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Spectrally Enhanced Photonic Sintering
XaarJet AB, Sweden.
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2012 (English)In: NIP28 : 28th international conference on digital printing technologies : technical program and proceedings: Digital fabrication 2012 : September 9-13, 2012, Quebec City, Quebec, Canada, The Society for Imaging Science and Technology, 2012, 424-430 p.Conference paper (Refereed)
Abstract [en]

Inkjet printing with silver nanoparticle inks is frequently being used to print electrically conductive structures. However, typically slow thermal post-processes are applied to produce metallic contact between the nanoparticles resulting in the high electrical conductivity. In an earlier evaluation a number of different post-process were investigated for their capability to sinter the inkjet printed structures within such short time frame to allow for integration into roll-to-roll or roll-to-sheet machines. Among the different techniques like IR-irradiation, and Rapid Electrical Sintering, Photonic Sintering appeared as the most prominent candidate, and was shown to enable electrical conductivities equal to oven sintering. In that previous investigation the inkjet printed structures were dried and subsequently shipped for off-line post treatment. The hybrid process of inkjet printing of silver nanoparticle inks and photonic sintering was further investigated with the goal to implement both processes on a roll-to-roll machine. Specifically it was attempted to perform the photonic sintering process with a single lamp and without an intermediate drying process. In this paper we investigate the sintering characteristics of an inkjet printed, wet deposit having liquid volumes of 510 pL per 100 μm2 on non-absorbing substrates using a single Xenon Sintering 2000 system. The paper specifically highlights the importance of radiation homogeneity, threshold energy, substrate and track morphology onto the sintering process. The influence of the spectral composition of the light is analyzed. The findings allow for spectral tailoring of the process to successfully work on PI and PET irrespective of the illumination source.

Place, publisher, year, edition, pages
The Society for Imaging Science and Technology, 2012. 424-430 p.
Keyword [en]
Electrical conductivity, Electrically conductive, High electrical conductivity, Illumination sources, Photonic sintering, Silver nanoparticles, Sintering characteristics, Spectral composition
National Category
Other Engineering and Technologies
URN: urn:nbn:se:kth:diva-159659ScopusID: 2-s2.0-84875750030ISBN: 978-089208302-2OAI: diva2:786643
28th International Conference on Digital Printing Technologies, NIP 2012 and Digital Fabrication 2012, Quebec City, QC, Canada, 9 September 2012 through 13 September 2012

QC 20150206

Available from: 2015-02-06 Created: 2015-02-06 Last updated: 2015-02-06Bibliographically approved

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Reinhold, Ingo
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