Impact of design-parameters on the optical performance of a high-power adaptive mirror
| Autor: | Erwin John Van Zwet, Teun C. van den Dool, Jeroen A. Smeltink, David Nijkerk, Wouter D. Koek, Gregor van Baars |
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| Rok vydání: | 2017 |
| Předmět: |
business.industry
Computer science Extreme ultraviolet lithography 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Noise (electronics) Deformable mirror 010309 optics Optics Extreme ultraviolet 0103 physical sciences Process window Sensitivity (control systems) 0210 nano-technology business Actuator Adaptive optics Lithography Beam (structure) |
| Zdroj: | High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VI. |
| ISSN: | 0277-786X |
| Popis: | TNO is developing a High Power Adaptive Mirror (HPAM) to be used in the CO2 laser beam path of an Extreme Ultra- Violet (EUV) light source for next-generation lithography. In this paper we report on a developed methodology, and the necessary simulation tools, to assess the performance and associated sensitivities of this deformable mirror. Our analyses show that, given the current limited insight concerning the process window of EUV generation, the HPAM module should have an actuator pitch of ≤ 4 mm. Furthermore we have modelled the sensitivity of performance with respect to dimpling and actuator noise. For example, for a deformable mirror with an actuator pitch of 4 mm, and if the associated performance impact is to be limited to smaller than 5%, the actuator noise should be smaller than 45 nm (rms). Our tools assist in the detailed design process by assessing the performance impact of various design choices, including for example those that affect the shape and spectral content of the influence function. |
| Databáze: | OpenAIRE |
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