Particle-optical systems and arrangements and particle-optical components for such systems and arrangements
First Claim
1. A particle arrangement providing a primary beam path for a primary beam of charged particles to an object, and providing a secondary beam path for charged-particles extending from the object to a detector arrangement, the particle-optical arrangement comprising:
- at least one charged-particle source for generating at least one beam of charged particles, the primary beam path extending from the at least one charged-particle source to the object;
a first focusing lens providing a focusing magnetic field;
an objective lens; and
a beam splitter, wherein the beam splitter is disposed in the primary beam path between the at least one charged-particle source and the objective lens and in the secondary beam path between the objective lens and the detector arrangement;
wherein the objective lens provides a focusing magnetic field for the charged-particles of the primary beam and for the charged particles of the secondary beam; and
wherein the at least one charged-particle source is arranged within the magnetic field provided by the first focusing lens.
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Accused Products
Abstract
An electron-optical arrangement provides a primary beam path for a beam of primary electrons and a secondary beam path for secondary electrons. The electron-optical arrangement includes a magnet arrangement having first, second and third magnetic field regions. The first magnetic field region is traversed by the primary beam path and the secondary beam path. The second magnetic field region is arranged in the primary beam path upstream of the first magnetic field region and is not traversed by the secondary beam path. The first and second magnetic field regions deflect the primary beam path in substantially opposite directions. The third magnetic field region is arranged in the secondary beam path downstream of the first magnetic field region and is not traversed by the first beam path. The first and third magnetic field regions deflect the secondary beam path in a substantially same direction.
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Citations
23 Claims
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1. A particle arrangement providing a primary beam path for a primary beam of charged particles to an object, and providing a secondary beam path for charged-particles extending from the object to a detector arrangement, the particle-optical arrangement comprising:
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at least one charged-particle source for generating at least one beam of charged particles, the primary beam path extending from the at least one charged-particle source to the object; a first focusing lens providing a focusing magnetic field; an objective lens; and a beam splitter, wherein the beam splitter is disposed in the primary beam path between the at least one charged-particle source and the objective lens and in the secondary beam path between the objective lens and the detector arrangement; wherein the objective lens provides a focusing magnetic field for the charged-particles of the primary beam and for the charged particles of the secondary beam; and wherein the at least one charged-particle source is arranged within the magnetic field provided by the first focusing lens. - View Dependent Claims (2)
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3. A particle-optical arrangement, comprising:
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at least one charged-particle source for generating at least one beam of charged particles, at least one multi-aperture plate having a plurality of apertures formed in the plate, wherein the plurality of apertures is arranged in a first pattern, wherein a plurality of charged-particle beamlets is formed from the beam of charged particles downstream of the aperture plate; and a first focusing lens providing a magnetic field having a focusing field portion in a region between the charged-particle source and the multi-aperture plate; wherein the at least one charged-particle source is arranged within the magnetic field provided by the first focusing lens. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. A particle-optical arrangement, comprising:
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at least one charged-particle source for generating at least one beam of charged particles; at least one multi-aperture plate having a plurality of apertures formed in the plate, wherein a plurality of charged-particle beamlets is formed from the at least one beam of charged particles downstream of the aperture plate; a first focusing lens providing a focusing field throughout a first region adjacent to the multi-aperture plate in a direction of the at least one beam; and an energy changing electrode providing an electrical field for changing a kinetic energy of charged particles of the beam throughout a second region adjacent to the multi-aperture plate in the direction of the at least one beam, and wherein the first region of the focusing field and the second region of the electrical field overlap in an overlapping region. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A charged-particle beam manipulation method, the method comprising:
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generating at least one beam of charged particles with at least one charged-particle source; forming a plurality of charged-particle beamlets from the at least one beam of charged particles with at least one multi-aperture plate having a plurality of apertures formed in the plate; generating a magnetic field, wherein the at least one charged-particle source is positioned within the magnetic field; and focusing the at least one beam of charged particles with the magnetic field. - View Dependent Claims (19)
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20. A charged-particle beam manipulation method, the method comprising:
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generating at least one beam of charged particles, the particles forming a plurality of charged-particle beamlets from the at least one beam of charged particles with at least one multi-aperture plate having a plurality of apertures formed in the plate; providing a focusing field and a kinetic energy changing field overlapping the focusing field, wherein the kinetic energy changing field changes a kinetic energy of the at least one beam of charged particles upstream of the at least one multi-aperture plate. - View Dependent Claims (21)
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22. A charged-particle beam manipulation method, the method comprising:
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generating at least one beam of charged particles, the particles forming a plurality of charged-particle beamlets from the at least one beam of charged particles with at least one multi-aperture plate having a plurality of apertures formed in the plate; providing a focusing field and a kinetic energy changing field overlapping the focusing field, wherein the kinetic energy changing field changes a kinetic energy of the plurality of charged-particle beamlets downstream of the at least one multi-aperture plate. - View Dependent Claims (23)
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Specification