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Figure of Merit for Deposition Conditions in ITO Films

  • Kim, H.H. (Electronic Department, Doowon Technology College) ;
  • Cho, M.J. (Department of Electrical Engineering, Chungbuk National University) ;
  • Park, W.J. (Department of Electrical Engineering, Chungbuk National University) ;
  • Lee, J.G. (Department of Electrical Engineering, Chungbuk National University) ;
  • Lim, K.J. (Department of Electrical Engineering, Chungbuk National University)
  • Published : 2002.06.01

Abstract

Indium tin oxide (ITO) films were deposited on unheated PET substrates by DC reactive magnetron sputtering of In-Sn (90-10 wt%) metallic alloy target. Electrical and optical properties of as-deposited films were systematically studied by control of the deposition parameters such as working pressure, DC power, and oxygen partial pressure. The figures of merit are important factors that summarize briefly the relationship between electrical and optical properties of transparent conducting films. The formulae of T/R$\_$sh/ and T$\^$10// R$\_$sh/ are expressed as a function of transmittance and sheet resistance. The best values of those figures of merit were approximately 38.6 and 8.95 ($\times$10$\^$-3/Ω$\^$-1/), respectively.

Keywords

References

  1. T. K-arasawa and Y. Miyata, 'Electhcal and optical properties of indium tin oxide thin films deposited on unheated substrates by d.c. reactive sputtering', Thin Solid Films, Vol. 223, P. 135, 1993 https://doi.org/10.1016/0040-6090(93)90737-A
  2. S. Ishibashi, Y. Higuchi, Y. Ota, and K. Nakamura, 'Low resistivity indium-tin oxide transparent conductive films. II. Effect of sputtering voltage on electrical property of films', J. Vac. Sci. Technol., Vol. A8, P. 1399, 1990
  3. T. Minami, H. Sonohara, T. Kakumu, and S. Takata, 'Physics of very thin ITO conducting films with high transparency prepared by dc magnetron sputtering', Thin Solid Films, Vol. 270, P. 37, 1995 https://doi.org/10.1016/0040-6090(95)06889-9
  4. W. Wu and B. Chiou, 'Deposition of indium tin oxide films on polycarbonate substrates by radio-frequency magnetron sputtering', Thin Solid Films, Vol.298, P.221, 1997 https://doi.org/10.1016/S0040-6090(96)09311-X
  5. B. Chiou, S. Hsieh, and W. Wu, 'Deposition of indium tin oxide films on acrylic substrates by radiofrequency magnetron sputtering', J. Am. Ceram. Soc., Vol. 77, P. 1740, 1994 https://doi.org/10.1111/j.1151-2916.1994.tb07044.x
  6. S. Knickerbocker and A. Kulkami, 'Calcula-tion of the figure of merit for indium tin oxide films based on basic theory', J. Vac. Sci. TechnoL, Vol. A13, P. 1048,1995
  7. D. Fraser and H. Cook, 'Highly conductive, transparent films of sputtered In2-xSnx03-y', J Electrochem. Soc.,Vol. 119, P. 1368, 1972 https://doi.org/10.1149/1.2403999
  8. R. Tahar, T. Ban, Y. Ohya, and Y. Takahashi, 'Tin doped indium oxide thin films: electrical properties', J. Appl. Phys., Vol. 83, P. 2631, 1998 https://doi.org/10.1063/1.367025
  9. W. Lee, T. Machino, and T. Sugihara, 'Low pressure and temperature deposition of transparent conductive indium tin oxide (ITO) films by the fac target sputtering (FTS) Process', Thin Solid Film Vol. 224, p. 105, 1993 https://doi.org/10.1016/0040-6090(93)90466-3
  10. G. Haacke, 'Electrical properties of tin-doped indium oxide films deposited by dc sputtering.', Appl. Phys., Vol. 47, p. 4086, 1976 https://doi.org/10.1063/1.323240
  11. C. Kumar and A. Mansingh, 'Effect of target substrate distance on the growth and properties (rf-sputtered indium tin oxide films', J. Appl. Phys., Vol. 65, p. 1270, 1989 https://doi.org/10.1063/1.343022
  12. J. Ma, S. Li, J. Zhao, and H. Ma, 'Preparation an properties of indium tin oxide films deposited on polyester substrates by reactive evaporation', Thin Solid Films, Vol. 307, p. 200, 1997 https://doi.org/10.1016/S0040-6090(97)00203-4
  13. L. Meng and M. dos Santos, 'Study of the effect (the oxygen partial pressure on the properties of reactive magnetron sputtered tin-doped indium oxide films', Applied Surface Science, Vol. 120, p. 243, 1997 https://doi.org/10.1016/S0169-4332(97)00224-9
  14. H. H. Kim and S. H. Shin, 'Optimal sputtering parameters of transparent conducting ITO filmsdeposited on PET substrates', Trans. on EEM, Vol, No. 2, p. 23, 2000