摘要:
A lithographic projection apparatus is provided with an electrostatic chuck. The electrostatic chuck includes a dielectric element which has a plurality of pins formed on a first surface. The item to be clamped is clamped in position on the chuck by applying a potential difference between an electrode located on the surface of the dielectric member opposite to the clamping surface and an electrode located on the clamping surface of the item to be clamped. The pins are provided with at least an upper conducting layer, which serves to reduce the Johnsen-Rahbek effect, allowing the substrate to be released more quickly.
摘要:
A substrate holder has burls having a height not less than 100 μm and at least 10 vacuum ports arranged within a central region extending to a radius of two thirds the radius of the substrate. Thereby concave wafers can be reliably clamped by generating an initial vacuum in a central region which exerts a clamping force tending to flatten the wafer and allowing the initial vacuum to deepen until the wafer is fully clamped.
摘要:
A lithographic apparatus includes an illumination system for providing a beam of radiation and an article support for supporting an article to be placed in a beam path of the beam of radiation on the article support. The article support has a plurality of supporting protrusions. The plurality of protrusions define a support zone for providing a flat plane of support. A backfill gas feed is arranged in the support zone for providing a backfill gas flow to a backside of the article when supported by the article support, for providing an improved thermal conduction between the article and the article support. According to one aspect of the invention, the support zone is surrounded by a boundary zone having a reduced height relative to the plane of support so that the backfill gas flow is not bounded to the support zone.
摘要:
A lithographic projection apparatus and device manufacturing method is disclosed in which a space between a projection system and an object on a substrate table, is at least partly filled with a liquid. A sensor is positioned to be illuminated by a beam of radiation once it has passed through the liquid. An edge seal member may be provided to at least partly surround an edge of the sensor and to provide a primary surface facing the projection system substantially co-planar with a primary surface of the sensor.
摘要:
A table for a lithographic apparatus, the table having an encoder plate located on the table, a gap between the encoder plate and a top surface of the table, the gap located radially inward of the encoder plate relative to the periphery of the table, and a fluid extraction system with an opening in the surface of the gap to extract liquid from the gap.
摘要:
A lithographic apparatus may include an optical element, such as an immersion fluid reservoir, which supported at least in part by a bearing, such as a gas bearing. To enable illumination by the lithographic apparatus of an edge of the substrate, a surrounding structure is provided that surrounds the substrate. A level parameter of the substrate, such as a thickness of the substrate, is measured by a sensor, such as a thickness sensor. By means of an actuator, the substrate table on which the substrate is or will be held is positioned with respect to the surrounding structure, such that a surface of the substrate would be on a substantially same level as a surface of the surrounding structure, thus enabling the optical element to transition from the surface of the substrate to the surface of the surrounding structure and vice versa.
摘要:
An exposure apparatus including a liquid supply system configured to provide a liquid to a space between the projection system and an object, and a movable table having a recess, the recess including therein the object or a surface to hold and support the object, wherein a gap opening into which the liquid can enter is defined between a peripheral wall of the recess and the object, and the recess further including a fluid opening, below the gap opening, to remove the liquid entering the gap opening.
摘要:
A support structure for supporting an exchangeable object in a lithographic exposure apparatus includes a first support structure part and a second support structure part, the first support structure part being arranged to support the object, and the second support structure part being arranged to, at least in part, support the first support structure part. At least one of the first support structure part and the second support structure part has an open-box structure. The first support structure part and the second support structure part are configured to be attached to one another in such a way that the first support structure part and the second support structure together form a closed-box structure.
摘要:
The present invention relates to a clamping device configured to clamp an object (20, 120) on a support (1, 101). The clamping device comprises: a first device configured to force the object and the support away from each other using a first force, and a second device configured to force the object and the support towards each other using a second force. The first device and second device are configured to simultaneously exert the first force and the second force respectively to shape the object to a desired shape before completing the clamping of the object on the support.
摘要:
A lithographic apparatus with a cover plate formed separately from a substrate table and means for stabilizing a temperature of the substrate table by controlling the temperature of the cover plate is disclosed. A lithographic apparatus with thermal insulation provided between a cover plate and a substrate table so that the cover plate acts as a thermal shield for the substrate table is disclosed. A lithographic apparatus comprising means to determine a substrate table distortion and improve position control of a substrate by reference to the substrate table distortion is disclosed.