Abstract:
A device is arranged to measure a quantity relating to radiation. The device includes a sensor configured to measure the quantity, a screen arranged to protect the sensor from incoming particles emitted from a source configured to emit extreme ultraviolet radiation, and a mirror configured to redirect extreme ultraviolet radiation emitted by the source, past the screen, to the sensor.
Abstract:
A debris mitigation system for trapping debris coming from a tin debris-generating radiation source is provided. The debris mitigating system includes a debris barrier comprising a plurality of foils, and a cleaning system constructed and arranged to clean the foils. The cleaning system includes a supply unit to provide a liquid alloy to the foils to dissolve and flush trapped debris from the foils. The alloy includes gallium, indium, tin, or any combination thereof.
Abstract:
A method for removal of a deposition on an uncapped multilayer mirror of an apparatus. The method includes providing a gas that includes one or more of H2, D2, and DH, and one or more additional compounds selected from hydrocarbon compounds and/or silane compounds in at least part of the apparatus; producing hydrogen and/or deuterium radicals and radicals of the one or more additional compounds, from the gas; and bringing the uncapped multilayer mirror with deposition into contact with at least part of the hydrogen and/or deuterium radicals and the radicals of the one or more additional compounds to remove at least part of the deposition.
Abstract:
A contact detection method (70) involves a navigation of a contact detection tube (20′) within an open space of an anatomical region (50) of a body. The contact detection tube includes a tubular wall (21) having an interior surface (23) defining a working channel (24), and an electrode (30) integrated in the tubular wall (21). The electrode (30) electrically connects the contact detection tube (20′) to an electrically conductive object (41, 52) (e.g., biological tissue or a medical instrument/tool) in physical contact with an exterior surface (22) of the tubular wall (21) and electrically isolates the working channel (24) from any electrical connection of the tube (20′) to the object (41, 52). The method (70) further involves a determination of a contact status of the contact detection tube (20′) between an open state (i.e., no physical contact) and a closed state (i.e., physical contact).
Abstract:
A collector assembly includes a first collector mirror for reflecting radiation from a radiation emission point, such as an extreme ultraviolet radiation emission point, to an intermediate focus from where the radiation is used in the lithography apparatus for device manufacture. A second collector mirror, forward of the radiation emission point, collects additional radiation, reflecting it back to a third mirror and from there to the intermediate focus. The mirrors may allow radiation to be collected with high efficiency and without increase in the etendue. The collector assembly may reduce or remove non-uniformity in the collected radiation, for instance arising from obscuration of collected radiation by a laser beam stop used to prevent laser excitation radiation from entering the lithographic apparatus.
Abstract:
A device is constructed and arranged to generate radiation by using an electrical discharge through a gaseous medium. The device includes a first electrode and a second electrode, and a liquid supply arranged to provide a liquid to a location in the device. The device is arranged to be electrically supplied with a voltage and to supply the voltage at least partially to the first electrode and the second electrode in order to allow the electrical discharge to be generated in an electrical field created by the voltage. The electrical discharge produces a radiating plasma. The device also includes a shield arranged between the discharge location and a conducting part connected to the first electrode and/or the second electrode.
Abstract:
A transmissive spectral purity filter is configured to transmit extreme ultraviolet radiation. The spectral purity filter includes a filter part having a plurality of apertures to transmit extreme ultraviolet radiation and to suppress transmission of a second type of radiation. The apertures may be manufactured in carrier material such as silicon by an anisotropic etching process and topped with a reflective layer such as Mo metal, Ru metal, TiN or RuO. A diffusion barrier layer such as silicon nitride Si3N4, or silicon dioxide SiO2 is provided between the metal and the semiconductor to prevent diffusion and silicidation of the metal at elevated temperatures. The diffusion barrier layer may also serve as a hydrogen-resistant layer on parts of the semiconductor which are not beneath the reflective layer, and/or enhance emissivity for removal of heat from the structure.
Abstract translation:透射光谱纯度滤光器被配置为透射极紫外辐射。 光谱纯度滤光器包括具有多个孔以便透射极紫外辐射并抑制第二类辐射的透射的滤光器部分。 孔可以通过各向异性蚀刻工艺在诸如硅的载体材料中制成,并且覆盖有诸如Mo金属,Ru金属,TiN或RuO的反射层。 在金属和半导体之间设置有诸如氮化硅Si 3 N 4或二氧化硅SiO 2的扩散阻挡层,以防止金属在升高的温度下扩散和硅化。 扩散阻挡层还可以在半导体的不在反射层下面的部分上用作耐氢层,和/或增加用于从结构去除热量的发射率。
Abstract:
An assembly including a radiation reflector and a contaminant barrier is disclosed. The contaminant barrier is arranged to receive radiation from a radiation source and to reflect that radiation towards the radiation reflector, and the radiation reflector is arranged to reflect the radiation, received from the contaminant barrier, back towards the contaminant barrier.
Abstract:
A radiation source having self-shading electrodes is disclosed. Debris originating from the electrodes is reduced. The path from the electrodes to the EUV optics is blocked by part of the electrodes themselves (termed self-shading). This may significantly reduce the amount of electrode-generated debris.
Abstract:
A radiation system for generating a beam of radiation that defines an optical axis is provided. The radiation system includes a plasma produced discharge source for generating EUV radiation. The discharge source includes a pair of electrodes constructed and arranged to be provided with a voltage difference, and a system for producing a plasma between the pair of electrodes so as to provide a discharge in the plasma between the electrodes. The radiation system also includes a debris catching shield for catching debris from the electrodes. The debris catching shield is constructed and arranged to shield the electrodes from a line of sight provided in a predetermined spherical angle relative the optical axis, and to provide an aperture to a central area between the electrodes in the line of sight.