Patent ID: 8265309

Claim:
A condenser microphone comprising: a substrate having a through cavity; a supporting member connected to the substrate and located in the cavity, the supporting member defining a first surface away from the substrate, a second surface opposite to the first surface, and an opening extending from the first surface to the second surface, the supporting member further having a periphery portion and a plurality of stationary electrodes extending from the periphery portion toward a center of the supporting member, each of the stationary electrodes having a first top surface, a first bottom surface opposite to the first top surface and a first thickness; a diaphragm, located in the opening, defining a third surface away from the supporting member, a fourth surface opposite to the third surface and facing to the substrate, the diaphragm having a vibrating member and sustaining members connected to the vibrating member, the vibrating member defining a plurality of movable electrodes protruding from a periphery of the vibrating member, each movable electrode having a second bottom surface facing to the substrate, a second top surface opposite to the second bottom surface and a second thickness; wherein each of the movable electrodes is located between two adjacent stationary electrodes, and each of the stationary electrodes is located between two adjacent movable electrodes.