Patent ID: 8920888

Claim:
A method, comprising: supporting a wafer on a chuck in a plasma process chamber; generating a plasma in the plasma process chamber and performing a plasma process on the wafer using the generated plasma; rotating the chuck and the wafer supported thereon during the plasma process to reduce thickness non-uniformity of a film on the wafer, the film processed by the plasma process; and selectively controlling a plasma power in one or more controllable zones with respect to the wafer, the controllable zones of the one or more controllable zones comprising at least a first zone having a first radius with respect to a center of the wafer, a second zone excluding the first zone and having a second radius greater than the first radius with respect to the center of the wafer, and a third zone excluding the first zone and the second zone and having a third radius greater than the second radius with respect to the center of the wafer, wherein the controllable zones of the one or more controllable zones each have an individually controllable plasma power.