Patent ID: 7078714

Claim:
An ion implanting apparatus for transporting and projecting, an ion beam which has been produced by an ion source and is shaped into a sheet with a width longer than a narrow side width of a substrate, while keeping the width relationship, the apparatus comprising: the ion source for producing the ion beam including desired ion species to be implanted into the substrate and being shaped into the sheet with the width relationship, the ion source having a plurality of filaments which are used for generating a plasma for the sheet-shaped ion beam and arranged in a width direction of the sheet-shaped ion beam; one or more filament power supplies capable of controlling filament currents flowing through the respective filaments of the ion source, independently of one another; a mass separating magnet for receiving the sheet-shaped ion beam generated by the ion source, and selectively deriving the desired ion species by bending the ion beam in a direction perpendicular to a sheet face thereof, the mass separating magnet having magnet poles which are disposed with an interval longer than the width of the ion beam; a separating slit for receiving the sheet-shaped ion beam which has been derived from the mass separating magnet and selectively making the desired ion species pass through by cooperating with the mass separating magnet; a substrate drive device having a holder for holding the substrate, and reciprocatedly driving the substrate on the holder in a direction intersecting with the sheet face of the ion beam within an irradiating area of the sheet-shaped ion beam which has passed through the separating slit; a lens for uniformizing a beam current density distribution in the width direction of the sheet-shaped ion beam; and a beam profile monitor being disposed at an upstream side or downstream side of the substrate on the holder and measuring the beam current density distribution in the width direction by receiving the sheet-shaped ion beam.