Patent ID: 6402885
Filing Date: 2002-06-11
Classification: H01J

Abstract:
A plasma reactor comprising:a chamber enclosure having a process gas inlet and including a ceiling, a sidewall and a workpiece support pedestal capable of supporting a workpiece at a plasma processing location facing the ceiling, said workpiece processing location and ceiling defining a process region therebetween, said pedestal being spaced from said sidewall to define a pumping annulus therebetween having inner and outer walls, to permit process gas to be evacuated therethrough from the process region; a pair of opposing plasma confinement magnetic poles arranged adjacent said annulus within one of said inner and outer walls of said annulus, the opposing magnetic poles being axially displaced from one another said opposite poles being oriented to provide maximum magnetic flux in a direction across said annulus and a magnetic flux at said processing location less than the magnetic flux across said annulus.