Patent ID: 11950054
Assignee: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A MEMS condenser microphone, comprising a base plate, a spacer and a membrane, wherein the membrane is supported above the base plate by the spacer, and the base plate, the spacer, and the membrane enclose a vacuum cavity;
an end of the membrane close to the vacuum cavity is connected, by means of a connecting rod, to an electrostatic clutch; and
the electrostatic clutch is connected to a capacitive sensing structure;
the electrostatic clutch comprises:
multiple arrays of high impedance nodes (HIN) electrodes, wherein a respective pass-through channel is formed between any two arrays of the multiple arrays of HIN electrodes; and
multiple arrays of biased electrodes, wherein each array of the multiple arrays of biased electrodes moves back and forth in the respective pass-through channel, such that electrostatic force is generated between the multiple arrays of biased electrodes and the multiple arrays of HIN electrodes;
each array of the multiple arrays of HIN electrodes comprises a plurality of HIN electrodes and a grounded part, an insulating silicon oxide layer is provided between adjacent HIN electrodes of the plurality of HIN electrodes, and the grounded part is electrically connected to the plurality of HIN electrodes and to ground.