystal substrate, electrodes provided between the single crystal substrate and the solid layer, and boundary acoustic wave elements provided on the single crystal substrate having the same cut angle, wherein the propagation direction of one of the boundary acoustic wave elements is different from that of at least one of the other boundary acoustic wave elements. A compact and high-performance boundary acoustic wave device using a boundary acoustic wave is provided by increasing the steepness of a filter band and by forming filters or resonators with different fractional bandwidths on a single substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.