Patent ID: 6031198
Filing Date: 2000-02-29
Classification: H01J

Abstract:
A method of performing plasma processing of a substrate using a first high-frequency power and a second high-frequency power with a frequency lower than that of the first high-frequency power, comprising:a discharge beginning step of supplying the second high-frequency power, which is smaller than a power used in processing, into a processing chamber through an impedance matching circuit and then supplying the first high-frequency power, which is larger than a power used in processing, into said processing chamber to generate a plasma;an adjustment step of reducing a magnitude of the first high-frequency power to be close to a value used in processing, increasing a magnitude of the second high-frequency power to be close to a value used in processing, and then adjusting the magnitude of the first high-frequency power to obtain a plasma strength of a predetermined value; anda plasma processing step of causing said impedance matching circuit to perform a matching operation and simultaneously adjusting a value of the first high-frequency power to obtain a plasma strength of a desired value in processing.