Ultrasonic transducer
US11701689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2019 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Nov 11, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/092
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There are provided an ultrasonic transducer and methods for designing and manufacturing the same. The ultrasonic transducer includes a piezoelectric composite layer configured to be in acoustic communication with a sample and having at least partially decoupled acoustic impedance and electrical impedance properties. The piezoelectric composite layer includes an array of spaced-apart piezoelectric regions, each being made from a piezoelectric material, a filler material positioned between adjacent spaced-apart piezoelectric regions, the filler material comprising a polymer matrix and a non-piezoelectric material in contact with the polymer matrix. In some embodiments, the ultrasonic transducer includes an electrically insulating non-piezoelectric composite layer extending over the piezoelectric composite layer for electrically insulating the piezoelectric composite layer from the sample, the electrically insulating non-piezoelectric composite layer being acoustically matched to the piezoelectric composite layer and the sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.