Patent ID: 7625472

Claim:
A plasma-assisted sputter deposition system comprising: a reactor into which a process gas is introduced to be used for producing plasma, a doughnut-shaped electrode made of a material for sputtering by said plasma, wherein a lower surface of said doughnut-shaped electrode is angled to a surface of a wafer, a spinning plate that spins on its central axis while moving in a circular path with respect to the central axis of the doughnut-shaped electrode above the doughnut-shaped electrode, wherein said spinning plate contains a magnet arrangement attached to its lower surface and is parallel to the angled side surface of said doughnut-shaped electrode, a mechanism configured to have a motor connected to a central axis of said spinning plate, a ring-shaped guide member with gear mechanism fixed to a side wall of said reactor, and a connection member for connecting said motor and said ring-shaped guide member, for spinning said spinning plate on its central axis by the operation of said motor and moving said spinning plate above said doughnut-shaped electrode and along said ring-shaped guide member around the central axis of said doughnut-shaped electrode through said gear mechanism of said ring-shaped guide member by the operation of said motor, an electrical power source connected to said doughnut-shaped electrode, and a wafer holder for placing said wafer for film deposition, which is at rest during the film deposition.