Patent ID: 7351987

Claim:
An irradiation system with ion beam which is configured so that a beam from a beam generation source is caused to pass through a mass analysis device and a beam transformer, then pass through a deflector for scanning which swings the beam reciprocally, a beam parallelizing device, an acceleration/deceleration device, and an energy filtering device, and then is incident on an irradiation target, a hybrid angular energy filter generating both electric and magnetic field to bend the beam swung with the deflector in a plane perpendicular to a beam scan plane provided as said energy filtering device, and a pair of multi-surface energy slit units each having a plurality of energy slits that are switchable therebetween depending on an ion species for irradiation are provided on a downstream side of said hybrid angular energy filter, wherein said irradiation target is irradiated with pure-energy high-current beams from low energy to high energy in a state where contamination such as neutral particles, different kinds of dopants, metal, and dust particles are in extremely small amounts.