摘要:
A lithographic projection apparatus is provided. The apparatus includes a radiation system for providing a beam of radiation, and a support for supporting a patterning device. The patterning device serves to pattern the beam of radiation according to a desired pattern. The apparatus also includes a substrate table for holding a substrate, a projection system for projecting the patterned beam of radiation onto a target portion of the substrate, and a particle supply unit for supplying getter particles into the beam of radiation in order to act as a getter for contamination particles in the beam of radiation. The getter particles have a diameter of at least about 1 nm.
摘要:
A lithographic apparatus is arranged to project a beam from a radiation source onto a substrate. The apparatus includes an optical element in a path of the beam, a gas inlet for introducing a gas into the path of the beam so that the gas will be ionized by the beam to create electric fields toward the optical element, and a gas source coupled to the gas inlet for supplying the gas. The gas has a threshold of kinetic energy for sputtering the optical element that is greater than the kinetic energy developed by ions of the gas in the electric fields.
摘要:
A lithographic apparatus is disclosed. The apparatus includes an illumination system that provides a beam of radiation, and a support structure that supports a patterning structure. The patterning structure is configured to impart the beam of radiation with a pattern in its cross-section. The apparatus also includes a substrate support that supports a substrate, a projection system that projects the patterned beam onto a target portion of the substrate, and a debris-mitigation system that mitigates debris particles which are formed during use of at least a part of the lithographic apparatus. The debris-mitigation system is arranged to apply a magnetic field so that at least charged debris particles are mitigated.
摘要:
A system for detecting at least one contamination species in an interior space of a lithographic apparatus, including: at least one monitoring surface configured to be in contact with the interior space, a thermal controller configured to control the temperature of the monitoring surface to at least one detection temperature, and at least one detector configured to detect condensation of the at least one contamination species onto the monitoring surface.
摘要:
A multi-layer mirror includes a multi-layer stack. The multi-layer stack includes a plurality of alternating layers with a multi-layer stack top layer and a spectral filter top layer arranged on the multi-layer stack. The spectral filter top layer includes a first spectral purity enhancement layer that includes a first material m1 and has a first layer thickness d1, an intermediate layer that includes a second material m2 and has a second layer thickness d2. The intermediate layer is arranged on the multi-layer stack top layer. The first material is selected from SiN, Si3N4, SiO2, ZnS, Te, diamond, CsI, Se, SiC, amorphous carbon, MgF2, CaF2, TiO2, Ge, PbF2, ZrO2, BaTiO3, LiF or NaF. The second material includes a material different from the first material, and d1+d2 has a thickness between 1.5 and 40 nm.
摘要:
In a lithographic projection system, the radiation energy delivered to the substrate needs to be accurately controlled. Attenuation by injecting an absorbent gas into a volume through which the radiation passes is a convenient way to control the energy. Additionally, the interaction between gasses and the radiation may be used to measure the energy of the radiation with minimal disruption to the radiation.
摘要:
A lithographic apparatus includes an illumination system configured to provide a beam of radiation, a support configured to support a patterning device, a substrate table and a projection system. Furthermore, the lithographic apparatus includes a plurality of EUV sources for providing EUV radiation to the illumination system and a distributor which is arranged to convert the EUV radiation from each of the EUV sources into an intermediate beam of radiation. The intermediate beam of radiation is directed from the distributor in a first direction by a mirror surface. The distributor may include a rotationally driven mirror arrangement, the axis of rotation being non-parallel to the mirror surface.
摘要:
A lithographic projection apparatus for EUV lithography includes a foil trap, or channel barrier. The foil trap forms an open structure after the source to let the radiation pass unhindered. The foil trap is configured to be rotatable around an optical axis. By rotating the foil trap, an impulse transverse to the direction of propagation of the radiation can be transferred on debris present in the beam. This debris will not pass the foil trap. In this way, the amount of debris on the optical components downstream of the foil trap is reduced. The foil trap may be alternately rotated around the optical axis in a first direction and a second direction opposite the first direction.
摘要:
In a lithographic projection apparatus, a grating spectral filter is used to filter an EUV projection beam. The grating spectral filter is preferably a blazed, grazing incidence, reflective grating. Cooling channels may be provided in or on the rear of the grating spectral filter. The grating spectral filter may be formed of a material effectively invisible to the desired radiation.
摘要:
A system for detecting at least one contamination species in an interior space of a lithographic apparatus, including: at least one monitoring surface configured to be in contact with the interior space, a thermal controller configured to control the temperature of the monitoring surface to at least one detection temperature, and at least one detector configured to detect condensation of the at least one contamination species onto the monitoring surface.