Abstract:
The invention relates to an apparatus and a method for production of a device for thermally induced field emission of particles for particle optical devices such as in particular electron or ion microscopes,having at least one particle emitter (3) arranged in or pointing into a vacuum space (2) with at least one field emitter tip (4) for the emission of the particles,and having a magnetic field generator (6) attributed to the particle emitter (3) for focussing of the emitted particle beam (5),with the particle emitter (3) with its field emitter tip (4) is built by emitter structures (9) positioned on the surface (7) of a substrate (8) which is turned away from the magnetic field generator (6),and the substrate (8) formed as separating wall between vacuum space (2) and the atmospheric space (10) situated outside the vacuum space (2) at the side (14) of the substrate (8) which is turned away from the emitter structures (9).
Abstract:
A lens apparatus in which a beam of charged particles of low accelerating voltage is brought to a focus by a magnetic field, the lens being situated behind the target position. The lens comprises an electrically-conducting coil arranged around the axis of the beam and a magnetic pole piece extending along the axis of the beam at least within the space surrounded by the coil. The lens apparatus comprises the sole focusing lens for high-resolution imaging in a low-voltage scanning electron microscope.
Abstract:
An objective lens in an electron microscope is adapted to detection of Auger electrons. Using an additional lens field, preferably including the use of a VAIL lens, the electrons to be detected are spiraled to a selection space. Between the lens field and the selection space a preferably displaceable, magnetic diaphragm is arranged for the separation of lens fields.
Abstract:
Apparatus having a generator of a beam of charged particles and magnetic focusing means in which a beam of charged particles is brought to a focus between the source and the focusing means so that radiation from a target placed at the focus can be received by a radiation detector within a substantial solid angle, bounded by said magnetic focusing means and the beam of charged particles. Preferably the focusing means is an electrically conducting coil of substantially flat or shallow conical form having a conical half-angle of not less than 75*.
Abstract:
The invention relates to a device and method for producing a device for the thermally induced field emission of particles for particle-optical devices such as electron or ion microscopes. The device comprises at least one particle emitter (3), which is arranged in a vacuum space (2) or is pointing thereto and has at least one field emitter tip (4) for the emission of particles, and a magnetic field generator (6) allocated to the at least one particle emitter (3) for focussing the emitted particle stream (5). According to the invention, the particle emitter (3) with its field emitter tip (4) is composed of emitter structures (9) which are produced on or in the surface (7) of the side of a substrate (8), facing away from the magnetic field generator (6). The substrate (8) is configured as a dividing wall (2) between the vacuum space (2) and the atmospheric space (10) which is located outside the vacuum space (2). The magnetic field generator (6) is arranged outside the vacuum space (2) on the side (14) of the substrate (8) facing away from the emitter structures (9).
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Herstellung einer Vorrichtung zur thermisch induzierten Feldemission von Teilchen für teilchenoptische Geräte wie insbesondere Elektronen- oder Ionenmikroskope, mit wenigstens einem in einem Vakuumraum (2) angeordneten bzw. in einen Vakuumraum (2) zeigenden Teilchenemitter (3) mit wenigstens einer Feldemitterspitze (4) zur Emission der Teilchen, und einer dem wenigstens einen Teilchenemitter (3) zugeordneten Magnetfelderzeuger (6) zur Fokussierung des emittierten Teilchenstroms (5), wobei der Teilchenemitter (3) mit seiner Feldemitterspitze (4) durch auf bzw. in der Oberfläche (7) auf der dem Magnetfelderzeuger (6) abgewandten Seite eines Substrates (8) gefertigte Emitterstrukturen (9) ausgebildet ist, und das Substrat (8) als Trennwandung zwischen dem Vakuumraum (2) und dem außerhalb des Vakuumraumes (2) liegenden Atmosphärenraum (10) ausgebildet ist, und der Magnetfelderzeuger (6) außerhalb des Vakuumraums (2) auf der den Emitterstrukturen (9) abgewandten Seite (14) des Substrates (8) angeordnet ist.
Abstract:
PROBLEM TO BE SOLVED: To provide an optical converging system for a charged particle beam which is a low-cost, has high-precision, and has high-resolution.SOLUTION: A beam orbit is limited in a ring zone shape to form distribution of an electromagnetic field converging toward a center direction of a beam orbit axis. Consequently, nonlinear action that is augmented outside, typified by spherical aberration of an electron lens, can be cancelled. Specifically, when an electrode is disposed on the axis and voltage is applied to the electrode, concentration of electric field occurs readily. In a case of magnetic field, if a coil, radially distributed and wound on a surface in an equiangular manner divided in a rotating direction, is formed, the concentration of magnetic flux density can be controlled.