Ion implanting method and apparatus
The ion implanting method uses both reciprocatively scanning an ion beam in an X direction and reciprocatively mechanically driving a substrate in a Y direction orthogonal thereto. An implanting step of implanting ions separately for two implanted regions with different dose amounts of the substrate is executed plural times by changing at the center of the substrate a driving speed of the substrate. A rotating step of rotating the substrate around its center by a prescribed angle is executed once during each of the intervals between the respective implanting steps and while the ion beam is not applied to the substrate.
1. An apparatus for implanting ions on a surface of a substrate, the apparatus comprising:
a scanning device for reciprocatively scanning an ion beam in an X direction and a Y direction orthogonal thereto by an electric field or a magnetic field;
a rotating device for rotating the substrate around a center of the substrate;
a control device for controlling one of the scanning device and the rotating device;
wherein the control device changes one of a scanning speed of the ion beam in the X direction and a scanning speed of the ion beam in the Y direction so that ion implantation is performed in order to separate for two implanted regions on the substrate with different dose amounts, the control device controls the rotating device to rotate the substrate around its center by a predetermined angle after the ion implantation while the ion beam is not applied to the substrate, and the control device control to repeat the ion implantation and the rotation.