MSE 2022
Lecture
29.09.2022 (CEST)
Increasing the resolution and processing window of Laser-induced Forward Transfer (LIFT) of silver-nanoparticle inks
GR

Prof. Dr. Gert-Willem Römer

University of Twente

Römer, G.-w. (Speaker)¹; Arutinov, G.²; Feinauegle, M.¹; Miksys, J.³
¹University of Twente, Enschede (Netherlands); ²Holst Centre/TNO, Eindhoven (Netherlands); ³University of Twente & Holst Centre/TNO, Enschede & Eindhoven (The Netherlands) (Netherlands)
Vorschau
19 Min. Untertitel (CC)

Laser-induced Forward Transfer (LIFT) is an additive manufacturing technique, in which a laser beam induces the deposition of material (donor) onto a substrate (receiver). In LIFT, the donor material is coated on the bottom of a substrate (carrier). This carrier substrate is to be transparent to the wavelength of the laser radiation used. The laser energy is absorbed by the donor at the carrier-donor interface. As a result, a small volume of the donor material is transferred to the receiver.  In the field of printed electronics, silver nano-particle (AgNP) based inks are used as conductive material. LIFT of these inks has been successfully demonstrated, but the limits in reducing the deposition size/volume has not been studied sufficiently. We present experimental results showing how the main processing parameters (laser pulse duration, laser spot diameter, laser pulse energy, donor layer thickness and the distance between the donor layer and the receiver) affect the size of the AgNP ink depositions. It was found that the smallest reproducible deposits had a diameter of about 40 um, when a spot diameter of about 10 um is used, as well as a donor layer thickness of about 3 um and a print distance of 13 um.  Next we present the results of several new LIFT approaches, which can be employed to reduce the deposition size/volume, as well as to increase the processing window of LIFT of AgNP inks.

Abstract

Abstract

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