Patent ID: 8039910

Claim:
An electro-acoustic sensing device, comprising: a sensing chip for electro-acoustic transducing and outputting an electrical signal, wherein the sensing chip comprises: at least one first connecting point; a first cavity whose top opening intercommunicates with the outside of the electro-acoustic sensing device; a vibration membrane located at the bottom of the sensing chip and covering a bottom opening of the first cavity; a back plate disposed below the vibration membrane in parallel and separated from the vibration membrane by an interval; and an integrated circuit disposed inside the sensing chip for receiving a signal outputted from the back plate; a carrier chip disposed below the sensing chip, the carrier chip having at least one second connecting point, at least one electrical channel and at least one channel connecting point, wherein the second connecting point is electrically contacted with the first connecting point, the second connecting point and the channel connecting point are located at different surfaces of the carrier chip, and the electrical channel passes through the carrier chip and electrically connects the second connecting point and the channel connecting point; and a sealing element disposed between the sensing chip and the carrier chip for air-tight coupling the sensing chip and the carrier chip; wherein the electrical signal is transmitted to the channel connecting point via the first connecting point, the second connecting point and the electrical channel.