Hybrid resonant structure
US7609132B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Feb 21, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2003/0414
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bulk wave acoustic resonant structure which is in accordance with the invention allows the difficulties encountered at high frequency, the impossibility of working at low frequency on simple structures and the absence of an adequate coupling level to be overcome. The invention therefore proposes the use of an additional layer of material which covers the upper electrode of a piezoelectric transducer in order to localize the position of maximum intensity of the dynamic stress close to the centre of the piezoelectric layer through the effect of propagation.The structure that is in accordance with the invention may be associated with Bragg mirrors and various uses are presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.