Energy-trapping-by-frequency-lowering-type piezoelectric resonance device
US4939403A · kind A · utility
30Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Dec 29, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/178
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An energy trapping type piezoelectric resonance device utilizing higher-order harmonics of the thickness extensional vibration mode comprising a body formed of a piezoelectric material and three or more electrodes arranged overlapping with each other and separated by the piezoelectric material layers in the direction of thickness of the body, wherein respective portions of the piezoelectric material layers interposed between the electrodes are polarized and at least respective portions of the piezoelectric material layers which are not interposed between the electrodes is polarized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.