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:
Apr. 17, 2007
Filed:
Jul. 21, 2005
Takao Kawamura, Sakai, JP;
Yoshiaki Ohbayashi, Nara, JP;
Mamoru Yasuda, Yao, JP;
Hosiden Electronics Co., Ltd., Yao-shi, JP;
Abstract
The present invention relates to a semiconductor electret condenser microphone capable of being reduced in size and including an acoustic sensorand a casefor accommodating the acoustic sensor, the acoustic sensorhas a semiconductor chipforming necessary electronic circuitsA toC, and opening a through holeaway from the electronic circuitsA toC, an electrode layerformed on the surface of the semiconductor chipaway from the through hole, an electret memberlaminated away from part of the electrode layerand through hole, and a diaphragmprovided with a spacingto the electret member, in which the electrode layerexposed from the electret memberis connected to the electrodeof the electronic circuitA through the case(FIG.).