发明申请
US20080284993A1 REDUCING CONTAMINATION IN IMMERSION LITHOGRAPHY 失效
减少沉积岩石中的污染

REDUCING CONTAMINATION IN IMMERSION LITHOGRAPHY
摘要:
A wafer chuck assembly includes a first chuck section configured to hold a semiconductor wafer on a support surface thereof, and a second chuck section removably attached to the first chuck section. The first chuck section has a gap therein, the gap located adjacent an outer edge of the wafer, and the gap containing a volume of immersion lithography fluid therein. A fluid circulation path is configured within the first chuck section so as to facilitate the radial outward movement of the immersion lithography fluid in the gap, thereby maintaining a meniscus of the immersion lithography fluid at a selected height with respect to a top surface of the semiconductor wafer.
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