Patent ID: 8628640

Claim:
A plasma processing system comprising: a processing container whose inner pressure can be reduced, a first electrode arranged in the processing container, the first electrode being supplied a first high-frequency electric power and a second high-frequency electric power, a process gas supplying part that supplies a process gas into the processing container, a tubular supporting part that supports the first electrode, the tubular supporting part forming a space together with a bottom surface of the first electrode such that said space is disposed within the tubular supporting part below the first electrode, a high-frequency electric power supplying part arranged in the space, and a power supply rod connecting the high-frequency electric power supplying part to the first electrode, wherein the high-frequency electric power supplying part further comprises: a first high-frequency electric power source unit that outputs the first high-frequency electric power having a first frequency, wherein the frequency of the first high-frequency electric power is higher than the frequency of the second high-frequency electric power, a first matching unit directly connected to the power supply rod for impedance matching of the first high-frequency electric power, a second matching unit for impedance matching of the second high-frequency electric power, a coaxial tube and a filter which connect the first electrode to the second matching unit, the filter removing frequencies other than the frequency of the second high-frequency electric power, and a transmission line that transmits the first high-frequency electric power from the first high-frequency electric power source unit to the first matching unit, wherein the transmission line is less than 500 mm, and wherein the first matching unit is contained in a first housing located just under the first electrode, the second matching unit is contained in a third housing located under the first matching unit, the first high-frequency electric power supplying part is contained in a fourth housing located under the second matching unit, and the first matching unit is arranged closer to the first electrode than the second matching unit is to the first electrode.