Patent ID: 8142674
Filing Date: 2012-03-27
Classification: H01J,H01L

Abstract:
1. A plasma processing method for subjecting a processing substrate to plasma processing, the method comprising the steps of: storing a processing substrate in a processing chamber, attracting and supporting the processing substrate electrostatically on an electrostatic chuck mechanism of a substrate electrode, providing plasma to the processing substrate from a plasma generator, and supplying bias voltage to the processing substrate on the substrate electrode from a bias voltage supplier; acquiring an impedance value of the electrostatic chuck mechanism by measuring a waveform of a voltage of a processing substrate for measurement placed on the substrate electrode, a waveform of the bias voltage supplied to the electrostatic chuck mechanism and a waveform of a bias current flowing through the electrostatic chuck mechanism, and storing the acquired impedance value of the electrostatic chuck mechanism in an impedance value storage device; and estimating a non-sinusoidal waveform of the voltage including multiple frequency components of the processing substrate to be subjected to plasma processing by a voltage waveform estimator, using a time domain model formula, using a non-sinusoidal waveform of the bias voltage including multiple frequency components and a non-sinusoidal waveform of the bias current including multiple frequency components applied to the processing substrate actually subjected to plasma processing, and using the acquired impedance value of the electrostatic chuck mechanism.