Abstract:
The present invention relates to a projection lens assembly module for directing a multitude of charged particle beamlets onto an image plane located in a downstream direction, and a method for assembling such a projection lens assembly. In particular the present invention discloses a modular projection lens assembly with enhanced structural integrity and/or increased placement precision of its most downstream electrode.
Abstract:
A deceleration apparatus capable of decelerating a short spot beam or a tall. ribbon beam is disclosed. In either case, effects tending to degrade the shape of the beam profile are controlled. Caps to shield the ion beam from external potentials are provided. Electrodes whose position and potentials are adjustable are provided, on opposite sides of the beam, to ensure that the shape of the decelerating and deflecting electric fields does not significantly deviate from the optimum shape, even in the presence of the significant space-charge of high current low-energy beams of heavy ions.
Abstract:
A focused ion beam apparatus includes an ion gun unit having an emitter tip, a gas supply unit including an ion source gas nozzle configured to supply gas to the tip and an ion source gas supply source. An extracting electrode ionizes the gas adsorbed onto the surface of the tip and extracts ions by applying a voltage between the extracting electrode and the tip. A cathode electrode accelerates the ions toward a sample, and a gun alignment electrode positioned on the side of the sample with respect to the ion gun unit and adjusts the direction of irradiation of the ion beam ejected from the ion gun unit. A lens system includes a focusing lens electrode and an objective lens electrode to focus the ion beam onto the sample.
Abstract:
An apparatus for transmission of energy of an ion to at least one gas particle and/or for transportation of an ion and a particle beam device having an apparatus such as this are disclosed. In particular, a container is provided, in which a gas is arranged which has gas particles, wherein the container has a transport axis. Furthermore, at least one first multipole unit and at least one second multipole unit are provided, which are arranged along the transport axis. The first multipole unit and the second multipole unit are formed by printed circuit boards. Furthermore, an electronic circuit is provided, which provides each multipole unit with a potential, such that a potential gradient is generated, in particular along the transport axis.
Abstract:
An improved method of directing a charged particle beam that compensates for the time required for the charged particles to traverse the system by altering one or more of the deflector signals. According to one embodiment of the invention, a digital filter is applied to the scan pattern prior to digital-to-analog (D/A) conversion in order to reduce or eliminate over-shoot effects that can result from TOF errors. In other embodiments, analog filters or the use of signal amplifiers with a lower bandwidth can also be used to compensate for TOF errors. By altering the scan pattern, over-shoot effects can be significantly reduced or eliminated.
Abstract:
The present invention relates to a deflector of a micro-column electron beam apparatus and method for fabricating the same, which forms a seed metal layer and a mask layer on both sides of a substrate, and exposes some of the seed metal layer on which deflecting plates, wirings and pads are to be formed by lithography process using a predetermined mask. The wirings and pads are formed by plating metal on the exposed portion, and some of the metal layer is also exposed on which the deflecting plates are to be formed using a predetermined mask, and then the metal is plated with desired thickness, thereby the deflecting plates are completed. Therefore, by forming plurality of deflecting plates on both sides of the substrate at the same time through plating process, alignment between the deflecting plates formed on both sides of the substrate can be exactly made, and by fabricating a deflector integrated with the substrate and deflecting plates in a batch process, productivity and reproducibility is improved. In addition, since the deflecting plates, wirings and pads are directly formed on the substrate, structural safety is improved and thereby durability is also improved.
Abstract:
The present invention relates to a deflector of a micro-column electron beam apparatus and method for fabricating the same, which forms a seed metal layer and a mask layer on both sides of a substrate, and exposes some of the seed metal layer on which deflecting plates, wirings and pads are to be formed by lithography process using a predetermined mask. The wirings and pads are formed by plating metal on the exposed portion, and some of the metal layer is also exposed on which the deflecting plates are to be formed using a predetermined mask, and then the metal is plated with desired thickness, thereby the deflecting plates are completed. Therefore, by forming plurality of deflecting plates on both sides of the substrate at the same time through plating process, alignment between the deflecting plates formed on both sides of the substrate can be exactly made, and by fabricating a deflector integrated with the substrate and deflecting plates in a batch process, productivity and reproducibility is improved. In addition, since the deflecting plates, wirings and pads are directly formed on the substrate, structural safety is improved and thereby durability is also improved.
Abstract:
To provide an electron beam irradiation device capable of avoiding a problem of convergence of an electron beam at the maximum scanning points, and constantly obtaining an irradiated region of uniform energy density, an electron beam irradiation device comprising an electron beam source 12, an accelerating tube 13 for accelerating electrons emitted from said electron beam source, a focusing electromagnet 16 for applying a magnetic field to a high energy electron beam, which is formed by the accelerating tube, for controlling the beam diameter of the electron beam, and an electromagnet 17 for deflecting and scanning the beam-diameter-controlled electron beam by applying a magnetic field to the electron beam, wherein an electric current component IF which is synchronized with an electric current IS of the scanning electromagnet 17 is superimposed on an electric current IF of the focusing electromagnet 16, thereby controlling the electric current IF of the focusing electromagnet in a manner that said beam diameter becomes maximum at the maximum scanning points.