Lithographic apparatus and method

Photocopying – Projection printing and copying cameras – Illumination systems or details

Reexamination Certificate

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Details

C355S053000

Reexamination Certificate

active

07834980

ABSTRACT:
A method of lithography is disclosed that includes conditioning a radiation beam using an illumination system of a lithographic apparatus, imparting the radiation beam with a pattern in its cross-section, and projecting the patterned beam of radiation as an exposure field onto a substrate, wherein a periodic interference pattern is present in the exposure field, and relative motion is established between the substrate and a component in the illumination system, such that the periodic interference pattern is displaced in a direction which is not parallel to a direction of repetition of the periodic interference pattern.

REFERENCES:
patent: 4970546 (1990-11-01), Suzuki et al.
patent: 5191374 (1993-03-01), Hazama et al.
patent: 5621499 (1997-04-01), Shiozawa
patent: 5684566 (1997-11-01), Stanton
patent: 6222615 (2001-04-01), Suzuki
patent: 6331885 (2001-12-01), Nishi

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