Patent ID: 8012306

Claim:
A plasma processing chamber having a plasma processing region and a plasma cleaning region, the plasma processing chamber comprising: (a) a bottom electrode assembly defined by, (i) an inner bottom electrode defining the plasma processing region, and (ii) an outer bottom electrode disposed outside of the inner bottom electrode, the outer bottom electrode defining the plasma cleaning region, wherein the inner bottom electrode is configured to support a substrate and the outer bottom electrode is placed under a conductive ring; (iii) a dielectric disposed between the inner bottom electrode and the outer bottom electrode, the dielectric electrically isolating the inner bottom electrode from the outer bottom electrode; (iv) a switch connecting radio frequency (RF) power to either the inner bottom electrode or the outer bottom electrode; and (b) a top electrode assembly with a top electrode, the top electrode is disposed above both the inner and outer bottom electrodes, wherein the conductive ring is exposed to and faces toward the top electrode.