Patent ID: 9287098
Filing Date: 2016-03-15
CPC Classification: C23C,H01J,H05H

Claim Text:
1. A pulsed DC power supply system configured to provide pulsed DC voltage between an anode and a cathode of a plasma processing chamber, the pulsed DC voltage including a first power delivery period of positive voltage separated from a second power delivery period by a charge removal period comprising a charge removal voltage having a negative polarity for removing charge from the cathode, the pulsed DC power supply system comprising: a DC power supply coupled to and providing power to a first and second rail; a switching circuit coupled to the first and second rails and switched so as to convert the power on the first and second rails to the pulsed DC voltage, where positive voltage is referenced from the anode to the cathode; a voltage-boosting circuit coupled between the first and second rails and comprising: a charge removal bias circuit coupled to the output of the voltage multiplier and providing the charge removal voltage to the switching circuit.