Abstract:
A particle-optical apparatus is disclosed which combines the functions of an energy selector 27 and a beam splitter 21. The particle-optical apparatus is used in an electron microscopy system and serves to separate and superimpose, respectively, beam paths of a primary electron beam 11 and a secondary electron beam 13.
Abstract:
A probe-forming electron microscopy system 1 (SEM) is proposed which comprises a position-sensitive detector 15. As a result, position-dependent secondary electron intensities in the object plane 7 or angle-dependent secondary electron intensities in the object plane 7 may be observed.
Abstract:
A particle-optical apparatus is proposed which comprises a particle-optical lens for deflecting a plurality of separate beam-charged particles which is provided by a plurality of finger electrodes provided along an opening of the lens.
Abstract:
A method for the electron-microscopic observation of a semiconductor arrangement is provided. It includes providing an electron microscopy optics for imaging secondary electrons emanating from the semiconductor arrangement within an extended object field on a position-sensitive detector, providing an illumination device for emitting a primary energy beam, directing the primary energy beam to at least the object field for extracting there secondary electrons from the semiconductor arrangement. The semiconductor arrangement comprises a region with an upper surface provided by a first material and a recess with a high aspect ratio which is surrounded by the upper surface and has a bottom provided by a second material.
Abstract:
An apparatus and a method to manipulate at least one beam of charged particles are provided. The apparatus comprises two rows of field source members 13 which are disposed periodically at a distance from each other such that there exist planes of symmetry S, Snull with respect to which the field source members 13 are symmetrically disposed. The field has a component which is displaceable in the x-direction. To provide such field, a pattern of source strengths according to the formula F1(x)nullFm(x)nullFc(x) is applied to the field source members, wherein Fm is a component which is substantially independent of the displacement x0 and Fc is a correction component which is dependent on x0.
Abstract:
A particle-optical apparatus is provided for directing a beam of charged particles on an object plane or to image the object plane with the beam onto an image plane or intermediate image plane. The apparatus comprises a stack of lens assemblies which are disposed in beam direction at a fixed distances spaced apart from which other and are controllable for providing successively adjustable deflection fields for a beam traversing the stack. Each lens assembly provides at least one field source member for a magnetic or electric field. In particular, two rows of a plurality of field source members per lens assembly can be provided.
Abstract:
An electron microscopy system comprises an objective lens (19) which images a field displaceable in x-direction on a fixed beam axis (17). The objective lens has an astigmatic effect which is compensated for by a beam shaper (63) on the fixed axis. Furthermore, lens configurations can selectively act on the primary electron beam or the secondary electron beam.