Patent ID: 7544270
Filing Date: 2009-06-09
Classification: H01J,H01L

Abstract:
1. An apparatus adapted to process a substrate, the apparatus comprising: a plasma process chamber; a support element capable of supporting the substrate inside the plasma process chamber; at least one plasma control element being placed adjacent to a peripheral portion of the support element such that the plasma control element is capable of influencing a plasma inside the plasma process chamber if an electric field is applied thereto, wherein the plasma control element is movable inside the plasma process chamber such that it can be set to any of at least two different positions; and at least one voltage generator that is connected to the plasma control element, wherein the plasma control element comprises a piezo-electric element capable of modifying the geometric configuration of the plasma control element, wherein the piezo-electric element comprises a first piezo-electric foil disposed inside the plasma control element and a second piezo-electric foil disposed at the outside of the plasma control element.