Elastic boundary wave device
US7471027B2 · kind B2 · utility
13Cited by
5References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2003 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Dec 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02559
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A boundary acoustic wave device includes a dielectric substance that is laminated on one surface of a piezoelectric substance, an IDT and reflectors used as electrodes are disposed at a boundary between the piezoelectric substance and the dielectric substance, and the thicknesses of the electrodes are set such that the acoustic velocity of the SH type boundary acoustic wave is less than that of a slow transverse wave propagating in the dielectric substance and than that of a slow transverse wave propagating in the piezoelectric substance, so that a boundary acoustic wave device is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.