摘要:
A projection system (PS) is provided which includes, in an embodiment, two frames. The optical elements of the projection system are mounted on a first frame (200). The position of the optical elements is measured relative to a second frame (300) using a first measurement system (910). A second measurement system (920) is used to measure a parameter associated with a deformation of the second frame. The measurement made by the second measurement system can be used to compensate for any errors in the position of the optical elements as measured by the first measurement system resulting from deformations of the second frame. Typically, deformations of the frames are due to resonant oscillation and thermal expansion. Having two frames enables the optical elements of the projection system to be positioned with a high degree of accuracy. Optionally, a temperature control system (780, 790) may be provided to drive the temperature of at least one of the frames back to a desired value after the lithographic apparatus has been taken off line.
摘要:
A projection system (PS) is provided which includes, in an embodiment, two frames. The optical elements of the projection system are mounted on a first frame (200). The position of the optical elements is measured relative to a second frame (300) using a first measurement system (910). A second measurement system (920) is used to measure a parameter associated with a deformation of the second frame. The measurement made by the second measurement system can be used to compensate for any errors in the position of the optical elements as measured by the first measurement system resulting from deformations of the second frame. Typically, deformations of the frames are due to resonant oscillation and thermal expansion. Having two frames enables the optical elements of the projection system to be positioned with a high degree of accuracy. Optionally, a temperature control system (780, 790) may be provided to drive the temperature of at least one of the frames back to a desired value after the lithographic apparatus has been taken off line.
摘要:
In an EUV (extreme ultraviolet) lithography apparatus, an illumination system includes a multifaceted field mirror and a multifaceted pupil mirror. A field facet mirror within mirror focuses EUV radiation onto a particular associated pupil facet mirror, from where it is directed to a target area. Each field facet mirror is modified to scatter unwanted DUV (deep ultraviolet) radiation into a range of directions. The majority of DUV falls onto neighboring pupil facet mirrors within the pupil mirrors, so that the amount of DUV radiation reaching target E is suppressed in comparison to the wanted EUV radiation. Because the distance between mirrors is much greater than the width of an individual pupil facet mirror, good DUV suppression can be achieved with only a narrow scattering angle. Absorption of EUV radiation in the scattering layer can be minimized.
摘要:
A lithographic apparatus includes a substrate table constructed to hold a substrate, a projection system configured to project a patterned radiation beam through an opening and onto a target portion of the substrate, and a conduit having an outlet in the opening. The conduit is configured to deliver gas to the opening. The lithographic apparatus further includes a cooling apparatus controlled by a control system. The cooling apparatus is configured to cool the gas such that gas which travels from the opening to the substrate has a predetermined temperature when the gas is incident upon the substrate.
摘要:
A lithographic apparatus includes a substrate table constructed to hold a substrate, a projection system configured to project a patterned radiation beam through an opening and onto a target portion of the substrate, and a conduit having an outlet in the opening. The conduit is configured to deliver gas to the opening. The lithographic apparatus further includes a cooling apparatus controlled by a control system. The cooling apparatus is configured to cool the gas such that gas which travels from the opening to the substrate has a predetermined temperature when the gas is incident upon the substrate.
摘要:
A lithographic apparatus includes a substrate table constructed to hold a substrate, a projection system configured to project a patterned radiation beam through an opening and onto a target portion of the substrate, and a conduit having an outlet in the opening. The conduit is configured to deliver gas to the opening. The lithographic apparatus further includes a cooling apparatus controlled by a control system. The cooling apparatus is configured to cool the gas such that gas which travels from the opening to the substrate has a predetermined temperature when the gas is incident upon the substrate.
摘要:
A lithographic apparatus includes a substrate table constructed to hold a substrate, a projection system configured to project a patterned radiation beam through an opening and onto a target portion of the substrate, and a conduit having an outlet in the opening. The conduit is configured to deliver gas to the opening. The lithographic apparatus further includes a cooling apparatus controlled by a control system. The cooling apparatus is configured to cool the gas such that gas which travels from the opening to the substrate has a predetermined temperature when the gas is incident upon the substrate.
摘要:
A lithographic apparatus configured to project a patterned radiation beam onto a target portion of a substrate held on a substrate holder in an indent on a substrate table, the apparatus includes a liquid supply system configured to at least partly fill a space between a projection system and the substrate with liquid; a barrier structure configured to substantially contain the liquid within the space; and a heat pipe supplied, in use, with a temperature conditioned fluid and configured to thermally condition the substrate and/or the substrate holder at locations where localized cooling is likely to occur.
摘要:
A lithographic apparatus is disclosed having a removable adhesive film carrying a coating on at least a part of the apparatus. In an embodiment, a liquid supply system having a liquid confinement structure extending along at least part of a boundary of a space between a projection system and a substrate support is disclosed, wherein the film carrying the coating is on at least part of the liquid confinement structure.
摘要:
In a lithographic apparatus, a part of a reflector is heated and cooled. The rate of heating and/or the rate of cooling is adjusted to adjust the temperature of the part. The change in temperature of the part exerts a force on the reflector, which changes its shape.