Patent ID: 7581511
Filing Date: 2009-09-01
Classification: C23C,H01J,H01L

Abstract:
1. A plasma unit for distributing a plasma in the manufacturing of microfeature devices, comprising: a window having an upper portion composed at least in part of a material through which a plasma energy can propagate and a lower portion extending downward directly from the first portion, wherein the lower portion is composed of a non-conductive material that is transmissive to the plasma energy, and wherein the lower portion has an exterior surface configured to face a workpiece holder directly below the window; a chamber configured to receive the plasma energy passing through the window, the chamber having a first inlet for receiving a first gas and a second inlet for receiving a second gas, and wherein the chamber comprises a central hub enclosed within the window and a plurality of conduits extending through the window from the hub; and a plurality of holes extending through the lower portion of the window from the conduits to the exterior surface, wherein the holes define outlets arranged to distribute the plasma formed within the plasma unit directly over a workpiece juxtaposed to the plasma unit.