Patent ID: 6139679
Filing Date: 2000-10-31
Classification: H01J

Abstract:
An apparatus for processing a workpiece, comprising:a chamber having a wall and an interior within said wall adapted to be evacuated to an internal pressure substantially below an external pressure external to said chamber wall, wherein said chamber wall defines an aperture;a workpiece support surface positioned within said chamber interior for supporting a workpiece;an RF coil comprising a continuous, 1-piece hollow conductive body having two ends positioned on the exterior of said chamber, two feedthrough portions passing through said chamber wall aperture and a central portion between said feedthrough portions positioned in said chamber interior, said RF coil being positioned to couple RF energy to maintain a plasma in said chamber for processing said workpiece; anda feedthrough assembly which includes an insulator member permanently attached to at least one of said feedthrough portions of said RF coil body and positioned adjacent said chamber wall aperture between said RF coil body and said chamber wall to insulate said RF coil body from said chamber wall.