Condenser microphone and method for manufacturing the same

Details Condenser microphone and method for manufacturing the same Condenser microphone and method for manufacturing the same

2005-12-14

2009-11-17

Le, Huyen D (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C381S191000

Reexamination Certificate

active

07620191

ABSTRACT:
A condenser microphone includes a housing and a microphone unit arranged within the housing. The microphone unit includes an annular retainer oriented in confronting relation to the front end wall of the housing, a movable diaphragm connected to the annular retainer, an annular spacer connected to one side of the movable diaphragm opposite the annular retainer, a substrate including a back electrode oriented in confronting relation to the movable diaphragm and having an electret thereon, and a printed circuit board having electronic components. The back electrode is operatively associated with the movable diaphragm to constitute a condenser. The condenser has a variable electric capacitance. The electronic components of the printed circuit board develop an electric signal in response to a change in the electrical capacitance between the movable diaphragm and the back electrode. A conductive adhesive is employed to sealingly hold the annular retainer against the front end wall of the housing.

REFERENCES:
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patent: 4281222 (1981-07-01), Nakagawa et al.
patent: 4456796 (1984-06-01), Nakagawa et al.
patent: 5272758 (1993-12-01), Isogami et al.
patent: H11-088992 (1999-03-01), None
patent: 2003-230195 (2003-08-01), None

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