Micromachined ultrasound transducer using multiple piezoelectric materials
US11711067B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Feb 18, 2020 |
| Grant date | Jul 25, 2023 |
| Priority date | — |
| Expiry date | Aug 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2009/155
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transducer includes first and second piezoelectric layers made of corresponding different first and second piezoelectric materials and three or more electrodes, implemented in two or more conductive electrode layers. The first piezoelectric layer is sandwiched between a first pair of electrodes and the second piezoelectric layer is sandwiched between a second pair of electrodes. The first and second pairs of electrodes contain no more than one electrode that is common to both pairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.