Patent ID: 8217350
Filing Date: 2012-07-10
Classification: H01J

Abstract:
1. A particle optical arrangement, comprising: an electron microscopy system for emitting a primary electron beam directed to an object to be examined along a principal axis of the electron microscopy system, and an ion beam processing system for emitting an ion beam directed to the object to be examined along a principal axis of the ion beam processing system, wherein the principal axis of the electron microscopy system and the principal axis of the ion beam processing system are oriented relative to each other such that they enclose an angle, wherein the electron microscopy system comprises an objective lens comprising, for focussing the electron beam, a magnetic lens and an electrostatic lens and comprising an annular electrode traversed by the principal axis of the electron microscopy system, wherein the annular electrode is the component of the electron microscopy system arranged closest to a position of the object to be examined, wherein a shielding electrode is arranged between the annular electrode and the principal axis of the ion beam processing system, and wherein the shielding electrode comprises a conical sleeve with a truncation surface defining a front face facing the position of the object to be examined which front face extends transversely to a mathematical surface orthogonal to the principal axis of the ion beam processing system.