Patent ID: 8920611

Claim:
A method of performing physical vapor deposition in a plasma reactor chamber in which source power at a frequency f s is applied through a first impedance match to a sputter target, and bias power at a frequency f b is applied through a second impedance match to a workpiece electrode underlying a workpiece, said method comprising: grounding said side wall and connecting a first multi-frequency impedance controller between ground and an element comprising one of said workpiece electrode and said sputter target; adjusting distribution of ion density across said element by adjusting impedance to ground at f s through said first multi-frequency impedance controller relative to the impedance to ground at the source power frequency f s through the side wall; suppressing at said element respective frequencies comprising at least an intermodulation product of f s and f b , by controlling in said first multi-frequency impedance controller respective filters corresponding to said respective frequencies; wherein said suppressing comprises providing in said first multi-frequency impedance controller respective filters connected to ground and tuned to respective frequencies corresponding to harmonics of f s , harmonics of f b and intermodulation products of f s and f b , and controlling said respective filters to suppress plural ones of said respective frequencies.