Patent ID: 8314561
Filing Date: 2012-11-20
Classification: H01J,H03F

Abstract:
1. A multi-channel radio frequency (RF) generator module comprising: N power amplifiers that generate N RF outputs, respectively; M drivers that drive the N power amplifiers based on M driver control signals, respectively; a power supply module that receives alternating current (AC) input power and that applies L rail voltages to the N power amplifiers based on L rail voltage setpoints, respectively; a control module that sets the L rail voltage setpoints and the M driver control signals, wherein the N RF outputs are provided to N respective plasma electrodes of a plasma chamber, and wherein N is an integer greater than one, L and M are integers greater than zero, and M and L are less than or equal to N; a parameter determination module that determines N actual forward powers for the N RF outputs, respectively; and a feedback module that determines a total forward power of the multi-channel RF generator module based on the N actual forward powers, wherein the control module sets the L rail voltage setpoints based on the total forward power.