Patent ID: 7888652

Claim:
An ion implantation apparatus, in which an ion beam formed in a ribbon-shape having a larger dimension in an X direction than a dimension in a Y direction substantially orthogonal to the X direction is irradiated onto a target, the ion implantation apparatus comprising: first and second magnets provided on an upstream side of the target, facing each other in the Y direction across a center of a cross-section of a path for the ribbon-shaped ion beam, and crossing a traveling direction of the ribbon-shaped ion beam, wherein the first magnet has a first magnetic pole having a first polarity on an inlet side of the ion beam and a second magnetic pole having a second polarity opposite to the first polarity on an outlet side of the ion beam, the second magnet has a third magnetic pole having the second polarity on the inlet side of the ion beam and a fourth magnetic pole having the first polarity on the outlet side of the ion beam, and the first and second magnets generate magnetic fields in a direction so that an inward Lorentz force is applied to the ion beam between both the magnets, and the ion beam is narrowed in the Y direction.