Patent ID: 9136096
Filing Date: 2015-09-15
Classification: C23C,H01J

Abstract:
1. A plasma processing apparatus comprising: a process chamber; a platen positioned in the process chamber for supporting a workpiece; a source configured to generate a plasma in the process chamber having a plasma sheath proximate a front surface of the workpiece; an insulating plasma sheath modifier, having a gap, disposed between the plasma and the platen, such that a first surface of the insulating plasma sheath modifier is proximate the plasma and a second surface is closer to the platen, and configured to control a shape of a boundary between the plasma and the plasma sheath so a portion of the shape of the boundary is not parallel to a plane defined by a front surface of the workpiece facing the plasma; and a metal target, affixed to the second surface of the insulating plasma sheath modifier closer to the platen, wherein ions in the plasma are attracted across the boundary through the gap and strike the metal target at a plurality of incident angles.