Method and apparatus for elimination of bubbles in immersion...

Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement

Reexamination Certificate

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C430S322000

Reexamination Certificate

active

07014966

ABSTRACT:
A method of operating an immersion lithography system, including steps of immersing at least a portion of a wafer to be exposed in an immersion medium, wherein the immersion medium comprises at least one bubble; directing an ultrasonic wave through at least a portion of the immersion medium to disrupt and/or dissipate the at least one bubble; and exposing the wafer with an exposure pattern by passing electromagnetic radiation through the immersion medium subsequent to the directing. Also disclosed is a monitoring and control system for an immersion lithography system.

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