Patent ID: 8993980
Filing Date: 2015-03-31
Classification: H01J

Abstract:
1. An ion beam scanner, comprising: a first scanner stage having a first opening to transmit an ion beam received from a mass resolving slit in a ribbon beam mode and in a spot beam mode, wherein in the spot beam mode the first scanner stage is configured to generate, responsive to a first oscillating deflection signal, a first oscillating deflecting field within the first opening, wherein the mass resolving slit forms a focal point of a ribbon beam in the ribbon beam mode; a second scanner stage disposed downstream of the first scanner stage and having a second opening to transmit the ion beam in the ribbon beam mode and in the spot beam mode, wherein in the spot beam mode the second scanner stage is configured to generate, responsive to a second oscillating deflection signal, a second oscillating deflecting field within the second opening that is opposite in direction to the first oscillating deflecting field; a collimator disposed downstream of the second scanner stage; and a scan controller to synchronize the first oscillating deflection signal and second oscillating deflection signal to generate a plurality of ion trajectories when the scanned ion beam exits the second stage that define a common focal point, wherein in the spot beam mode, the common focal point is sufficiently close to the mass resolving slit such that the ion beam scanner may be operated in the spot beam mode and the ribbon beam mode without reconfiguration of the collimator.