Patent ID: 8416970
Filing Date: 2013-04-09
Classification: B81B,B81C,H04R

Abstract:
1. A condenser microphone array chip comprising: a substrate having a plurality of openings running through its thickness; a first insulating layer formed in an outer periphery of each of the openings of the substrate; a first electrode layer which is formed above the first insulating layer and stretched over each of the openings of the substrate; a second insulating layer which is formed above the first electrode layer in the outer periphery of each of the openings of the substrate; a second electrode layer which is formed above the second insulating layer and which is positioned relative to the first electrode layer via an air gap therebetween, wherein a plurality of structures of condenser microphones is formed using the first insulating layer, the first electrode layer, the second insulating layer, and the second electrode layer above the plurality of openings of the substrate with a plurality of air cavities, wherein the plurality of structures of condenser microphones is connected in parallel via a plurality of bridges and two-dimensionally aligned on the substrate with a plurality of channels therebetween, wherein the plurality of channels is formed to circumvent the plurality of bridges such that at least the second insulating layer is partially removed from the plurality of channels, and wherein the plurality of bridges is formed using the second electrode layer serving as wiring connecting the plurality of structures of condenser microphones.