Patent ID: 8513563

Claim:
A plasma processing method comprising the steps of: disposing a first and a second electrode in parallel with a gap present therebetween in an evacuable processing chamber which is grounded; connecting the first electrode with a ground potential via a capacitive member and an inductive member, both being electrically arranged in parallel; supporting a target substrate on the second electrode to face the first electrode; vacuum exhausting an inside of the processing chamber to a specific pressure level; and supplying a processing gas into a processing space defined by the first and the second electrode and a sidewall of the processing chamber while applying to the second electrode a first radio frequency power of a first frequency and a second radio frequency power of a second frequency lower than the first frequency, thereby generating a plasma from the processing gas in the processing space and performing a specified process on the target substrate by using the plasma, wherein in frequency-impedance characteristics of a radio frequency transmission line from a boundary surface between the processing space and the first electrode to the ground potential via the first electrode, the frequency-impedance characteristics are set to make an impedance corresponding to the second frequency lower than that corresponding to the first frequency.