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Title: Drop-on-Demand Inkjet Printing Technology with Applications to Polymer Light-Emitting Diodes
Keywords: Drop-on-Demand Inkjet-Printing; PLED; Surface Cleaning; Contact Angle; Design Experiment; Drying
Issue Date: 4-Dec-2007
Citation: NG YUAN SONG (2007-12-04). Drop-on-Demand Inkjet Printing Technology with Applications to Polymer Light-Emitting Diodes. ScholarBank@NUS Repository.
Abstract: Polymer Light-Emitting Diodes (PLEDs) are now moving towards been produced by Drop-on-Demand Inkjet Printing (DoD-IJP). Three areas of work relating to PLEDs and IJP were performed. Surface wettability of Indium-Tin-Oxide coated glass substrates, which are common substrates for PLEDs, was characterized by contact angle measurements after cleaning using different processes. Patterning of substrates using parameters identified as stable and repeatable was conducted. IJP of a material commonly used for PLEDs were investigated. Using data from Taguchi design experiments and analyzed by Level Average Analysis, optimized piezoelectric pulse profile parameters was obtained for achieving droplets of better uniformity. The methodology of how a statistical method was combined with empirical experiments to optimize parameters for certain processes was shown. Printing of droplets on substrates was carried out and the influence of substrate temperature on dried profile of single droplets was investigated. An explanation was proposed as to why such shapes were obtained and how they change with substrate temperature.
Appears in Collections:Master's Theses (Open)

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