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Optimization and characterization of Drop-on-Demand inkjet printing process for platinum organometallic inks

TitleOptimization and characterization of Drop-on-Demand inkjet printing process for platinum organometallic inks
Publication TypeConference Proceedings
Year of Conference2011
AuthorsCummins, G., R. Kay, J. Terry, M. P. Y. Desmulliez, and A. J. Walton
Conference NameEngineering Packaging and Technology Conference (EPTC)
Pagination256 - 261
Abstract

Inkjet printing has been extensively used over the past 30
years in the graphic arts and packaging industries. This
technology involves dispensing accurately positioned droplets
of ink onto a substrate, which then solidifies through the
evaporation of the constituent solvent, the cross-linking of a
polymer or through crystallization. The mask-less, flexible,
rapid and low cost nature of inkjet printing, combined with the
development of a range of functional inks, has led to the
adoption of this technology in system manufacturing. The
SMART Microsystems research project underway at the
Institute for Integrated Systems is investigating the use of this
technique in the rapid customization of CMOS foundry wafers
for More-than-Moore applications.
This paper presents results obtained during the
development and optimization of a drop-on-demand inkjet
printing process for initial batches of platinum organometallic
inks. Drop-on-Demand (DOD) inkjet printing works by
inducing a transient pressure pulse in the ink reservoir through
electrical excitation of either a thermal or piezoelectric
element. The correct implementation of this excitation signal
is necessary to produce a pressure pulse capable of
reproducibly and reliably generating a series of droplets. The
effects of system parameters on the formation of these
droplets are investigated. Methods used to characterize droplet
ejection are also described.