Patent ID: 7482757
Filing Date: 2009-01-27
Classification: H01J

Abstract:
1. A high-density plasma source for forming a plasma within a plasma duct having an interior region, comprising: an annular insulating body including a cylindrical inner surface and a first central axis, with an annular cavity formed within said insulating body and having a second central axis that coincides with the first central axis; an inductor coil arranged within said annular cavity operable to generate a first magnetic field within the plasma duct interior region and inductively couple to the plasma; a plurality of spaced apart magnets arranged in at least one concentric magnet ring adjacent at least one of an upper and a lower surface of the annular insulating body; a grounded conductive housing surrounding said annular insulating body; and an electrostatic shield arranged adjacent an inner surface of the annular insulating body and grounded to said conductive housing.