Boundary acoustic wave device
US7355319B2 · kind B2 · utility
7Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2004 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Dec 27, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/0222
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dielectric substance is laminated on one surface of a piezoelectric substance, and an IDT and reflectors are disposed as electrodes at a boundary between the piezoelectric substance and the dielectric substance, and the thickness of the electrodes is determined so that the acoustic velocity of the Stoneley wave is decreased less than that of a slow transverse wave propagating through the dielectric substance and that of a slow transverse wave propagating through the piezoelectric substance, thereby forming a boundary acoustic wave device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.