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Printing of silver conductive lines through laser-induced forward transfer

Optical metrology
R&D Technician, BSc in Physics, MSc in Photonics at Sensofar Metrology | Other articles

Pol joined Sensofar during an internship from his bachelor’s degree. Since then, he has worked in the R&D department testing the metrological performance of Sensofar systems, developing new algorithms for optical techniques and improving the existing ones. Currently he is conducting his industrial PhD at the Technical University of Catalonia (UPC) in collaboration with Sensofar about ultra-fast optical sensors for surface metrology. His main research interests are optical design and optical metrology.

Printing of silver conductive lines through laser-induced forward transfer full article
C.Florian1, F.Caballero-Lucas1, J.M.Fernández-Pradas1, S.Ogier2, L.Winchester2, D.Karnakis3, R.Geremia3, R.Artigas4, P.Serra1
1Universitat de Barcelona, Departament de Física Aplicada i Òptica, IN2UB, Martí i Franquès 1, E-08028, Barcelona, Spain
2Centre for Process and Innovation Ltd, The Wilton Centre, TS10 4RF, Cleveland, United Kingdom
3Oxford Lasers Ltd, Unit 8 Moorbrook Park, OX11 7HP, Didcot, United Kingdom
4Sensofar-Tech, S.L. (Spain)
Applied Surface Science,
Volume 374, 30 June 2016, Pages 265-270

Abstract

The generation of conductive lines from liquid inks through laser-induced forward transfer (LIFT) is achieved by printing a sequence of overlapping droplets. This procedure, however, is not free from drawbacks: the formation of continuous lines is often accompanied with undesired scalloping or bulging. In this work we present an innovative method consisting in the deposition of conductive ink through LIFT inside fluidic guides produced by laser ablation. The aim of the approach is that the guides confine the liquid within them so that the most common defects can be prevented. The production of guides through laser ablation followed by LIFT of ink inside them has proved that it is possible to find conditions in which the total confinement of liquid within the guides is achieved with good uniformity all along the line. This proves the feasibility of the proposed approach for printing continuous lines free from scalloping and bulging with excellent definition.

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