Laser-induced forward transfer of high-viscosity silver pastes

摘要

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.