Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Inkjet Printing of Small Droplets Using M-shaped Waveforms

M-shaped 파형을 이용한 작은 액적의 잉크젯 프린팅

  • Hong, Songeun (School of Electrical & Electronic & Communication Engineering) ;
  • Choi, Jiho (School of Electrical & Electronic & Communication Engineering) ;
  • Kim, Gieun (Future Convergence Engineering, Korea University of Technology and Education) ;
  • Park, Jongwoon (School of Electrical & Electronic & Communication Engineering)
  • 홍송은 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 최지호 (한국기술교육대학교 전기.전자.통신공학부) ;
  • 김기은 (한국기술교육대학교 미래융합공학전공) ;
  • 박종운 (한국기술교육대학교 전기.전자.통신공학부)
  • Received : 2021.08.24
  • Accepted : 2021.09.16
  • Published : 2021.09.30
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Abstract

Using an inkjet printing process, we have investigated a droplet formation of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) near the orifice of a piezoelectric inkjet head. With an attempt to form the smallest droplet without any satellites, we have applied various waveforms such as the unipolar, bipolar, and M-shaped waveforms. It is found that the droplet velocity and volume vary depending sensitively on the waveform width and voltage. Of those, the M-shaped waveform is shown to provide the smallest droplet volume, followed by the bipolar and then unipolar waveforms. The droplet printed on a PET film roll by the M-shaped waveform has the diameter as small as 46.1 ㎛. It is likely that the second short unipolar in the M-shape waveform increases the droplet velocity gradient, rendering the droplet smaller.

Keywords

Acknowledgement

이 논문은 2021년도 한국기술교육대학교 교수 교육연구진흥과제 지원에 의하여 연구되었음.

References

  1. Sele, C., Von Werne, T., Friend, R., and Sirringhaus, H., "Lithography-Free, Self-Aligned Inkjet Printing with Sub-Hundred-Nanometer Resolution," Advanced Materials, Vol. 17, pp. 997-1001, 2005. https://doi.org/10.1002/adma.200401285
  2. Ko, S., Pan, H., Grigoropoulos, C., Luscombe, C., Frechet, J., and Poulikakos, D., "All-inkjet-printed flexible electronics fabrication on a polymer substrate by low-temperature high-resolution selective laser sintering of metal nanoparticles," Nanotechnology, Vol. 18, 345202, 2007. https://doi.org/10.1088/0957-4484/18/34/345202
  3. de Gans, B., Duineveld, P., and Schubert, U., "Inkjet Printing of Polymers: State of the Art and Future Developments," Advanced Materials, Vol. 16, pp. 203-213, 2004. https://doi.org/10.1002/adma.200300385
  4. Wang, Y., Boker, J., and Lee, A., "Maskless lithography using drop-on-demand inkjet printing method," Proc. SPIE 5374, Emerging Lithographic Technologies VIII, pp. 628-636, 2004.
  5. Kang, B., Lee, W., and Cho, K., "Recent Advances in Organic Transistor Printing Processes," ACS Applied Materials&Interfaces, Vol. 5, pp. 2302-2315, 2013. https://doi.org/10.1021/am302796z
  6. Sun, Y., Zhang, Y., Liang, Q., Zhang, Y., Chi, H., Shi, Y., and Fang, D., "Solvent inkjet printing process for the fabrication of polymer solar cells," RCS adv, Vol. 3, pp. 11925-11934, 2013.
  7. Scalisi, R., Paleari, M., Favetto, A., Ariano, P., Pandolfi, P., and Chiolerio, A., "Inkjet printed flexible electrodes for surface electromyography," Organic Electronics, Vol. 18, pp. 89-94, 2015. https://doi.org/10.1016/j.orgel.2014.12.017
  8. Quan, J., Saaem, I., Tang, N., Ma, S., Negre, N., Gong, H., White, K., and Tian, J., "Parallel on-chip gene synthesis and application to optimization of protein expression," Nature Biotechnology, Vol. 29, pp. 449-452, 2011. https://doi.org/10.1038/nbt.1847
  9. Lee, Y., "Development of a Paper Strain Gauge using Inkjet-printing Technology," Journal of the Semiconductor & Display Technology, Vol. 14, pp. 23-27, 2015. https://doi.org/10.5573/JSTS.2014.14.1.023
  10. Kwon, K., "Waveform Design Methods for Piezo Inkjet Dispensers Based on Measured Meniscus Motion," Journal of Microelectromechanical Systems, Vol. 18, pp. 1118-1125, 2009. https://doi.org/10.1109/JMEMS.2009.2026465
  11. Kwon, K., Kim W, "A waveform design method for high-speed inkjet printing based on self-sensing measurement," Sensors and Actuators A: Physical, Vol. 140, pp. 75-83, 2007. https://doi.org/10.1016/j.sna.2007.06.010
  12. Liu, Y., Pai, Y., Tsai, M., and Hwang, W., "Investigation of driving waveform and resonance pressure in piezoelectric inkjet printing," Applied Physics A, Vol. 109, pp. 323-329, 2012. https://doi.org/10.1007/s00339-012-7099-8
  13. Basaran, O., "Small-Scale Free Surface Flows with Breakup: Drop Formation and Emerging Applications," AlChE Journal, Vol. 48, pp. 1842-1848, 2004. https://doi.org/10.1002/aic.690480902
  14. Lopez, M., Sanchez, J., and Estrada, M., "Characterization of PEDOT:PSS dilutions for inkjet printing applied to OLED fabrication," 7th International Caribbean Conference on Device, Circuits and Systems, pp. 165-168, 2008.
  15. Kwon, K., "Experimental analysis of waveform effects on satellite and ligament behavior via in situ measurement of the drop-on-demand drop formation curve and the instantaneous jetting speed curve," Journal of Micro-mechanics and Microengineering, Vol. 20, 1105005, 2010.
  16. Alvin, U., and Basaran, O., "A new method for significantly reducing drop radius without reducing nozzle radius in drop-on-demand drop production," Physics of Fluids, Vol. 14, L1-L4, 2002. https://doi.org/10.1063/1.1427441
  17. Liu, T., Tsai, M., and Pai, Y., "Control of droplet formation by operating waveforms for inks with various viscosities in piezoelectric inkjet printing," Applied Physics A 111, pp. 509-516, 2013. https://doi.org/10.1007/s00339-013-7569-7
  18. Microfab Technote., "Report on waveforms for customer," Available at: http://www.microfab.com/technotes, 2006.