Patent ID: 8135150

Claim:
An electret condenser microphone comprising: a metal capsule having a top surface provided with sound holes for receiving sound; a diaphragm; a back electrode plate that faces either one of surfaces of the diaphragm and that is provided separately from the capsule; and an electret layer formed on the back electrode plate or the diaphragm, the diaphragm, the back electrode plate and the electret layer being all mounted inside the capsule, wherein the top surface includes a suctioned portion in its center on which suction force can be applied by a suction-type transporting device, wherein the sound holes are formed circumferentially around the suctioned portion, wherein the top surface includes a first top surface and a second top surface projecting from a central area of the first top surface; the suctioned portion is formed in the second top surface; and the sound holes are formed in a boundary between the first top surface and the second top surface.