Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Laser-induced forward transfer of high-viscosity silver pastes
Year:2016
Research Areas
  • Engineering
Information
Abstract
In this work, a study of the morphology of individual dots of silver paste deposited by laser-induced forward transfer (LIFT) is performed using a ns-pulsed laser at 532 nm. The LIFT process is characterized by scanning confocal microscopy on the deposited material and in-situ time-resolved imaging during the transfer in order to illuminate the flow dynamics in relation to the pulse energy and paste thickness. The influence of process parameters on the structure of transferred dots is explained both phenomenologically and analytically. Depending on the experimental conditions, different transfer regimes were observed. These regimes have similarities to those reported for LIFT of Newtonian fluids and nanopastes, but the multiphase and non-Newtonian rheology and thicker films used lead to noticeable differences, such as the formation of a continuous and stable pillar connecting donor and acceptor substrates when the paste film is thick enough and the energy is optimum. This process regime allows transfer of dots with high aspect ratios, which is desirable for the printing of contacts on solar cells.
International
Si
JCR
Si
Title
Applied surface surface science
ISBN
0169-4332
Impact factor JCR
3,15
Impact info
Volume
366
http://dx.doi.org/10.1016/j.apsusc.2016.01.029
Journal number
From page
389
To page
396
Month
ENERO
Ranking
Participants
  • Autor: David Muñoz Martin (UPM)
  • Autor: Frederik Brasz (Princeton University)
  • Autor: Yu Chen (UPM)
  • Autor: Miguel Morales Furio (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
  • Autor: Craig Arnold (Princeton University)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Física Aplicada e Ingeniería de Materiales
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)