Patent ID: 6862938

Claim:
A differential capacitive type MEMS sensor apparatus provided with a capacitance compensator having a MEMS structure, which is provided with a MEMS base substrate and a MEMS structure including fixed and movable frames supported by the base substrate, and has differential capacitances generated by external force, comprising: a fixed frame unit including first and second fixed frames prepared in pairs, partially fixed to the MEMS base substrate and separated from each other; a movable frame unit movably connected to the MEMS base substrate so that first capacitance is generated between the movable frame unit and the first fixed frame and second capacitance is generated between the movable frame unit and the second fixed frame, said first capacitance and said second capacitance constituting the differential capacitances; first capacitance compensating frame units, each including a movable frame movably connected to the first fixed frame of the fixed frame unit, and a movable electrode fixed to the MEMS base substrate, for moving the movable frame, and serving to compensate for the first capacitance using capacitances generated between the movable frames and the movable electrodes; and second capacitance compensating frame units, each including a movable frame movably connected to the second fixed frame of the fixed frame unit, and a movable electrode fixed to the MEMS base substrate, for moving the movable frame, and serving to compensate for the second capacitance using capacitances generated between the movable frames and the movable electrodes.