A12-083 DROPLET BEHAVIORS ON SUBSTRATES IN THIN-FILM FORMATION USING INK-JET PRINTING

概要

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Physical phenomena associated with the dynamic spreading and dried shape of droplets on solid surfaces were reviewed and discussed with regard to designing the most suitable thin-film formation processes using ink-jet printing. After droplets strike a substrate surface and expand for several microseconds, they spread semi-statically for tens of seconds and asymptotically approach the final equilibrium shape determined by the droplet volume and the contact angle. The contact angle and the volume, number, and impact velocity of droplets for various ink-jet-deposition applications can be designed by using semi-empirical formulas. If the contact angle at the edge of droplet on the substrate is small, a large amount of solute might accumulate there during the drying process because the evaporation rate there is high. The evaporation rate distribution on droplet surfaces should therefore be controlled to be uniform during drying.
一般社団法人日本機械学会の論文
2003-11-30