Direct integration of dielectric all-ceramic thick films on a polymer substrate using room temperature fabrication
Väätäjä, Maria; Kähäri, Hanna; Ohenoja, Katja; Juuti, Jari; Jantunen, Heli (2020-04-11)
Maria Väätäjä, Hanna Kähäri, Katja Ohenoja, Jari Juuti, Heli Jantunen, Direct integration of dielectric all-ceramic thick films on a polymer substrate using room temperature fabrication, Journal of the European Ceramic Society, Volume 40, Issue 12, 2020, Pages 3984-3988, ISSN 0955-2219, https://doi.org/10.1016/j.jeurceramsoc.2020.04.009
© 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Direct integration of all-ceramic thick films and a polymer substrate has been realized for the first time without high temperature processing using the Room Temperature Fabrication method.
Printable Li2MoO4-BaTiO3 composite pastes with 0, 10, and 20 vol.% of BaTiO3 were fabricated from the respective ceramic powders and water without organic additives or vehicles. The pastes were stencil printed on a polyimide substrate and dried at 120 °C without pressing or lamination.
Using scanning electron microscopy, the films were observed to be in seamless contact with the substrate and to have a uniform microstructure. Relative permittivities of the ceramic films increased from 4.2 to 7.2 (at 2.5 GHz) and 4.5 to 7.5 (at 9.9 GHz) according to the vol.% content of the added BaTiO3, with corresponding dielectric losses from 10−3 to 10-2.
The results show that the room temperature fabrication method enables 2D printing of all-ceramic thick films on temperature-sensitive substrates.
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