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Proceedings Paper

Performance of a 1.35NA ArF immersion lithography system for 40-nm applications
Author(s): Jos de Klerk; Christian Wagner; Richard Droste; Leon Levasier; Louis Jorritsma; Eelco van Setten; Hans Kattouw; Jowan Jacobs; Tilmann Heil
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Paper Abstract

Water based immersion lithography is now widely recognized a key enabler for continued device shrinks beyond the limits of classical dry lithography. Since 2004, ASML has shipped multiple TWINSCAN immersion systems to IC manufacturers, which have facilitated immersion process integration and optimization. In early 2006, ASML commenced shipment of the first immersion systems for 45nm volume production, featuring an innovative in-line catadioptric lens with a numerical aperture (NA) of 1.2 and a high transmission polarized illumination system. A natural extension of this technology, the XT:1900Gi supports the continued drive for device shrinks that the semiconductor industry demands by offering 40nm half-pitch resolution. This tool features a projection lens based on the already proven in-line catadioptric lens concept but with an enhanced, industry leading NA of 1.35. In this paper, we will discuss the immersion technology challenges and solutions, and present performance data for this latest dual wafer stage TWINSCAN immersion system.

Paper Details

Date Published: 27 March 2007
PDF: 14 pages
Proc. SPIE 6520, Optical Microlithography XX, 65201Y (27 March 2007); doi: 10.1117/12.712094
Show Author Affiliations
Jos de Klerk, ASML Netherlands B.V. (Netherlands)
Christian Wagner, ASML Netherlands B.V. (Netherlands)
Richard Droste, ASML Netherlands B.V. (Netherlands)
Leon Levasier, ASML Netherlands B.V. (Netherlands)
Louis Jorritsma, ASML Netherlands B.V. (Netherlands)
Eelco van Setten, ASML Netherlands B.V. (Netherlands)
Hans Kattouw, ASML Netherlands B.V. (Netherlands)
Jowan Jacobs, ASML Netherlands B.V. (Netherlands)
Tilmann Heil, Carl Zeiss SMT AG (Germany)

Published in SPIE Proceedings Vol. 6520:
Optical Microlithography XX
Donis G. Flagello, Editor(s)

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