Patent ID: 9013134
Filing Date: 2015-04-21
Classification: G03F,H02P

Abstract:
1. A method for controlling a mover assembly that moves and positions a stage relative to a stage base, the method comprising the steps of: controlling the mover assembly with a control system to position the stage at a first test position; applying a first set of excitation signals with the control system to the mover assembly with the stage at the first test position; determining a first set of control commands for each of the excitation signals of the first set; controlling the mover assembly with the control system to position the stage at a second test position that is different than the first test position; applying a second set of excitation signals with the control system to the mover assembly with the stage at the second test position; determining a second set of control commands for each of the excitation signals of the second set; and generating a compensation map from the first set of control commands and the second set of control commands, and controlling the mover assembly with the control system utilizing information from the compensation map.