Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/117594
Title: | Laser forward transfer of conductive inks |
Author: | Navarro Campos, Júlia |
Director/Tutor: | Serra Coromina, Pere |
Keywords: | Làsers Impressió digital Treballs de fi de grau Lasers Digital printing Bachelor's theses |
Issue Date: | Jun-2017 |
Abstract: | One of the most used inks in printed electronics is silver paste, which is extensively used in screen printed circuits. In this work the feasibility of Laser-Induced Forward Transfer (LIFT) technique was investigated for transferring screen printing silver paste. It was possible to print several droplets at different laser pulse energies for a certain donor-acceptor gap. After that, two studies were carried out: the analysis of the deposited droplets and the characterization of the dynamics of the material transfer. An approximately linear trend in the radius-energy dependence was observed, and thicknesses of the printed droplets were of the order of a few microns. The transfer dynamics was characterized by means of a time-resolved imaging method, showing three different stages on the bubble evolution: bubble expansion, bubble burst and bubble retraction. Jet formation never took place as it happens in low-viscosity inks. Results in both experiments were conclusive and consistent with each other |
Note: | Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2016, Tutor: Pere Serra Coromina |
URI: | http://hdl.handle.net/2445/117594 |
Appears in Collections: | Treballs Finals de Grau (TFG) - Física |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Navarro Campos Júlia.pdf | 711.2 kB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License