Patent ID: 6594369
Filing Date: 2003-07-15
Classification: H01L,H04R

Abstract:
An electret capacitor microphone comprising:a surface conductive diaphragm; a fixed electrode provided opposite to the diaphragm at a fixed interval; and a solid state device for converting a change in an electrostatic capacity between the diaphragm and the fixed electrode induced by a sound signal given to the diaphragm into an electric signal, wherein the electret capacitor microphone is provided with a dielectric casing defining a bottomed hollow portion for accommodating the diaphragm, the fixed electrode and the solid state device, and wherein a conductive path is applied to an outer surface of the dielectric casing, an upper surface of an opening of the dielectric casing is metallized, a spacer in contact with the diaphragm is provided on an inner surface, and the upper surface of the opening is bonded to a metal cover with a conductive adhesive, thereby electrically connecting the diaphragm and the conductive path.