Abstract:
PROBLEM TO BE SOLVED: To regenerate immersion fluid whose specified quality does not meet a specified threshold, and to make the regenerated immersion fluid recirculate. SOLUTION: A lithography apparatus includes a projection system, a fluid handling structure, a metrology device, and a recycle control device. The projection system projects a pattern projecting a radiation beam onto a target part of a substrate, and the substrate is supported on a substrate table. The fluid handling structure provides the immersion fluid to a space between the projection system and the substrate and/or the substrate table. The metrology device monitors a parameters of the immersion fluid. The recycle control device adjusts the routing of the immersion fluid so as to be reused or regenerated in the fluid handling structure, based on the quality of the immersion fluid indicated by the metrology device. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
A mask assembly suitable for use in a lithographic process, the mask assembly comprising a patterning device; and a pellicle frame configured to support a pellicle and mounted on the patterning device with a mount; wherein the mount is configured to suspend the pellicle frame relative to the patterning device such that there is a gap between the pellicle frame and the patterning device; and wherein the mount provides a releasably engageable attachment between the patterning device and the pellicle frame.
Abstract:
A mask assembly suitable for use in a lithographic process, the mask assembly comprising a patterning device; and a pellicle frame configured to support a pellicle and mounted on the patterning device with a mount; wherein the mount is configured to suspend the pellicle frame relative to the patterning device such that there is a gap between the pellicle frame and the patterning device; and wherein the mount provides a releasably engageable attachment between the patterning device and the pellicle frame.