Electret condensor microphone
US8135150B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2007 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | Jan 11, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electret condenser microphone comprising a metal capsule having a top surface provided with sound receiving holes, a diaphragm, a back electrode plate that faces either one of surfaces of the diaphragm and that is provided separately from the capsule, and an electret layer formed on the back electrode plate or the diaphragm. The diaphragm, the back electrode plate and the electret layer are all mounted inside the capsule. The top surface includes a suctioned portion in its center on which suction force can be applied by a suction-type transporting device, and the sound holes are formed circumferentially around the suctioned portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.