Microfabricated ultrasonic transducers with bias polarity beam profile control and method of operating the same
US7087023B2 · kind B2 · utility
83Cited by
20References
47Claims
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Key dates
| Filing date | Feb 14, 2003 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Apr 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capacitive microfabricated ultrasonic transducer with control of elevation phase through alternating bias polarity is disclosed. Such control of elevation phase results in simple ultrasonic probes with excellent slice thickness attributes. Furthermore, tight spatial variation of phase results in an effective way to achieve transmit aperture and apodization control. Further still, such capacitive microfabricated ultrasonic transducers can achieve elevation focus without the need of a lossy mechanical lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.