Electret transducer
US6658938B2 · kind B2 · utility
5Cited by
4References
11Claims
0Family size
Inventor
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transducer with at least one variable-area capacitor comprising a flexible electrode with a surface facing a surface of a cooperating rigid electrode and an electret affixed to a portion of one of said surfaces, wherein said surface of said rigid electrode has a contoured region selected to increase a region of substantially fixed capacitance spacing as said flexible electrode deflects in response to an applied stress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.