Patent ID: 6966225

Claim:
An accelerometer comprising: a capacitive sensing device that includes a movable electrode structure, a stationary electrode structure and a liquid, wherein the movable electrode structure includes a plurality of movable plates, the stationary electrode structure includes a plurality of stationary plates, the movable and stationary plates are asymmetrically interleaved with each other, gaps are disposed between corresponding ones of the movable and stationary plates, the liquid is disposed in the gaps and contacts the movable and stationary plates, the movable electrode structure moves towards the stationary electrode structure in response to a force applied to the capacitive sensing device, the stationary electrode structure remains stationary in response to the applied force, and the gaps decrease in response to the applied force, thereby creating a displacement between the movable and stationary electrode structures in response to the applied force; and circuitry coupled to the capacitive sensing device for determining from the displacement an electric signal indicative of acceleration of the applied force.