Mr. Wilbert Staring Profile

Wilbert Staring

Business development at TNO

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Proceedings Article | 28 September 2017 Paper

Latest developments on EUV reticle and pellicle research and technology at TNO

Rogier Verberk, Norbert Koster, Edwin te Sligte, Wilbert Staring

Proceedings Volume 10446, 1044603 (2017) https://doi.org/10.1117/12.2279672

KEYWORDS: Reticles, Extreme ultraviolet, Inspection, Pellicles, EUV optics, Particles, Optical coherence tomography, Photomasks, Optics manufacturing, Contamination control

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At TNO an extensive EUV optics life time program has been running for over 15 years together with our partners ASML and Carl Zeiss. This has contributed to the upcoming introduction of EUV High Volume Manufacturing (HVM). To further help the industry with the introduction of EUV, TNO has worked on extending their facilities with a number of reticle and pellicle research infrastructure facilities. In this paper we will show some of the facilities that are available at TNO and shortly introduce their capabilities. Recently we have opened our EBL2 facility, which is an EUV Beam Line (EBL2) meant for studying the effects of high power EUV illumination on optics, reticles and pellicles up to the power roadmap of 500 W at intermediate Focus (IF). This facility is open to users from all over the world and is beneficial for the industry in helping developing alternative capping layers and contamination control strategies for optics lifetime, new absorber materials, pellicles and resists. The EBL2 system has seen first light in December 2016 and is now in the final stage of acceptance testing and qualification. It is expected that the system will be fully operational in the third quarter of 2017, and available for users. It is possible to transfer reticles to and from the EBL2 by means of the reticle handler using the dual pod interface. This secures backside cleanliness to NXE standards and thus enables wafer printing on a NXE tool in a later stage after the exposures and inspection at EBL2. Besides EBL2, a high performance and ultra-clean reticle handler is available at TNO. This handler incorporates our particle scanner Rapid Nano 4 for front side inspection of reticle blanks with a detection limit down to 20 nm particles. Attached to the handler is also an Optical Coherence Tomography (OCT) inspection tool for back-side reticle or pellicle inspection with a resolution down to 1 micron.

Proceedings Article | 8 October 2014 Paper

A new mask exposure and analysis facility

Edwin te Sligte, Norbert Koster, Alex Deutz, Wilbert Staring

Proceedings Volume 9235, 92351F (2014) https://doi.org/10.1117/12.2083713

KEYWORDS: Extreme ultraviolet lithography, Reticles, Extreme ultraviolet, Photomasks, Electron beam lithography, Pellicles, Analytical research, Scanners, Contamination control, Statistical analysis

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The introduction of ever higher source powers in EUV systems causes increased risks for contamination and degradation of EUV masks and pellicles. Appropriate testing can help to inventory and mitigate these risks. To this end, we propose EBL2: a laboratory EUV exposure system capable of operating at high EUV powers and intensities, and capable of exposing and analyzing EUV masks. The proposed system architecture is similar to the EBL system which has been operated jointly by TNO and Carl Zeiss SMT since 2005. EBL2 contains an EUV Beam Line, in which samples can be exposed to EUV irradiation in a controlled environment. Attached to this Beam Line is an XPS system, which can be reached from the Beam Line via an in-vacuum transfer system. This enables surface analysis of exposed masks without breaking vacuum. Automated handling with dual pods is foreseen so that exposed EUV masks will still be usable in EUV lithography tools to assess the imaging impact of the exposure. Compared to the existing system, large improvements in EUV power, intensity, reliability, and flexibility are proposed. Also, in-situ measurements by e.g. ellipsometry is foreseen for real time monitoring of the sample condition. The system shall be equipped with additional ports for EUVR or other analysis tools. This unique facility will be open for external customers and other research groups.

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