Patent ID: 8404137
Filing Date: 2013-03-26
Classification: H01J

Abstract:
1. A plasma processing method in which a radio-frequency power is supplied to at least one of radio-frequency electrodes provided in a processing chamber and opposing each other vertically, to thereby generate in the processing chamber plasma with which a substrate is processed, the method comprising: feeding using a common feeding line a plurality of radio-frequency powers having frequencies different from each other to a same radio-frequency electrode; extracting radio-frequency powers having predetermined frequencies, which are ones among the frequencies, from radio-frequency powers fed via the feeding line and measuring voltages thereof; retaining in advance impedance information related to respective radio-frequency systems constituted of the plurality of radio-frequency powers and the same radio-frequency electrode; and correcting the measured voltages using predetermined impedance information which are retained in advance or obtained and calculating voltages of the radio-frequency powers having the predetermined frequencies at the same radio-frequency electrode, to thereby comprehend the progress of a process of the substrate.