Patent ID: 9184029
Filing Date: 2015-11-10
Classification: H01J

Abstract:
1. A method of modulating a pressure in-situ in a plasma processing volume of a chamber, the plasma processing volume defined between a surface of a top electrode, a supporting surface of a substrate support and an outer region defined by a plasma confinement structure, the plasma confinement structure including at least one outlet port, the method comprising: injecting at least one processing gas into the plasma processing volume; providing RF power from at least one RF source coupled to the plasma processing volume; forming a plasma within the plasma processing volume using the RF power and the at least one processing gas; and modulating a pressure of the plasma processing volume; modulating the RF power provided by the at least one RF source, the modulating of the pressure and the RF power being synchronized to each other during a period of time when the plasma is formed in the plasma processing volume, wherein the modulating of the pressure and the RF power being synchronized to each other defines a pulsed state of the RF power and a pulsed state of the pressure, the modulating of the pressure being controlled by at least one of,