Prof. Gerrit Kroesen Profile

Prof. Gerrit Kroesen

Professor at University of Technology Eindhoven

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Proceedings Article | 23 March 2020 Paper

Particle contamination control by application of plasma

Job Beckers, Boy van Minderhout, Paul Blom, Gerrit Kroesen, Ton Peijnenburg

Proceedings Volume 11323, 113232L (2020) https://doi.org/10.1117/12.2560192

KEYWORDS: Particles, Plasma, Contamination control, Extreme ultraviolet, Extreme ultraviolet lithography, Contamination, Scanners, Particle contamination, Electrons, Electrodes

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With the introduction of Extreme Ultraviolet (EUV) lithography, the control of contamination has become crucial. Sources for contamination in EUV lithography scanners are not limited to only particle generation and release inside the scanner environment but may be introduced from outside as well, e.g. through translational and/or rotational (robotic) feedthroughs.

In this contribution we highlight our joint (TU/e and VDL ETG) research efforts aimed at the development of plasma-enabled contamination control strategies. The focus in this research is on airborne particles immersed in a low pressure gas flow that interact with both the afterglow of a plasma and an externally applied electric field.

A flexible experimental setup has been developed and will be introduced which is able to study the interaction between contaminants, plasmas and externally applied electric fields. Our results show that the designed configuration allows to carefully control the residual charges of the particles as well as their positions and trajectories with respect to the gas flow in which they are immersed. These results, together with the understanding of the underlying principle processes, open-up various possibilities to achieve improved cleanliness of the mentioned systems.

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