Patent ID: 8055489
Filing Date: 2011-11-08
Classification: H01L,H02N

Abstract:
1. A method of using a circuit simulator to simulate an effect of trapped charge in an electrostatic chuck on the electrostatic chuck performance, the method comprising: creating a trapped-charge electrical model by coupling a trapped charge capacitor to a gap-trapped resistor and to a grain resistor; selecting a capacitance value C selecting a resistance value R selecting a resistance value R creating an electrostatic chuck simulation circuit by coupling a substrate-to-chuck interface gap capacitor with a substrate-to-chuck interface gap resistor, a substrate resistor, at least one cable resistor, and a plurality of voltage sources; configuring at least one of the plurality of voltage sources to provide a time-varying voltage; coupling the trapped-charge electrical model with the electrostatic chuck simulation circuit; and executing a first simulation in the circuit simulator to determine time-varying voltage and currents responses within a plurality of circuit nodes in the electrostatic chuck simulation circuit.