Optics and Precision Engineering, Volume. 33, Issue 9, 1341(2025)
Low signal-to-noise ratio spectral interferometry film thickness measurement based on self-attention neural network
[1] LI ZH Y, LIU Z H, WANG Y Y et al. High-precision laser confocal measurement of semiconductor wafer thickness[J]. Optics and Precision Engineering, 32, 956-965(2024).
李兆宇, 刘子豪, 王瑶莹. 高精度激光共焦半导体晶圆厚度测量[J]. 光学 精密工程, 32, 956-965(2024).
[2] ORJI N, BADAROGLU M, BARNES B et al. Metrology for the next generation of semiconductor devices[J]. Nature Electronics, 1, 532-547(2018).
[3] JIN Y, YU K. A review of optics-based methods for thickness and surface characterization of two-dimensional materials[J]. Journal of Physics D Applied Physics, 54, 393001(2021).
[4] YOON J, CHUN I S et al. GaAs photovoltaics and optoelectronics using releasable multilayer epitaxial assemblies[J]. Nature, 465, 329-333(2010).
[5] LU W, ROH I P, GEUM D M et al. 10-nm Fin-width InGaSb p-channel self-aligned FinFETs using antimonide-compatible digital etch[C], 2, 1-17(2017).
[6] OHASHI T, YAMAGUCHI A, HASUMI K et al. Precise measurement of thin-film thickness in 3D-NAND device with CD-SEM[J]. Nanolithography, MEMS, and MOEMS, 17, 1(2018).
[7] YU W J, LI Z, ZHOU H L et al. Vertically stacked multi-heterostructures of layered materials for logic transistors and complementary inverters[J]. Nature Materials, 12, 246-252(2013).
[8] TSURU T, YAMAMOTO M. Precise determination of layer structure with EUV ellipsometry data obtained by multilayer polarizing elements[J]. Physica Status Solidi C, 5, 1129-1132(2008).
[9] PRICE J, HUNG P Y, RHOAD T et al. Spectroscopic ellipsometry characterization of Hf
[10] TIKHONRAVOV A V, TRUBETSKOV M K. Online characterization and reoptimization of optical coatings[C], 5250, 406-413(2004).
[11] AKBALıK A, SOULAN S, TORTAI J H et al. An inverse ellipsometric problem for thin film characterization: comparison of different optimization methods[C](2009).
[12] GAO L H, LEMARCHAND F, LEQUIME M. Comparison of different dispersion models for single layer optical thin film index determination[J]. Thin Solid Films, 520, 501-509(2011).
[13] AMOTCHKINA T V, TRUBETSKOV M K, PERVAK V et al. On the reliability of reverse engineering results[J]. Applied Optics, 51, 5543(2012).
[14] PARK J et al. Optical method for simultaneous thickness measurements of two layers with a significant thickness difference[J]. Optics Express, 29, 31615-31631(2021).
[15] KIM K, KWON S, PAHK H J. Fast analysis of film thickness in spectroscopic reflectometry using direct phase extraction[J]. Current Optics and Photonics, 1, 29-33(2017).
[16] PARK J, JANG Y S et al. Thickness measurements and uncertainty evaluation of a multilayer thin-film sample using auxiliary single-layer samples[J]. Metrologia, 60(2023).
[17] NA J, CHOI H Y, CHOI E S et al. Self-referenced spectral interferometry for simultaneous measurements of thickness and refractive index[J]. Applied Optics, 48, 2461-2467(2009).
[18] FAN L J, CHEN A, LI T Y et al. Thin-film neural networks for optical inverse problem[J]. Light: Advanced Manufacturing, 2, 1(2021).
[19] RÉDEI L, FRIED M, BÁRSONY I et al. A modified learning strategy for neural networks to support spectroscopic ellipsometric data evaluation[J]. Thin Solid Films, 313, 149-155(1998).
[20] FRIED M, MASA P. Backpropagation (neural) networks for fast pre-evaluation of spectroscopic ellipsometric measurements[J]. Journal of Applied Physics, 75, 2194-2201(1994).
[21] LIN X J, WU Z W, YE R Q et al. Bump height measurement of chip packaging based on white light triangulation[J]. Optics and Precision Engineering, 31, 1890-1899(2023).
林贤锦, 吴祖伟, 叶瑞乾. 基于白光三角法的芯片封装凸点高度测量[J]. 光学 精密工程, 31, 1890-1899(2023).
[23] CHOI J E, SONG J, LEE Y H et al. Deep neural network modeling of multiple oxide/nitride deposited dielectric films for 3D-NAND flash[J]. Applied Science and Convergence Technology, 29, 190-194(2020).
[24] KWAK H, CHO S et al. Non-destructive thickness characterisation of 3D multilayer semiconductor devices using optical spectral measurements and machine learning[J]. Light: Advanced Manufacturing, 2, 9(2021).
[25] KRIZHEVSKY A, SUTSKEVER I, HINTON G E. ImageNet classification with deep convolutional neural networks[J]. Communications of the ACM, 60, 84-90(2017).
[26] SHERSTINSKY A. Fundamentals of recurrent neural network (RNN) and long short-term memory (LSTM) network[J]. Physica D: Nonlinear Phenomena, 404, 132306(2020).
[27] Vaswani A, Shazeer N, Parmar N et al. Attention is all you need[C], 30(2017).
[28] MA X, ZHANG P, ZHANG S et al. A tensorized transformer for language modeling[C], 32(2019).
[29] LIU Z, LIN Y T, CAO Y et al. Swin transformer: hierarchical vision transformer using shifted windows[C], 10, 9992-10002(2021).
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Chen WANG, Zizheng WANG, Zhaoran LIU, Chengyuan YAO, Chunguang HU. Low signal-to-noise ratio spectral interferometry film thickness measurement based on self-attention neural network[J]. Optics and Precision Engineering, 2025, 33(9): 1341
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Received: Mar. 3, 2025
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Published Online: Jul. 22, 2025
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