Patent ID: 6494986
Filing Date: 2002-12-17
Classification: H01J

Abstract:
A plasma reactor for processing a workpiece, said plasma reactor comprising:an enclosure; a workpiece support within the enclosure facing an overlying portion of the enclosure, said workpiece support and the overlying portion of said enclosure defining a process region therebetween extending generally across the diameter of said wafer support; said enclosure having at least first and second openings therethrough near generally opposite sides of said workpiece support; at least one hollow conduit outside of said process region and connected to said first and second openings, providing a first torroidal path extending through said conduit and across said process region; a first coil antenna adapted to accept RF power, and inductively coupled to the interior of said hollow conduit and capable of maintaining a plasma in said torroidal path; at least third and fourth openings therethrough near generally opposite sides of said workpiece support and disposed along an axis transverse to an axis of said first and second openings extending therebetween; a second hollow conduit generally transverse to said one hollow conduit and disposed outside of said process region and connected to said third and fourth openings, whereby to provide a second closed torroidal path, said second torroidal path extending outside of said process region through said second conduit and extending across said process region between said third and fourth openings in a direction transverse to said first torroidal path.