Patent ID: 8627783
Filing Date: 2014-01-14
Classification: H01J,Y10T

Abstract:
1. A combined pressure control/plasma confinement assembly configured for confining a plasma and for at least partially regulating pressure in a plasma processing chamber during plasma processing of a substrate, comprising: a movable plasma confinement structure having therein a plurality of perforations and configured to surround said plasma when deployed; and a movable pressure control structure disposed outside of said movable plasma confinement structure such that said movable plasma confinement structure is disposed between said plasma and said movable pressure control structure during said plasma processing, said movable pressure control structure being deployable and retractable along with said movable plasma confinement structure to facilitate handling of said substrate, said movable pressure control structure being independently movable relative to said movable plasma confinement structure to regulate said pressure by blocking at least a portion of said plurality of perforations.