Preprint Article Version 1 This version is not peer-reviewed

Exploring the Relationship Between Electrical Characteristics and Changes in Chemical Composition and Structure of OSG Low-k Films under Thermal Annealing

Version 1 : Received: 25 September 2024 / Approved: 26 September 2024 / Online: 26 September 2024 (10:54:45 CEST)

How to cite: Gerelt-Od, M.; Kolesnikova, T. G.; Mokrushev, P. A.; Vishnevskiy, A. S.; Vorotilov, K. A.; Gismatulin, A. A.; Gritsenko, V. A.; Baklanov, M. R. Exploring the Relationship Between Electrical Characteristics and Changes in Chemical Composition and Structure of OSG Low-k Films under Thermal Annealing. Preprints 2024, 2024092101. https://doi.org/10.20944/preprints202409.2101.v1 Gerelt-Od, M.; Kolesnikova, T. G.; Mokrushev, P. A.; Vishnevskiy, A. S.; Vorotilov, K. A.; Gismatulin, A. A.; Gritsenko, V. A.; Baklanov, M. R. Exploring the Relationship Between Electrical Characteristics and Changes in Chemical Composition and Structure of OSG Low-k Films under Thermal Annealing. Preprints 2024, 2024092101. https://doi.org/10.20944/preprints202409.2101.v1

Abstract

The paper is dedicated to studying the influence of annealing temperature on the chemical, structural and electrophysical properties of low-k films made from porous organosilicate glasses containing terminal methyl groups. The films were deposited using centrifugation, followed by drying at 200 °C and annealing at temperatures ranging from 350 °C to 900 °C. Changes in refractive index, porosity, pore size, chemical composition, and electrical properties as a function of annealing temperature are evaluated. The results of JV measurements indicate that the methyl-modified film, which was annealed at 450 °С, demonstrates minimal leakage currents. This phenomenon can be explained by the almost complete removal of surfactant residues and non-condensed silanols, as well as the minimal thermal degradation of methyl groups. The results of the study on leakage current models in methyl-modified films, obtained at various annealing temperatures, lead us to conclude that the predominant mechanism of charge carrier transfer is Poole–Frenkel emission.

Keywords

leakage current; porosity; methyl modified silicate; ellipsometric porosimetry; FTIR spectroscopy

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

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