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Proceedings Paper

EUV sources for the alpha-tools
Author(s): Joseph Pankert; Rolf Apetz; Klaus Bergmann; Marcel Damen; Günther Derra; Oliver Franken; Maurice Janssen; Jeroen Jonkers; Jürgen Klein; Helmar Kraus; Thomas Krücken; Andreas List; Micheal Loeken; Arnaud Mader; Christof Metzmacher; Willi Neff; Sven Probst; Ralph Prümmer; Oliver Rosier; Stefan Schwabe; Stefan Seiwert; Guido Siemons; Dominik Vaudrevange; Dirk Wagemann; Achim Weber; Oliver Zitzen
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Paper Abstract

In this paper, we report on the recent progress of the Philips Extreme UV source. The Philips source concept is based on a discharge plasma ignited in a Sn vapor plume that is ablated by a laser pulse. Using rotating electrodes covered with a regenerating tin surface, the problems of electrode erosion and power scaling are fundamentally solved. Most of the work of the past year has been dedicated to develop a lamp system which is operating very reliably and stable under full scanner remote control. Topics addressed were the development of the scanner interface, a dose control system, thermo-mechanical design, positional stability of the source, tin handling, and many more. The resulting EUV source-the Philips NovaTin(R) source-can operate at more than 10kW electrical input power and delivers 200W in-band EUV into 2π continuously. The source is very small, so nearly 100% of the EUV radiation can be collected within etendue limits. The lamp system is fully automated and can operate unattended under full scanner remote control. 500 Million shots of continuous operation without interruption have been realized, electrode lifetime is at least 2 Billion shots. Three sources are currently being prepared, two of them will be integrated into the first EUV Alpha Demonstration tools of ASML. The debris problem was reduced to a level which is well acceptable for scanner operation. First, a considerable reduction of the Sn emission of the source has been realized. The debris mitigation system is based on a two-step concept using a foil trap based stage and a chemical cleaning stage. Both steps were improved considerably. A collector lifetime of 1 Billion shots is achieved, after this operating time a cleaning would be applied. The cleaning step has been verified to work with tolerable Sn residues. From the experimental results, a total collector lifetime of more than 10 Billion shots can be expected.

Paper Details

Date Published: 23 March 2006
PDF: 9 pages
Proc. SPIE 6151, Emerging Lithographic Technologies X, 61510Q (23 March 2006); doi: 10.1117/12.657066
Show Author Affiliations
Joseph Pankert, Philips Extreme UV GmbH (Germany)
Rolf Apetz, Philips Extreme UV GmbH (Germany)
Klaus Bergmann, Fraunhofer Institut für Lasertechnik (Germany)
Marcel Damen, Philips Extreme UV GmbH (Germany)
Günther Derra, Philips Research Labs. (Germany)
Oliver Franken, Fraunhofer Institut für Lasertechnik (Germany)
Maurice Janssen, Philips Extreme UV GmbH (Germany)
Jeroen Jonkers, Philips Extreme UV GmbH (Germany)
Jürgen Klein, Fraunhofer Institut für Lasertechnik (Germany)
Helmar Kraus, Philips GmbH (Germany)
Thomas Krücken, Philips Research Labs. (Germany)
Andreas List, Philips Extreme UV GmbH (Germany)
Micheal Loeken, Philips Extreme UV GmbH (Germany)
Arnaud Mader, Fraunhofer Institut für Lasertechnik (Germany)
Christof Metzmacher, Philips Research Labs. (Germany)
Willi Neff, Fraunhofer Institut für Lasertechnik (Germany)
Sven Probst, Fraunhofer Institut für Lasertechnik (Germany)
Ralph Prümmer, Fraunhofer Institut für Lasertechnik (Germany)
Oliver Rosier, Fraunhofer Institut für Lasertechnik (Germany)
Stefan Schwabe, Philips Extreme UV GmbH (Germany)
Stefan Seiwert, Fraunhofer Institut für Lasertechnik (Germany)
Guido Siemons, Philips Extreme UV GmbH (Germany)
Dominik Vaudrevange, Philips Extreme UV GmbH (Germany)
Dirk Wagemann, Philips Extreme UV GmbH (Germany)
Achim Weber, Philips Research Labs. (Germany)
Oliver Zitzen, Philips Extreme UV GmbH (Germany)

Published in SPIE Proceedings Vol. 6151:
Emerging Lithographic Technologies X
Michael J. Lercel, Editor(s)

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