摘要:
The present invention relates to a charged particle unit for deflecting and energy-selecting charged particles of a charged particle beam. Thereby, a double-focusing sector unit for deflecting and focusing the charged particle beam and an energy-filter forming a potential is provided, whereby charged particles of the charged particles beam are redirected at the potential-saddle depending on the energy of the charged articles.
摘要:
The present invention relates to a charged particle unit for deflecting and energy-selecting charged particles of a charged particle beam. Thereby, a double-focusing sector unit for deflecting and focusing the charged particle beam and an energy-filter forming a potential is provided, whereby charged particles of the charged particles beam are redirected at the potential-saddle depending on the energy of the charged articles.
摘要:
An electron beam device comprises: a beam emitter for emitting a primary electron beam; an objective electron lens for focusing the primary electron beam onto a specimen, the objective lens defining an optical axis; a beam separator having a first dispersion for separating a signal electron beam from the primary electron beam; and a dispersion compensation element. The dispersion compensation element has a second dispersion, the dispersion compensation element being adapted for adjusting the second dispersion independently of an inclination angle of the primary beam downstream of the dispersion compensation element, such that the second dispersion substantially compensates the first dispersion. The dispersion compensation element is arranged upstream, along the primary electron beam, of the beam separator.
摘要:
An achromatic beam separator device for separating a primary charged particle beam from another charged particle beam and providing the primary charged particle beam on an optical axis (142) is provided, including a primary charged particle beam inlet (134), a primary charged particle beam outlet (132) encompassing the optical axis, a magnetic deflection element (163) adapted to generate a magnetic field, and an electrostatic deflection element (165) adapted to generate an electric field overlapping the magnetic field, wherein at least one element chosen from the electrostatic deflection element and the magnetic deflection element is positioned and/or positionable to compensate an octopole influence.
摘要:
A secondary charged particle detection device for detection of a signal beam is described. The device includes a detector arrangement having at least two detection elements with active detection areas, wherein the active detection areas are separated by a gap (G), a particle optics configured for separating the signal beam into a first portion of the signal beam and into at least one second portion of the signal beam, and configured for focusing the first portion of the signal beam and the at least one second portion of the signal beam. The particle optics includes an aperture plate and at least a first inner aperture openings in the aperture plate, and at least one second radially outer aperture opening in the aperture plate, wherein the aperture plate is configured to be biased to one potential surrounding the first inner aperture opening and the at least one outer aperture opening.
摘要:
A lens system for a plurality of charged particle beams comprises a lens body with a first pole piece, a second pole piece and a plurality of lens openings for the respective charged particle beams; a common excitation coil arranged around the plurality of lens openings for providing a respective first magnetic flux to the lens openings; and a compensation coil arranged between the lens openings for providing a respective second magnetic flux to at least some of the lens openings so as to compensate for an asymmetry of the first magnetic flux.
摘要:
The present invention relates to an analyzing system with improved detection scheme and a charged particle beam device comprising the same. The analyzing system for analyzing a beam of charged particles has a divider to divide the beam of charged particles according to their energies into a low energy beam and a high energy beam; a front detector for detecting the high energy beam; and at least one reverse detector for detecting the low energy beam. The divider is positioned between the front detector and the at least one reverse detector and the front detector and/or the at least one reverse detector are segmented.
摘要:
A charged particle beam device is provided. The device includes an emitter for emitting a charged particle beam in a propagation direction essentially along an optical axis of the charged particle beam device, an aperture arrangement within the charged particle beam device. The aperture arrangement includes a first aperture element having a recess of the first aperture element, the first aperture element being movable in a first direction and with respect to the optical axis, a second aperture element having a recess of the second aperture element, the second aperture element being movable in essentially the first direction and with respect to the optical axis, a holder for holding the first aperture element and the second aperture element, a motion element adapted to move the first aperture element and the second aperture element with respect to the optical axis, and wherein the first aperture element and the second aperture element are displaced with respect to each other along the propagation direction, wherein the first aperture element and the second aperture element are movable in the first direction such that the recess of the first aperture element and the recess of the second aperture element form an aperture opening of a variable size.
摘要:
The invention relates to a charged particle beam device and a method for inspecting a specimen, comprising a source for generating a charged particle beam, an objective lens with an optical axis for focussing said charged particle beam on a specimen, which consists of a magnetic lens and a superimposed electrostatic lens having at least two electrodes, deflection means for deflecting said charged particle beam on said specimen and detector means for detecting charged particles released at said specimen. The invention is further characterized by control means co-acting with said deflection means and one of the electrodes of the electrostatic lens for applying a dynamic voltage to said electrode, the amount of the voltage being dependent on the distance of said charged particle beam from said optical axis at the specimen, in order to increase the efficiency of detecting said charged particles released at image areas being located on the specimen with distance from the optical axis.
摘要:
A secondary charged particle detection device for detection of a signal beam is described. The device includes a detector arrangement having at least two detection elements with active detection areas, wherein the active detection areas are separated by a gap (G), a particle optics configured for separating the signal beam into a first portion of the signal beam and into at least one second portion of the signal beam, and configured for focusing the first portion of the signal beam and the at least one second portion of the signal beam. The particle optics includes an aperture plate and at least a first inner aperture openings in the aperture plate, and at least one second radially outer aperture opening in the aperture plate, wherein the first aperture opening has a concave shaped portion, particularly wherein the first aperture opening has a pincushion shape.