The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2009
Filed:
Dec. 14, 2005
Haruhisa Tanabe, Fujiyoshida, JP;
Atsushi Kanemaru, Fujiyoshida, JP;
Haruhisa Tanabe, Fujiyoshida, JP;
Atsushi Kanemaru, Fujiyoshida, JP;
Citizen Electronics Co., Ltd., Fujiyoshida-shi, Yamanashi-ken, JP;
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.