Patent ID: 6335536
Filing Date: 2002-01-01
Classification: H01J

Abstract:
A pulsed plasma doping system for implanting ions in a target, the system comprising:a vacuum chamber to contain an ionizable gas; an anode coupled to a reference voltage, the anode disposed within the vacuum chamber; a plasma source cathode disposed within the vacuum chamber; a first high voltage pulse source to provide an ignition voltage pulse Vplas, having a first amplitude, to the plasma source cathode; an implantation cathode to support the target; and an implantation voltage pulse source to supply an implantation voltage pulse Vimp, having a second amplitude, to the implantation cathode; wherein the implantation voltage pulse Vimp and the ignition voltage pulse Vplas are in a timed relationship to one another and have one or more different parameters, and a control device setting the first amplitude greater than the second amplitude.