Laser-induced forward transfer of high-viscosity silver pastes

2016 ◽  
Vol 366 ◽  
pp. 389-396 ◽  
Author(s):  
D. Munoz-Martin ◽  
C.F. Brasz ◽  
Y. Chen ◽  
M. Morales ◽  
C.B. Arnold ◽  
...  
Keyword(s):  
High Viscosity ◽  
Forward Transfer

Laser induced forward transfer of high viscosity silver paste on double groove structure

2022 ◽  
Vol 148 ◽  
pp. 107795
Author(s):  
Yilin Shan ◽  
Xianmin Zhang ◽  
Gengchao Chen ◽  
Kai Li
Keyword(s):  
High Viscosity ◽  
Silver Paste ◽  
Forward Transfer ◽  
Groove Structure

scholarly journals Overlapping Limitations for ps-Pulsed LIFT Printing of High Viscosity Metallic Pastes

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 168 ◽  
Author(s):  
David Munoz-Martin ◽  
Yu Chen ◽  
Miguel Morales ◽  
Carlos Molpeceres
Keyword(s):  
Laser Pulse ◽  
Short Distance ◽  
Laser Pulse Energy ◽  
Laser Pulses ◽  
High Viscosity ◽  
Single Step ◽  
High Speeds ◽  
Forward Transfer ◽  
Micron Size ◽  
Interference Problems

Laser-induced forward transfer (LIFT) technique has been used for printing a high viscosity (250 Pa·s) commercial silver paste with micron-size particles (1–4 µm). Volumetric pixels (voxels) transferred using single ps laser pulses are overlapped in order to obtain continuous metallic lines. However, interference problems between successive voxels is a major issue that must be solved before obtaining lines with good morphologies. The effects of the laser pulse energy, thickness of the donor paste film, and distance between successive voxels on the morphology of single voxels and lines are discussed. Due to the high viscosity of the paste, the void in the donor film after a printing event remains, and it negatively affects the physical transfer mechanism of the next laser pulses. When two laser pulses are fired at a short distance, there is no transfer at all. Only when the pulses are separated by a distance long enough to avoid interference but short enough to allow overlapping (≈100 µm), is it possible to print continuous lines in a single step. Finally, the knowledge obtained has allowed the printing of silver lines at high speeds (up to 60 m/s).

scholarly journals Influence of the Gap between Substrates in the Laser-Induced Transference of High-Viscosity Pastes

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5567
Author(s):  
Juan José Moreno-Labella ◽  
David Munoz-Martin ◽  
Guillermo Vallejo ◽  
Carlos Molpeceres ◽  
Miguel Morales
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
High Viscosity ◽  
Comsol Multiphysics ◽  
Forward Transfer

Laser-induced forward transfer for high-viscosity—of Pa·s—pastes differ from standard LIFT processes in its dynamics. In most techniques, the transference after setting a great gap does not modify the shape acquired by the fluid, so it stretches until it breaks into droplets. In contrast, there is no transferred material when the gap is bigger than three times the paste thickness in LIFT for high-viscosity pastes, and only a spray is observed on the acceptor using this configuration. In this work, the dynamics of the paste have been studied using a finite-element model in COMSOL Multiphysics, and the behavior of the paste varying the gap between the donor and the acceptor substrates has also been modeled. The paste bursts for great gaps, but it is confined when the acceptor is placed close enough. The obtained simulations have been compared with a previous work, in which the paste structures were photographed. The analysis of the simulations in terms of speed allows for predicting the burst of the paste—spray regime—and the construction of a printability map regarding the gap between the substrates.

Laser-induced forward transfer of high-viscosity silver precursor ink for non-contact printed electronics

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 77942-77947 ◽  
Author(s):  
Tetsuji Inui ◽  
Rajesh Mandamparambil ◽  
Teppei Araki ◽  
Robert Abbel ◽  
Hirotaka Koga ◽  
...  
Keyword(s):  
Printed Electronics ◽  
High Viscosity ◽  
Contact Printing ◽  
Forward Transfer

Non-contact printing of high-viscosity silver precursor inks was achieved to provide highly conductive lines by a laser-induced forward transfer technique.

scholarly journals Laser Induced Forward Transfer of High Viscosity Silver Paste for New Metallization Methods in Photovoltaic and Flexible Electronics Industry

2016 ◽  
Vol 83 ◽  
pp. 204-210 ◽  
Author(s):  
Y. Chen ◽  
D. Munoz-Martin ◽  
M. Morales ◽  
C. Molpeceres ◽  
E. Sánchez-Cortezon ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
High Viscosity ◽  
Electronics Industry ◽  
Silver Paste ◽  
Forward Transfer

Ultra low aluminium DWI grade development of an atypical continuous casting powder with high viscosity

2009 ◽  
Vol 106 (6) ◽  
pp. 242-247
Author(s):  
C. Damerval ◽  
H. Tavernier ◽  
L. Avedian ◽  
P. Disant ◽  
P. Delfosse ◽  
...  
Keyword(s):  
Continuous Casting ◽  
High Viscosity

EFFERVESCENT ATOMIZATION OF HIGH-VISCOSITY FLUIDS: PART I. NEWTONIAN LIQUIDS

1991 ◽  
Vol 1 (3) ◽  
pp. 239-252 ◽  
Author(s):  
Harry N. Buckner ◽  
Paul E. Sojka
Keyword(s):  
High Viscosity ◽  
Newtonian Liquids
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