Abstract:
The present invention relates to a charged particle system comprising: a charged particle source; a first multi aperture plate; a second multi aperture plate disposed downstream of the first multi aperture plate, the second multi aperture plate; a controller configured to selectively apply at least first and second voltage differences between the first and second multi aperture plates; wherein the charged particle source and the first and second multi aperture plates are arranged such that each of a plurality of charged particle beamlets traverses an aperture pair, said aperture pair comprising one aperture of the first multi aperture plate and one aperture of the second multi aperture plate, wherein plural aperture pairs are arranged such that a center of the aperture of the first multi aperture plate is, when seen in a direction of incidence of the charged particle beamlet traversing the aperture of the first multi aperture plate, displaced relative to a center of the aperture of the second multi aperture plate. The invention further pertains to a a particle-optical component configured to change a divergence of a set of charged particle beamlets and a charged particle inspection method comprising inspection of an object using different numbers of charged particle beamlets.
Abstract:
A charged particle beam writing method includes irradiating a shot of a charged particle beam, and deflecting the charged particle beam of the shot using a plurality of deflectors arranged on an optical path of the charged particle beam to write a pattern on a target object, wherein any one of the plurality of deflectors controls deflection of a charged particle beam of a shot different from a shot which is controlled in deflection by another deflector in the same period.
Abstract:
A system, method, and apparatus for mitigating contamination associated with ion implantation are provided. An ion source, end station, and mass analyzer positioned between the ion source and the end station are provided, wherein an ion beam is formed from the ion source and selectively travels through the mass analyzer to the end station, based on a position of a beam stop assembly. The beam stop assembly selectively prevents the ion beam from entering and/or exiting the mass analyzer, therein minimizing contamination associated with an unstable ion source during transition periods such as a start-up of the ion implantation system.
Abstract:
The present invention relates to a particle-optical component comprising a first multi-aperture plate, and a second multi-aperture plate forming a gap between them; wherein a plurality of apertures of the first multi-aperture plate is arranged such that each aperture of the plurality of apertures of the first multi-aperture plate is aligned with a corresponding aperture of a plurality of apertures of the second multi-aperture plate; and wherein the gap has a first width at a first location and a second width at a second location and wherein the second width is by at least 5% greater than the first width. In addition, the present invention pertains to charged particle systems and arrangements comprising such components and methods of manufacturing multi aperture plates having a curved surface.
Abstract:
A chamber for exposing a workpiece to charged particles includes a charged particle source for generating a stream of charged particles, a collimator configured to collimate and direct the stream of charged particles from the charged particle source along an axis, a beam digitizer downstream of the collimator configured to create a digital beam including groups of at least one charged particle by adjusting longitudinal spacing between the charged particles along the axis, a deflector downstream of the beam digitizer including a series of deflection stages disposed longitudinally along the axis to deflect the digital beams, and a workpiece stage downstream of the deflector configured to hold the workpiece.
Abstract:
A chamber for exposing a workpiece to charged particles includes a charged particle source for generating a stream of charged particles, a collimator configured to collimate and direct the stream of charged particles from the charged particle source along an axis, a beam digitizer downstream of the collimator configured to create a digital beam including groups of at least one charged particle by adjusting longitudinal spacing between the charged particles along the axis, a deflector downstream of the beam digitizer including a series of deflection stages disposed longitudinally along the axis to deflect the digital beams, and a workpiece stage downstream of the deflector configured to hold the workpiece.
Abstract:
A multi-beam pattern definition device for use in a particle-beam processing or inspection apparatus, which is set up to be irradiated with a beam of electrically charged particles and allow passage of the beam through a plurality of apertures thus forming beamlets, which are imaged onto a target. A deflection array has a plurality of electrostatic deflector electrodes for each beamlet. Each deflector electrode can be applied an electrostatic potential individually. Counter electrodes are electrically connected to a counter potential independently of the deflection array through a counter-electrode array. The counter potentials may be a common ground potential or individual potentials in order to improve system reliability. In conjunction with an associated counter electrode, each deflector electrode deflects its beamlet sufficiently to deflect the beamlet off its nominal path when applied an activating voltage against the respective counter electrode.
Abstract:
A beam line before incidence on a beam scanner is arranged with an injector flag Faraday cup that detects a beam current by measuring a total beam amount of an ion beam to be able to be brought in and out thereto and therefrom. When the ion beam is shut off by placing the injector flag Faraday cup on a beam trajectory line, the ion beam impinges on graphite provided at the injector flag Faraday cup. At this occasion, even when the graphite is sputtered by the ion beam, since the injector flag Faraday cup is arranged on an upstream side of the beam scanner and the ion beam is shut off by the injector flag Faraday cup, particles of the sputtered graphite do not adhere to a peripheral member of the injector flag Faraday cup.
Abstract:
An ion implantation apparatus according to the invention includes a park electrode as a deflecting apparatus arranged at a section of a beam line from an outlet of a mass analysis magnet apparatus to a front side of a mass analysis slit for deflecting an ion beam in a predetermined direction of being deviated from a beam trajectory line by an operation of an electric field. When the ion beam does not satisfy a desired condition, a park voltage is applied to the park electrode, thereby, the ion beam is brought into an evacuated state by being deflected from the beam trajectory line. As a result, the ion beam cannot pass through the mass analysis slit, and therefore, the ion beam which does not arrive at a wafer to prevent the ion beam which does not satisfy the condition from being irradiated to the wafer.
Abstract:
A deflector which deflects a charged particle beam includes a substrate having an opening through which the charged particle beam should pass, and a deflection electrode which is arranged in the opening to deflect the charged particle beam and has a first conductive member and second conductive member which are formed by plating. The second conductive member is formed on a surface of the first conductive member and is essentially made of a material that is more difficult to oxidize than the first conductive member.