Patent ID: 8653490

Claim:
An ion implanter which emits an ion beam from an ion source and in which an ion implanting is performed to a substrate disposed in a process chamber, wherein the ion beam has a positive charge and a substantially rectangular cross section or a substantially long ellipsoidal cross section having a long side direction and a short side direction, the ion implanter comprising: a beam current measuring device that measures a beam current density distribution of the ion beam in the long side direction; a deflecting electrode that deflects at least a part of the ion beam in the long side direction toward the short side direction, based on a result measured by the beam current measuring device; and a shield member that partially shields the ion beam deflected by the deflecting electrode, wherein the deflecting electrode includes a plate electrode and an electrode group including a plurality of electrodes, the electrode group being disposed to face the plate electrode so as to interpose the ion beam between the plate electrode and the electrode group, the plate electrode being positioned along a long side direction that defines the cross section of the ion beam, and the electrode group being positioned along the long side direction of the ion beam, wherein the plurality of electrodes of the electrode group are commonly positioned on a same long side direction of the ion beam, opposite the long side direction where the plate electrode is positioned, the plate electrode is electrically grounded, the plurality of electrodes are electrically independent from each other, and each of the plurality of electrodes is connected to an independent power source from other power sources to perform a potential setting.