摘要:
An illumination intensity adjustment device 10 comprises a plurality of blades 11 disposed in the projection beam PB so as to cast half-shadows extending across the illumination field IF. The blades can be selectively rotated to increase their width perpendicular to the projection beam PB to control uniformity.
摘要:
A lithographic projection apparatus contains a projection system for projecting a patterned beam onto a target portion of the substrate. The projection system contains one or more optically active mirrors (20) and heat shields (22,28,29) specifically located for intercepting heat radiation to or from the mirrors and/or their support structure (26). The heat shields are actively cooled and the mirrors and the heat shields and the mirrors are supported separately on a support frame to reduce vibration of the mirrors due to active cooling. The heat shields preferably include heat shields that intercept heat radiation to or from the support structure and/or respective heat shields for individual mirrors that intercept heat radiation to or from the mirrors.
摘要:
A lithographic projection apparatus contains a projection system for projecting a patterned beam onto a target portion of the substrate. The projection system contains one or more optically active mirrors (20) and heat shields (22,28,29) specifically located for intercepting heat radiation to or from the mirrors and/or their support structure (26). The heat shields are actively cooled and the mirrors and the heat shields and the mirrors are supported separately on a support frame (MF) to reduce vibration of the mirrors due to active cooling. The heat shields preferably include heat shields that intercept heat radiation to or from the support structure and/or respective heat shields for individual mirrors that intercept heat radiation to or from the mirrors.
摘要:
A lithographic projection apparatus is disclosed in which the space between the final element of the projection system and the substrate is filled with a liquid. An edge seal member 17, 117 at least partly surrounds the substrate W or other object on the substrate table WT to prevent catastrophic liquid loss when edge portions of the substrate or are imaged or illuminated.
摘要:
In a lithographic projection apparatus a liquid supply system maintains liquid in a space between the final element of the projection system and the substrate of the lithographic projection apparatus. A shutter member (150) is provided to take the place of the substrate in containing the liquid (11) in the liquid supply system during substrate exchange.
摘要:
In a lithographic apparatus, a reference grating 11 mounted on the wafer table WT is illuminated with a measurement beam 20 incident in a direction independent of wafer table tilt. The diffraction orders are detected by detector 30 and used to determine the lateral shift in the wafer table resulting from a non-zero Abbe arm, and hence the Abbe arm, for calibration purposes. The detector 30 may be a detector also used for off-axis alignment of the wafer and wafer table.
摘要:
A lithographic projection apparatus in which the projection system comprises a plurality of optical elements or sensors mounted on a frame. The frame is made of a glass ceramic material with a coefficient of thermal expansion of less than or approximately equal to 0.1 x 10 -6 K -1 thereby avoiding the need for expensive cooling systems and/or predictive temperature compensation.