Patent ID: 9689453
Date: 2017-06-27
CPC Classifications: F16F

Claim:
1. An active vibration absorber for a semiconductor processing apparatus, the active vibration absorber comprising: a mounting portion that is attachable to a structure of a processing station of the semiconductor processing apparatus, the structure incorporating a positioning system which serves to vibrate the structure during its operation; an inertial mass that is resiliently coupled to the mounting portion; a force actuator which is operative to controllably move the inertial mass relative to the mounting portion; and a reference table responsive to motion commands which are given by the semiconductor processing apparatus; wherein the force actuator is configured to move the inertial mass relative to the mounting portion according to a motion profile during a motion cycle of the positioning system in order to attenuate vibrations in the structure, the motion profile being determined from the reference table based upon a motion command which is operative to drive the positioning system during the motion cycle.