Patent ID: 7506610

Claim:
A plasma processing apparatus comprising: a process container configured to have a vacuum atmosphere therein; an inner upper electrode disposed to face a target substrate placed at a predetermined position within the process container; an outer upper electrode having a ring shape, disposed radially outside the inner upper electrode, and electrically insulated from the inner upper electrode; a process gas supply system configured to supply a process gas into the process container; a first RF power supply configured to output a first RF; an electric feeder configured to supply the first RF output from the first RF power supply to the inner upper electrode and the outer upper electrode, the electric feeder comprising a central conductive member connected to a central portion of the inner upper electrode, a first cylindrical conductive member surrounding the central conductive member and substantially continuously connected to the outer upper electrode in an annular direction, and a conductive connector connecting the first cylindrical conductive member to the central conductive member, such that the first RF is branched by the conductive connector and supplied to the central conductive member and the first cylindrical conductive member; and a second cylindrical conductive member surrounding the first cylindrical conductive member and connected to ground potential, wherein: a radius ratio of a radius of the second cylindrical conductive member relative to a radius of the first cylindrical conductive member is set to be within a range of from 1.5 to 1.7, the outer upper electrode comprises a first electrode member connected to the electric feeder, and a second electrode member detachably mounted on a bottom surface of the first electrode member to face the substrate, the first electrode member has a cooling medium passage for a cooling medium to flow therethrough, and a film or sheet is disposed between the first electrode member and the second electrode member, and configured to reduce thermal resistance therebetween.