Patent ID: 6541776
Filing Date: 2003-04-01
Classification: H01J

Abstract:
A device for electrostatic deflection of a particle beam out of a primary beam direction for the purpose of scanning a plane spanned by two coordinates X, Y, the device comprising:multiple electrodes which are configured as deflection wires extending in a Z direction orthogonal to the scanned plane, and the deflection wires are connected such that they form a plurality of deflection grids each having more than one deflection wire; an activation circuit which is connected to the deflection wires and acts upon the deflection wires by modifying deflection voltages which are an equivalent for the deflection of the particle beam out of the primary beam direction in the direction of coordinate X and coordinate Y; and a deflection voltage of the same magnitude is applied to all the deflection wires belonging to the same deflection grid.