Characterization of laser-sintered thick-film paste on polycarbonate substrates

J Putaala (Corresponding Author), M Sobocinski, Saara Ruotsalainen, J Juuti, Petri Laakso, H Jantunen

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

This paper presents the results of a study of laser-sintered commercially available thick-film silver paste printed on polycarbonate (PC) substrates. This material combination would not be possible to manufacture by normal processing routes, i.e. furnace sintering at a high temperature, due to the substrate's decomposition. With laser, however, localized heating enables the use of low-temperature materials such as PC. Furthermore, with laser processing, patterning can be done very accurately, thus enabling precise manufacturing of dimensionally sensitive components, e.g. RF structures and their fine tuning, while also enabling customization of components. Since silver has less resistivity than e.g. aluminum or copper, it is a good choice as a conductor material. In addition, a thick-film printed conductor as an alternative to more expensive printed electronics nanomaterials could enable more cost-effective electronic structures. In this work the electrical and adhesion properties and the microstructure of sintered thick-film silver paste were investigated. The results show that work is still needed to tune the process so that more energy can be used to heat the silver paste to induce its sintering while the substrate temperature is kept below its glass transition temperature. Still, conductivity of 15% of bulk silver was achieved with studied setup and parameters
Original languageEnglish
Pages (from-to)19-27
JournalOptics and Lasers in Engineering
Volume56
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fingerprint

polycarbonate
polycarbonates
Ointments
Polycarbonates
Silver
Thick films
thick films
silver
Lasers
Substrates
lasers
sintering
Sintering
conductors
Processing
Aluminum
Nanostructured materials
Temperature
glass transition temperature
Electronic structure

Keywords

  • Conductivity
  • laser sintering
  • low temperature
  • microstructure

Cite this

Putaala, J., Sobocinski, M., Ruotsalainen, S., Juuti, J., Laakso, P., & Jantunen, H. (2014). Characterization of laser-sintered thick-film paste on polycarbonate substrates. Optics and Lasers in Engineering, 56, 19-27. https://doi.org/10.1016/j.optlaseng.2013.08.023
Putaala, J ; Sobocinski, M ; Ruotsalainen, Saara ; Juuti, J ; Laakso, Petri ; Jantunen, H. / Characterization of laser-sintered thick-film paste on polycarbonate substrates. In: Optics and Lasers in Engineering. 2014 ; Vol. 56. pp. 19-27.
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Putaala, J, Sobocinski, M, Ruotsalainen, S, Juuti, J, Laakso, P & Jantunen, H 2014, 'Characterization of laser-sintered thick-film paste on polycarbonate substrates', Optics and Lasers in Engineering, vol. 56, pp. 19-27. https://doi.org/10.1016/j.optlaseng.2013.08.023

Characterization of laser-sintered thick-film paste on polycarbonate substrates. / Putaala, J (Corresponding Author); Sobocinski, M; Ruotsalainen, Saara; Juuti, J; Laakso, Petri; Jantunen, H.

In: Optics and Lasers in Engineering, Vol. 56, 2014, p. 19-27.

Research output: Contribution to journalArticleScientificpeer-review

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AB - This paper presents the results of a study of laser-sintered commercially available thick-film silver paste printed on polycarbonate (PC) substrates. This material combination would not be possible to manufacture by normal processing routes, i.e. furnace sintering at a high temperature, due to the substrate's decomposition. With laser, however, localized heating enables the use of low-temperature materials such as PC. Furthermore, with laser processing, patterning can be done very accurately, thus enabling precise manufacturing of dimensionally sensitive components, e.g. RF structures and their fine tuning, while also enabling customization of components. Since silver has less resistivity than e.g. aluminum or copper, it is a good choice as a conductor material. In addition, a thick-film printed conductor as an alternative to more expensive printed electronics nanomaterials could enable more cost-effective electronic structures. In this work the electrical and adhesion properties and the microstructure of sintered thick-film silver paste were investigated. The results show that work is still needed to tune the process so that more energy can be used to heat the silver paste to induce its sintering while the substrate temperature is kept below its glass transition temperature. Still, conductivity of 15% of bulk silver was achieved with studied setup and parameters

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