Patent ID: 11915904
Assignee: FEI COMPANY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A corrector system, the corrector system comprising:
an inner electrostatic multi pole formed by a plurality of electrodes, wherein a first electrode of the plurality of electrodes comprises:
a core composed of an electrically isolating material and having (i) an inner side orientable toward a beam path of a charged particle system and (ii) a lateral side adjacent to the inner side and not facing the beam path when the inner side is oriented toward the beam path, the lateral side separated by a distance (g) between a second electrode of the plurality of electrodes; and
a coating composed of an electrically conductive material that forms an outer layer of at least a portion of the first electrode, the portion including the inner side and a length (h) along the lateral side adjacent to the inner side, wherein the coating on the inner side is positioned between the core of the first electrode and a charged particle beam along the beam path when the corrector system is used in the charged particle system; and

an outer magnetic multi pole that surrounds the inner electrostatic multi pole.