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Journal of Micro/Nanolithography, MEMS, and MOEMS

Optical designs of grazing incidence collector for extreme ultraviolet lithography
Author(s): Fabio E. Zocchi; Enrico Benedetti
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Paper Abstract

Two designs of grazing incidence collectors for extreme ultraviolet (EUV) lithography are described as alternative solutions to the type-I Wolter configuration. The main purposes of the designs are the improvement of collection efficiency and the increase in flexibility with which the design can be adapted and adjusted to the boundary specifications set by the source and the illuminator. With reference to a specific scenario, examples of these designs and their performances are presented, discussed, and compared to what can be achieved with a Wolter collector. In this scenario, one of the designs offers the possibility to achieve large collection efficiency with a limited number of mirrors, as opposed to the Wolter case where high values of the collection efficiency are possible, provided the number of mirrors is increased.

Paper Details

Date Published: 1 October 2007
PDF: 7 pages
J. Micro/Nanolith. MEMS MOEMS 6(4) 043002 doi: 10.1117/1.2811949
Published in: Journal of Micro/Nanolithography, MEMS, and MOEMS Volume 6, Issue 4
Show Author Affiliations
Fabio E. Zocchi, Media Lario S.r.l. (Italy)
Enrico Benedetti, Media Lario S.r.l. (Italy)

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