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Proceedings Paper

Cleaning of photomask substrates using CO2 snow
Author(s): Werner V. Brandt
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Paper Abstract

CO2 snow cleaning technology has demonstrated the ability to clean a variety of contamination types in a non damaging, environmentally friendly manner. CO2 snow cleaning methods have been used to clean both particles and light organics and currently can be found in a variety of high tech industries to include, semiconductor (Si and GaAs), flat panel display, disk head and media manufacturing, and fiber optics. This paper offers an introduction to basic CO2 properties and cleaning methods in general and photomask cleaning in particular. Focus will be placed on the CO2 snow cleaning method to include: the snow making process, process parameters, process issues, contaminant types, CO2 sources and specification, and safety. A new CO2 snow system to clean current and next generation photomask substrates has been developed and is currently being tested. Machine specifics, process parameters, process issues, and cleaning data, will be discussed in detail.

Paper Details

Date Published: 11 March 2002
PDF: 9 pages
Proc. SPIE 4562, 21st Annual BACUS Symposium on Photomask Technology, (11 March 2002); doi: 10.1117/12.458340
Show Author Affiliations
Werner V. Brandt, Eco-Snow Systems Inc. (United States)

Published in SPIE Proceedings Vol. 4562:
21st Annual BACUS Symposium on Photomask Technology
Giang T. Dao; Brian J. Grenon, Editor(s)

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