Abstract:
A three dimensional atom probe comprising a sharp specimen (10) coupled to a mounting means (12) where emission of charged particles is caused by application of a potential to the specimen tip (10) such that charged particles are influenced by filtering electrodes (206, 204) before impingement on a detection screen (202).
Abstract:
Ion implantation systems and beamline assemblies therefor are provided, in which multi-cusped magnetic fields are provided in a beamguide and the beamguide is energized to provide microwave electric fields in a traveling wave along the beamguide passageway. The magnetic and electric fields interact to provide an electron-cyclotron resonance condition for beam containment in the beamguide passageway.
Abstract:
A system for further increasing an inspection speed or a throughput in an SEM-system inspection device. An inspection device which inspects the surface of a substrate adjusts an electron beam produced from an electron source (26.6) by a primary optical system (26.1) to apply it to a substrate with a desired sectional shape. The electron beam is adjusted so as to keep an unevenness in electron beam illuminance to up to 10%. Electrons emitted from a sample are detected by a detector (26.4).
Abstract:
The invention relates to an electron/ion gun for electron or ion beams, comprising a beam source and a monochromator. According to the invention, said monochromator is equipped with an additional beam guidance system and a switchover element which conveys the particles coming from the beam source to either the monochromator or the rest of the beam guidance system is provided at the input of the monochromator.
Abstract:
Incorporating the use of a permanent magnet (252) within a GCIB apparatus to separate undesirable monomer ions from a gas cluster ion beam (148) to facilitate improved processing of workpieces (152). In an alternate embodiment, the effect of the permanent magnet may be controlled by the use of an electrical coil. The above system eliminates problems related to power consumption and heat generation.
Abstract:
Apparatus for acting upon charged particles has particular application in a mass analysis apparatus. An array of elongate magnetic poles (311) extends longitudinally in the direction of a longitudinal axis (350) of the array, the array having a symmetrical reference surface (320) containing the longitudinal axis and passing through the array with magnetic poles (311) on each side of the reference surface. Charged particles (314) enter into, or originate in, the field of the magnetic pole array at a position spaced from the said longitudinal axis (350). The array of magnetic poles is such as to provide between opposed poles (311A, 311B), an extended region of magnetic field in which the charged magnetic particles pass with a curved motion imposed thereon by the field, together with entry and exit regions (312A and 312B) which provide curved magnetic fields (312A, 312B), giving focusing or divergence of the beam of charged particles passing through the fringe field at an angle to the normal to the entry or exit region. The apparatus includes resolving means (332) for selecting a required species of particle from the beam by parameter dependent dispersion in a plane transverse to the reference surface (320), by focusing of the beam of particles at different focal points (331) along the general direction of propagation of the beam (314).
Abstract:
The invention relates to a Wien filter provided with electrodes for generating an electric field, and magnetic poles for generating a magnetic field, said electrodes and magnetic poles being positioned around and having a finite length along a filter axis, and being positioned around the filter axis such that electric and magnetic forces induced by the respective fields and exerted on an electrically charged particle moving substantially along the fileter axis at a certain velocity, take substantially an opposite direction to one another and are directed substantially perpendicular to the particle's direction of movement through the filter, said filter having along its axis two ends determined by the finite length of the electrodes and magnetic poles, and said ends both being terminated by a closing plate which is positioned substantially transversely to the filter axis and is provided with an aperture around the filter axis to allow the particle to enter into an exit from the filter. The closing plates are made from a material of low electric and magnetic resistance, and the distance from the closing plates to a plane halfway along and perpendicular to the filter axis is at most approximately equal to the shortest distance from the filter axis to the electrodes and/or magnetic poles.
Abstract:
An electron microscope comprises an energy-selective filter (10) which is arranged ahead of the high-voltage field in the electron gun (2). Because the filter carries high-voltage potential and is arranged within the gun space (14) which is filled with SF6 gas, problems arise regarding electrical and mechanical passages to the filter. Notably the centering of the filter is problematic. In order to enable suitable aperture adjustment of the filter nevertheless (for current limitation and for avoiding optical aberrations introduced into the beam by the filter), there is provided an entrance diaphragm (30) which is rigidly connected to the filter parts, notably to a pole face or to a field-defining closing piece (48a) of the filter.
Abstract:
A mass-analysed ion beam generator in which the ion beam is in the form of a thin flat ribbon with its major transverse dimension aligned parallel with the direction of the mass-analysing magnetic field.