Patent ID: 6855939
Filing Date: 2005-02-15
Classification: H01J

Abstract:
1. A particle beam system comprising: a particle source for emitting particles along a beam path; an objective lens defining a diffraction plane and being mounted on said beam path downstream of said particle source; a mirror corrector unit including an electrostatic mirror disposed on said beam path between said particle source and said objective lens; said mirror corrector unit further including a magnetic beam deflector disposed on said beam path so as to be disposed between said particle source and said electrostatic mirror and between said electrostatic mirror and said objective lens; and, said magnetic beam deflector being free of dispersion for each single passthrough of said particles and said magnetic beam deflector including a plurality of quadrupoles which are so determined that on the entire course of said beam path between a first-time exit from said magnetic beam deflector and said objective lens, a maximum of two planes occur conjugated to said diffraction plane of said objective lens.