Patent ID: 7137354

Claim:
A plasma immersion ion implantation reactor for ion implanting a species into a layer of a workpiece, comprising: an enclosure comprising a side wall and a ceiling and defining a chamber; a workpiece support pedestal within the chamber having a workpiece support surface facing said ceiling and defining a process region extending generally across said wafer support pedestal and confined laterally by said side wall and axially between said workpiece support pedestal and said ceiling; said enclosure having first and second pairs of openings, said first and second pairs being oriented transverse to one another, each pair of openings being separated from one another by a distance approximately equal to the diameter of said workpiece support, whereby the two openings of each pair are adjacent respective points along said side wall that are 180 degrees apart along the circumference of said side wall; first and second mutually transverse hollow conduits outside of said chamber, each conduit having first and second ends connected to respective openings of the corresponding pair of openings, so as to provide first and second mutually transverse reentrant paths extending through said conduit and across said process region and intersecting one another in said process region; gas distribution apparatus on or near an interior surface of said reactor for introducing a process gas containing the species to be ion implanted; first and second RF plasma source power applicators adjacent said first and second conduits, respectively.