Lithographic apparatus and device manufacturing method

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device

Reexamination Certificate

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C430S005000, C355S067000, C355S077000, C378S034000

Reexamination Certificate

active

07405031

ABSTRACT:
A multi-optical-layer optical element of a lithographic projection apparatus in which at least one optical layer is comprised of an alloy of Mo and Cr. That layer may form the outer most layer of a Mo/Si layer system with an optional protective outer coating of Ru. Furthermore, the multi-optical-layer optical element may be comprised of a plurality of interposed between Mo/Cr alloyed layers.

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