Patent ID: 8529730

Claim:
A plasma processing apparatus comprising: a vacuum-evacuable processing chamber; a first upper electrode disposed in the processing chamber to face a plasma space; a second upper electrode disposed at a rear side of the first upper electrode when viewed from the plasma space and provided with a recess at a bottom surface thereof, the recess being filled with a dielectric material; a processing gas supply unit for supplying a processing gas into the plasma space; a first power supply unit connected to the first upper electrode for applying a direct current to the first upper electrode; a second power supply unit connected to the second upper electrode for applying a high frequency power to the second upper electrode to generate a uniform plasma in the processing chamber; and a lower electrode disposed opposite to the first upper electrode in parallel thereto with the plasma space present therebetween, wherein the first upper electrode and the second electrode are electrically isolated from each other, wherein the first upper electrode is a shower head, and wherein the first upper electrode is configured to control a plasma potential of the generated plasma or to increase a density of the generated plasma using the direct current.