{'fraction_non_alphanumeric': 0.01775147928994083, 'fraction_numerical': 0.0019723865877712033, 'mean_word_length': 5.773333333333333, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Accuracy of ellipsometric measurements of Si-SiO2 structures

We consider features and restrictions of ellipsometry as applied to the system consisting of a silicon dioxide film on silicon, which is widely used in nanoelectronics. A method is developed for ellipsometric determination of the presence or absence of the "film-substrate" interfacial layer. Contributions of various factors into the total measurement uncertainty are analyzed, including the factors related to the ellipsometer characteristics.