Patent ID: 7462843

Claim:
Apparatus for implanting a target with ions, comprising: an ion source; extraction optics for extracting from the ion source an ion beam that projects with a slightly divergent angle from an ion beam axis; and a magnetic mass analyzer for guiding the ion beam along a trajectory according to a mass-to-charge ratio, wherein the magnetic mass analyzer comprises: an arcuate yoke encompassing a pathway for the ion beam; and a mirror symmetrical pair of saddle-shaped coils extending through the yoke along the ion beam pathway wherein each saddle-shaped coil comprises eight connected conductive segments in sequential series including; a first curved segment lying generally parallel to a curved segment of the beam axis, tangential to a midplane of the beam axis; a second curved segment bending about 90° degrees away from the midplane of the beam axis; a third curved segment of 180° arching across the beam axis; a fourth curved segment of about 90° angle lying generally parallel to the second segment; a fifth curved segment lying parallel to the curved beam axis segment and opposite to the first segment; a sixth segment bending 90° away from the midplane of the beam axis; a seventh segment arching back through 180° across the beam axis; and a eighth segment turning 90° and connecting to the first curved segment wherein the ion beam diverges to form a continuous ribbon beam having a longer dimension in a non-dispersive plane of the magnetic mass analyzer.