Patent ID: 7277267
Filing Date: 2007-10-02
Classification: G01D

Abstract:
1. A capacitive transducer of multi-layered construction comprising: a fixed frame; a first rotor plate including two sides, said first rotor plate being movable with respect to said fixed frame, and functioning as a pickup plate; a second rotor plate including two sides, said second rotor plate being movable with respect to said fixed frame; a plurality of flexible springs supporting said rotor plates, the springs each including two ends, each end having a pre-determined width; a stem separating and rigidly connecting said first rotor plate with said second rotor plate; a first drive electrode; a second drive electrode; a first gap spacer disposed between said first drive electrode and a first side of said first rotor plate, said first gap spacer defining a nominal gap spacing between said first drive electrode and said first rotor plate, said first gap spacer including an opening larger than said first rotor plate, whereby said opening in said gap spacer allows said rotor plate to move towards said first drive electrode by a deflection of said flexible springs; and a second gap spacer disposed between said second drive electrode and a second side of said first rotor plate, said second gap spacer defining a nominal gap spacing between said second drive electrode and said first rotor plate, said gap spacer including an opening larger than said first rotor plate, whereby said opening in said second gap spacer allows said rotor plate to move towards said second drive electrode by a deflection of said flexible springs.