Patent ID: 6143129
Filing Date: 2000-11-07
Classification: H01J,Y10S

Abstract:
A plasma reactor for processing a substrate comprising:a chamber including a plasma producing region for producing a plasma having charged particles and an activated neutral species;a substrate processing region for processing a substrate at a distance from the plasma producing region;wherein the pressure in the plasma processing region is substantially the same as the pressure in the substrate processing region;a first source of radio frequency power;an induction coil adjacent to the plasma producing region of the chamber, the induction coil coupled to the first source of radio frequency power to inductively couple power into the plasma from the first source of radio frequency power;a conductive material adjacent to a flow path between the plasma producing region and the substrate producing region, the conductive material comprising a first conductive ring substantially surrounding the flow path and a second conductive ring substantially surrounding the flow path, the second conductive ring spaced apart from the first conductive ring;wherein the first conductive ring is grounded and an electrical potential is applied to the second conductive ring; anda second power source for inducing an electric field within the chamber such that charged particles are deflected from the flow path to the conductive material for filtration;wherein the average energy of the charged particles in a direction substantially perpendicular to the substrate is maintained at a substantially lower level than the average energy of the charged particles in a direction substantially parallel to the substrate.