Abstract:
In an electron spectrometer, electrons emanating from a source are collected and focused to a collimated stream by an electrostatic lens free of spherical aberration. The lens includes a pair of axially spaced concave grids approximating sections of concentric ellipsoids having a common focii and coaxial semi-major axes. The collimated electron stream is inducted into an electric radial cylindrical analyzer for focusing the electrons into radially dispersed lines on a position-sensitive detector with the radial dispersion being a function of their energies. The cylindrical analyzer section subtends an angle of approximately 63.5.degree.. The grid openings in the grids of the electrostatic collimating lens are elongated in a direction transverse to the stream of the electrons passing therethrough and parallel to the radial electric field lines at the entrance to the electric analyzer to reduce the dispersive effect of the grids.
Abstract:
An ion implantation system in which surfaces of ion flight tube and drift tube perpendicular to ion dispersion plane have geometric configuration which precludes sputtering of contaminants onto path through resolving slit.
Abstract:
For dark-field imaging of the specimen, a scanning corpuscular-beam micrope is equipped with multiple annular apertures located between the beam source and the specimen on the one hand and between the specimen and the detector on the other hand. The areas of the multiple annular apertures conjointly i.e. complementarily cover the ray path. The aperture situated in front of the detector is surrounded by a wide, radiation-transmitting region. The invention affords utilizing for the generation of the image not only the rays scattered outside of the aperture cone but also a large part of the rays scattered within this cone.
Abstract:
An electron microscope in which the image forming lens system is employed as an energy analyzer. During beam energy analysis, an electron beam which passes through a slit positioned along the optical axis adjacent an objective lens is deflected so as to strike an intermediate lens off-axially by a deflecting means provided between said slit and said intermediate lens whereby the beam is dispersed by field (off-axis) chromatic aberration of the intermediate lens.
Abstract:
In an electron microscope transmitted electrons are detected according to whether they are unscattered, elastically scattered or inelastically scattered by the specimen. The elastically scattered electrons are further separated according to the magnitude of the scattering. Signals from the separate detectors can be used separately or combined as desired to enhance the information obtained from a specimen.
Abstract:
A semiconductor wafer includes a first surface and an implantation area adjacent to the first surface and a certain distance away from the first surface, the implantation area including implanted particles and defects. A defect concentration in the implantation area deviates by less than 5% from a maximum defect concentration in the implantation area.
Abstract:
An energy filter assembly (1, 100, 200, 300) for ion implantation system is provided comprising an energy filter (25), a first filter frame (40), and at least one coupling element (50). The energy filter (25) has at least one filter element (25a) absorbing the beam energy of an ion beam (10). The at least one coupling element (50) elastically connects the first filter frame (40) with the energy filter (25).