Droplet Behaviors on Substrates in Thin-Film Formation Using Ink-Jet Printing

Physical phenomena associated with the dynamic spreading and dried shape of droplets on solid surfaces were demonstrated reviewing several models 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 droplet volume and 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 in radial direction during drying.

[1]  J. Fukai,et al.  Maximum spreading of liquid droplets colliding with flat surfaces , 1998 .

[2]  F. Parisse,et al.  Shape Changes of Colloidal Suspension Droplets during Drying , 1996 .

[3]  Kuniaki Nagayama,et al.  Stripe patterns formed on a glass surface during droplet evaporation , 1995 .

[4]  Makoto Shioya,et al.  Impact of an ink drop on paper , 1993 .

[5]  H. Sirringhaus,et al.  High-Resolution Ink-Jet Printing of All-Polymer Transistor Circuits , 2000, Science.

[6]  D. Bogy.  Drop Formation in a Circular Liquid Jet , 1979 .

[7]  T. Shimoda,et al.  Film Formation by Inkjet. Behavior of Inkjet Droplets. , 2003 .

[8]  Lung. Cheng.  Dynamic Spreading of Drops Impacting onto a Solid Surface , 1977 .

[9]  Honghi Tran,et al.  Spread and rebound of liquid droplets upon impact on flat surfaces , 1997 .

[10]  A. Marmur.  Equilibrium and spreading of liquids on solid surfaces , 1983 .

[11]  Nagel,et al.  Contact line deposits in an evaporating drop , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[12]  M. Fisch,et al.  Evaporation Kinematics of Polystyrene Bead Suspensions , 1997 .

[13]  R. Friend,et al.  26.3: Multicolor Pixel Patterning of Light‐Emitting Polymers by Ink‐Jet Printing , 1999 .

[14]  R. Badie,et al.  Mechanism of drop constriction in a drop-on-demand inkjet system , 1997, Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[15]  D. Bousfield,et al.  Newtonian drop impact with a solid surface , 1995 .

[16]  A. M. Cazabat,et al.  Spreading and Instabilities Induced by a Solutal Marangoni Effect , 1998 .

[17]  Hideyuki Yoshimura,et al.  Mechanism of formation of two-dimensional crystals from latex particles on substrates , 1992 .

[18]  F. Talke,et al.  Impact of a liquid drop against a flat surface , 1981 .

[19]  R. Deegan,et al.  Pattern formation in drying drops , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[20]  T. Dupont,et al.  Capillary flow as the cause of ring stains from dried liquid drops , 1997, Nature.

[21]  L. Tanner,et al.  The spreading of silicone oil drops on horizontal surfaces , 1979 .

[22]  P. Gennes.  Wetting: statics and dynamics , 1985 .

[23]  Chung-Chih Wu,et al.  Ink-jet printing of doped polymers for organic light emitting devices , 1998 .

[24]  Frank E. Talke,et al.  Drop formation by DOD ink-jet nozzles: a comparison of experiment and numerical simulation , 1987 .

[25]  P. Kavehpour,et al.  Evaporatively-driven Marangoni instabilities of volatile liquid films spreading on thermally conductive substrates , 2002 .