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Proceedings Paper

Long-term laser durability testing of optical coatings and thin films for 157-nm lithography
Author(s): Vladimir Liberman; Mordechai Rothschild; Stephen T. Palmacci; N. N. Efremow Jr.; Jan H. C. Sedlacek; A. Grenville
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Paper Abstract

Long-term durability tests of optical thin films and thin films designed for attenuating phase shifters have been performed in a chamber, which stresses clean protocols to eliminate extraneous effects of surface contamination. Most anti-reflective coatings tend to degrade several percent in transmission within 1 MJ/cm2 total dose. Attenuating phase shifting materials usually show an increase in transmission during 6 kJ/cm2. In both types of films there are exceptions, indicating that there are no fundamental causes that would limit the performance of such films. A new phenomenon of laser-induced surface damage in calcium fluoride has been observed, and is being studied.

Paper Details

Date Published: 30 July 2002
PDF: 8 pages
Proc. SPIE 4691, Optical Microlithography XV, (30 July 2002); doi: 10.1117/12.474552
Show Author Affiliations
Vladimir Liberman, MIT Lincoln Lab. (United States)
Mordechai Rothschild, MIT Lincoln Lab. (United States)
Stephen T. Palmacci, MIT Lincoln Lab. (United States)
N. N. Efremow Jr., MIT Lincoln Lab. (United States)
Jan H. C. Sedlacek, MIT Lincoln Lab. (United States)
A. Grenville, Intel Corp. (United States)
International SEMATECH (United States)

Published in SPIE Proceedings Vol. 4691:
Optical Microlithography XV
Anthony Yen, Editor(s)

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