Original Article
Direct integration of dielectric all-ceramic thick films on a polymer substrate using room temperature fabrication

https://doi.org/10.1016/j.jeurceramsoc.2020.04.009Get rights and content
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Highlights

  • All-ceramic composite thick films seamlessly integrated with a polymeric substrate.

  • Simple method for manufacture all-ceramic thick films.

  • Printable ceramic pastes realized without the use of organic additives or vehicles.

  • High temperature processing not needed.

Abstract

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.

Keywords

Low temperature processing
Microwave dielectric properties
Screen printing
Lithium molybdate
Barium titanate

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