Printed Electronics: from science to applications
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Transcript of Printed Electronics: from science to applications
Printed electronics: from science to applications
Dr. A. Chiolerio, P.I.
Center for Space Human Robotics
Torino, Italy
A&T 20th Apr 2016
“Quell'artefice o scienziato o cultore di qualunque disciplina, che sarà usato paragonarsi, non con altri cultori di essa, ma con essa medesima, più che sarà eccellente, più basso concetto avrà di se: perché meglio conoscendo le profondità di quella, più inferiore si troverà nel paragone.” G. Leopardi (1798-1837) – Pensieri, LXIV That creator or scientist or student of any discipline , which will be used to compare himself, not with other lovers of it, but with it itself, the more he will be excellent , the lower concept will have of himself: because better knowing the depth of that, the lower he will find himself in the comparison. G. Leopardi (1798-1837) – Pensieri, LXIV
1454 A.D.
DROP ON DEMAND
-Addictive Technique (no further removal steps are needed)#, safe for the substrate (lower substrate damage risk)# -Material is used without any waste (spin-coating losses 95%)#, a large variety of materials may be used
-Piezoelectric heads: high duration in comparison to thermal ones -Cheap compared to silicon technology, no wasted materials, easy to implement -Resolution: depends on the head, substrate and ink.
Adv. Mater. 25:31 (2013) 4210-4244
WHY PRINTING?
Endurance
Sustainability
Low-cost
Easy manufacturing
Flexible substrates
Processing: Inkjet Direct Printing
INK REQUIREMENTS - Printability: adjustable viscosity (low), surface tension and solvent evaporation rate - Easy to prepare and process: nanoparticle fillers, fast polymerization of the matrix - Possibly absence of organic solvents (water-based) - A plus is the absence of post-curing (i.e. thermal). State of the art Metal nanoparticle-based inks: require thermal sintering.
J. Mater. Chem. A 3 (2015) 2407-2413
NANOSCALE RESOLUTION?
Other closely related techniques / hybrid approaches are shown, to achieve high resolution printing.
Adv. Mater. 25:31 (2013) 4210-4244
WHAT CAN BE DONE
-Superstructures obtained by in-situ reactions and self-assembly; - Fully printed TFT based on doped oxides
Small 14 (2015) 1649-1654
Adv. Electron. Mater. In press DOI: 10.1002/aelm.201500086
WHAT CAN BE DONE
https://www.youtube.com/watch?v=H5ohOFtJ3Yg
Au NPs under 300 keV – JEOL
Pb on Si (111) PRL 98 – 156102 (2007)
https://www.youtube.com/watch?v=lm9Zr3z3iWA
AG NPS
PrintTAG project (2009-2011)
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Macromol. Chem. Phys. 211 (2010) 2008 Mat. Sci. Eng. B 177 (2012) 373
PERCOLATION THEORY
Percolation theory: universal model for disordered systems. At criticality, percolation occurs and the system becomes conductive. The critical concentration only depends on the lattice properties.
LATTICE pc s d=2 z=3 0.3116±0.0001 1.30±0.02
d=3 z=6 0.6962±0.0001 0.74±0.03
M. Sahimi, Application of Percolation Theory, Taylor & Francis, London 1994
APPLICATIONS
Microelectron. Eng. 88 (2011) 2481 Organic Elec. 15 (2014) 91 Nanoscale Res. Lett. 7 (2012) 502 J. Raman Spectr. 43 (2012) 730
INJECTA
Heaters directly printed on aluminum
Brazing tests sample AV6-TR-6 . Heater samples AV7-RR5-2
Substrates: anodization either 20-25 or 40-45 microns. Insulation: InkA-I201 bar-coated. Print: C-100. Coverlayer (only heaters): SCC3.
I-201 (30.000 cP) with no surface treatment.
I-201 (30.000 cP) surface treated at 230 °C 30 min.
INJECTA
Heaters directly printed on aluminum and kapton®
Sinterization treatment of a heater inkjetted on a kapton® foil .
Uniformity test under thermal camera. Top row: heaters inkjetted on a kapton® foil; bottom row: heaters inkjetted on aluminum plate. Left: front. Right: back face.
STEPS2
Ag heaters printed on flex PCBs
A research project funded by Regione Piemonte Heaters directly printed on polyimide
Acknowledgements K. Rajan J. Alladin S. Bocchini I. Roppolo M. Laurenti A. Asvarov A. Chiappone K. Bejtka C.F. Pirri - Coordinator of CSHR
M. Sangermano
D. Perrone C. Ricciardi S. Porro D. Conti
P. Pandolfi M. Cotto P. Martino G. Ferraro
Xjet Technology
www.politronica.eu
www.polito.it