Patent ID: 8157953

Claim:
A plasma processing apparatus, comprising: a vacuum-evacuable processing chamber; a first lower electrode that supports a substrate to be processed thereon in the processing chamber; an upper electrode disposed above the first lower electrode and facing the first lower electrode; a second lower electrode disposed under the first lower electrode, the second lower electrode being electrically isolated from the first lower electrode; a processing gas supply unit that supplies a processing gas into a space between the upper electrode and the first lower electrode; a first high frequency power supply unit connected to the first lower electrode that applies a first high frequency power of a first frequency to the first lower electrode; and a second high frequency power supply unit connected to the second lower electrode that applies a second high frequency power of a second frequency higher than the first frequency to the second lower electrode, wherein the first high frequency power supply unit includes a first power feeder having a ring shape electrically connected to the first lower electrode at a peripheral portion thereof, wherein the second high frequency power supply unit includes a second power feeder connected to the second lower electrode at a central portion thereof, and wherein the first lower electrode is horizontally attached to an upper portion of an inner surface of the first power feeder, and wherein the second lower electrode is disposed inside the first power feeder while being electrically isolated from the first power feeder.