A capacitive transducer of multi-layer construction includes two rotor
plates supported by flexible springs, the plates being spaced apart and
rigidly connected by a stem. One rotor plate my be used as either a
pickup electrode or a grounded target electrode for determining position,
displacement, or load force. The second rotor plate may be used for
electrostatic actuation without interfering with or destroying circuitry
associated with the first rotor plate. A number of improvements are
disclosed including a hollow rotor plate structure for reduced moving
mass, buckling resistant features for the springs, improved spring anchor
joint design for reduced creep and hysteresis, and material selection and
matching for reduced thermal sensitivity.