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:
Jan. 30, 2007
Filed:
Dec. 01, 2003
Toshiro Izuchi, Fukuoka, JP;
Hiroshi Yamagata, Fukuoka, JP;
Naosuke Fukada, Fukuoka, JP;
Hideki Kozawa, Dusseldorf, DE;
Toshiro Izuchi, Fukuoka, JP;
Hiroshi Yamagata, Fukuoka, JP;
Naosuke Fukada, Fukuoka, JP;
Hideki Kozawa, Dusseldorf, DE;
Hosiden Corporation, Osaka, JP;
Abstract
Affixed in intimate contact to the inside surface of a front boardof a conductive capsuleprovided with a receiving sound apertureis a conductive back electrode board provided with air vent apertureswhich are positioned not in alignment with the receiving sound aperture, these aperturesandbeing connected by a slitA polarized FEP filmwhich is an electret film is disposed on the surface of the back electrode boardopposite from the front board 10, and a conductive diaphragmis disposed on the surface of the FEPopposite from the back electrode boardwith a spacerinterposed therebetween which extends around the outer periphery of the opposite surface of the FEPThese component parts are accommodate in the capsuleto constitute an electret condenser microphone which is capable of suppressing sensitivity degradation due to ingress of grit from the outside to the electret film.