Ultrasonic sensor
US8098000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Mar 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/521
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic sensor for detecting an object includes: a piezoelectric element having a piezoelectric body and first and second electrodes for sandwiching the piezoelectric body; an acoustic matching element having a reception surface, which receives an ultrasonic wave reflected by the object; and a circuit electrically coupled with the piezoelectric element via a wire. The piezoelectric element is embedded in the acoustic matching element so that the acoustic matching element covers at least the first electrode, a part of a sidewall of the piezoelectric element and a part of the wire between the circuit and the piezoelectric element, and the sidewall of the piezoelectric element is adjacent to the first electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.