Patent ID: 8502160

Claim:
A beam control assembly to shape a ribbon beam of ions for ion implantation, the beam control assembly comprising: a first bar; a first coil disposed on the first bar, wherein the first coil is the only coil disposed on the first bar, and wherein the first coil includes windings of electrical wire; a second bar disposed opposite the first bar with a gap defined between the first bar and second bar, wherein the ribbon beam travels between the gap; a second coil disposed on the second bar, wherein the second coil is the only coil disposed on the second bar, wherein the second coil includes windings of electrical wire, wherein the ribbon beam has a beam width and travels in a beam direction, wherein a first dimension corresponds to the beam width and a second dimension corresponds to the beam direction of the ribbon beam, wherein the first dimension corresponds to the longitudinal axis of the first and second bars, wherein the first coil is fixed to a first position in the first dimension on the first bar, and wherein the second coil is fixed to a second position in the first dimension on the second bar, and wherein the first and second positions are different; a third bar adjacent to the first bar; a third coil disposed on the third bar, wherein the third coil is the only coil disposed on the third bar, wherein the third coil includes windings of electrical wire; a fourth bar adjacent to the second bar; a fourth coil disposed on the fourth bar, wherein the fourth coil is the only coil disposed on the fourth bar, wherein the fourth coil includes windings of electrical wire; a first electrical power supply connected to the first coil without being electrically connected to any other coil; a second electrical power supply connected to the second coil without being electrically connected to any other coil; a third electrical power supply connected to the third coil without being electrically connected to any other coil; and a fourth electrical power supply connected to the fourth coil without being electrically connected to any other coil.