Patent ID: 11888311
Assignee: ADVANCED ENERGY INDUSTRIES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 16:
17. A method of providing pulsed power to a plasma processing chamber, the method comprising:
providing a snubber circuit coupled to a switching circuit, the snubber circuit configured to be coupled between a DC power supply and the switching circuit, and the switching circuit configured to be coupled between the snubber circuit and the plasma processing chamber, the snubber circuit comprising two switches whose duty cycle is configured to control a voltage across a capacitor of the snubber circuit and thereby to regulate a DC voltage provided at an output of the switching circuit to the plasma processing chamber;
accessing from memory, for the switching circuit, a target boost voltage, target pulsed output duty cycle, target pulsed output frequency, and target output current;
setting a duty cycle of the two switches to achieve the target boost voltage at the output of the switching circuit; and
delivering a first pulsed DC voltage to an electrode in the plasma processing chamber.