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- W2599346562 abstract "Minimization and control of line-edge roughness (LER) and contact-edge roughness (CER) is one of the current challenges limiting EUV line-space and contact hole printability. One significant contributor to feature roughness and CD variability in EUV is photon shot noise (PSN); others are the physical and chemical processes in photoresists, known as resist stochastic effect. Different approaches are available to mitigate each of these contributions. In order to facilitate this mitigation, it is important to assess the magnitude of each of these contributions separately from others. In this paper, we present and test a computational approach based on the concept of an ‘ideal resist’. An ideal resist is assumed to be devoid of all resist stochastic effects. Hence, such an ideal resist can only be simulated as an ‘ideal resist model’ (IRM) through explicit utilization of the Poisson statistics of PSN<sup>2</sup> or direct Monte Carlo simulation of photon absorption in resist. LER estimated using IRM, thus quantifies the exclusive contribution of PSN to LER. The result of the simulation study done using IRM indicates higher magnitude of contribution (60%) from PSN to LER with respect to total or final LER for a sufficiently optimized high dose ‘state of the art’ EUV chemically amplified resist (CAR) model." @default.
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- W2599346562 date "2017-03-27" @default.
- W2599346562 modified "2023-09-23" @default.
- W2599346562 title "Separating the optical contributions to line-edge roughness in EUV lithography using stochastic simulations" @default.
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- W2599346562 doi "https://doi.org/10.1117/12.2258693" @default.
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