Electretization method and apparatus

Details Electretization method and apparatus Electretization method and apparatus

2007-02-06

2011-12-06

Ni, Suhan (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C381S369000, C381S175000

Reexamination Certificate

active

08073166

ABSTRACT:
While a dielectric film is set to have a ground potential, a fixed electrode is set to have a different potential from the ground potential. Thereafter, ions produced by corona discharge are allowed to pass through a plurality of acoustic holes formed in the fixed electrode and reach the dielectric film, thereby electretizing the dielectric film.

REFERENCES:
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patent: 2003-282360 (2003-10-01), None
patent: 2005-020411 (2005-01-01), None
patent: WO 97/39464 (1997-10-01), None
PCT/JP2006/311248, not yet published, Matsushita Electric Ind Co LTD.

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