摘要:
An immersion lithographic apparatus has adaptations (23,27,28,29,30,31,32) to prevent or reduce bubble formation in one or more gaps (22) in the substrate table by preventing bubbles (24) escaping from the gap into the beam path and/or extracting bubbles that may form in the gap.
摘要:
In a lithographic projection apparatus a liquid supply system maintains liquid in a space between a final element of the projection system and the substrate with a liquid confinement system. The liquid supply system further comprises a de-mineralizing unit, a distillation unit and a UV radiating source for the purification of immersion liquid. Chemicals may be added to the immersion liquid for the inhibition of lifeform growth and components of the liquid supply system may be made of a material which is non-transparent to visible light such that growth of lifeforms is reduced.
摘要:
A method of operating a fluid confinement system (12) of an immersion lithographic apparatus is disclosed. The performance of the liquid confinement system is measured in several different ways. On the basis of the result of the measurement of performance, a signal indicating, for example, that a remedial action may need to be taken is generated.
摘要:
An immersion lithographic apparatus is provided with a barrier member which defines a space for containing liquid between the projection system and the substrate. In order to minimize the crossing of the edge of the substrate which is being imaged (which can lead to inclusion of bubbles in the immersion liquid), the cross-sectional area of the space in a plane parallel to the substrate is made as small as possible. The smallest theoretical size is the size of the target portion which is imaged by the projection system. In some embodiments the shape of the final element of the projection system is also changed to have a similar size and/or shape in a cross-section parallel to the substrate to that of the target portion.
摘要:
An immersion lithographic apparatus is provided with a barrier member which defines a space for containing liquid between the projection system and the substrate. In order to minimize the crossing of the edge of the substrate which is being imaged (which can lead to inclusion of bubbles in the immersion liquid), the cross-sectional area of the space in a plane parallel to the substrate is made as small as possible. The smallest theoretical size is the size of the target portion which is imaged by the projection system. In some embodiments the shape of the final element of the projection system is also changed to have a similar size and/or shape in a cross-section parallel to the substrate to that of the target portion.
摘要:
An immersion lithographic apparatus is disclosed which includes a liquid supply system having an inlet (24) configured to supply a liquid to a space between a projection system of the lithographic apparatus and a substrate and an outlet (26) configured to remove at least part of the liquid, the liquid supply system configured to rotate the inlet, the outlet, or both, about an axis substantially perpendicular to an exposure plane of the substrate (W).
摘要:
A lithographic projection apparatus is disclosed in which a liquid supply system (LSS) provides an immersion liquid between a final element of the projection system (PL) and the substrate (W). An active drying station (ADS) is provided for actively removing immersion liquid from the substrate (W) or other objects after immersion of the substrate.
摘要:
Liquid is supplied to a reservoir (10) between the final element of the projection system (PS) and the substrate by an inlet (21,22). An overflow removes the liquid above a given level. The overflow is arranged above the inlet and thus the liquid is constantly refreshed and the pressure in the liquid remains substantially constant.