Preparation and Characterization of Anti-reflective and Anti-static Double Layered Films by Sol-Gel Spin-Coating Method

졸-겔 스핀코팅법에 의한 반사방지 및 정전기방지 복층막의 제조 및 특성

  • 이준종 (연세대학교 세라믹공학과) ;
  • 최세영 (연세대학교 세라믹공학과)
  • Published : 1997.01.01

Abstract

Anti-reflective and anti-static double layered films were prepared on the VDT panel by sol-gel spin-coating method. Their electrical, opticla, and mechanical properties were investigated. The outer SiO2 film with low re-fractive index was coated over the inner ATO(Antimony-doped Tin Oxide)-SiO2 film which was prepared by mixing ATO sol with SiO2 at molar ratio of 68:32 to satisfy the interference condition of double layers. The heat treatment was conducted at 45$0^{\circ}C$ for 30 min where residual organics were completely removed. The sheet resistance of ATO single layer showed the minimum value of 6$\times$107$\Omega$/$\square$ at 3 mol% addition of Sb and that of SiO2/ATO-SiO2 increased slightly with increasing SiO2 mol% up to 30 mol%, and then increased steeply to the value of 3$\times$108$\Omega$/$\square$ at 32 mol%. The reflectance of double layered films was about 0.64% at the wavelength of 550nm and the transmittance increased about 3.20%. The hardness of double layered films was almost the same as that of uncoated VDT panel, 471.4kg.f/mm2.

졸-겔 스핀코팅법을 이용하여 VDT 기판에 반사방지 및 정전기방지 복층막을 코팅하고 코팅졸과 겔분말의 특성 및 코팅막의 전기적, 광학적, 기계적 특성을 조사하였다. 1층막은 복층막의 간섭조건을 만족시키는 굴절율을 얻기위해 투명 전도성 재료인 ATO(Antimony doped Tin Oxide) 졸과 SiO2 졸을 몰비 68:32로 혼합한 ATO-SiO2 복합졸을, 2층막에는 저굴절율의 SiO2 졸을 사용하였다. 각 코팅막을 45$0^{\circ}C$에서 30분간 열처리하였을 때 잔류 유기물은 완전히 제거되었다. ATO막의 표면저항은 3mol%의 Sb 첨가시 약 6$\times$107$\Omega$/$\square$로 최소를 나타내었고 SiO2 졸과의 혼합시 약 30mol% 까지는 표면저항이 완만히 증가하다가 그 이후에는 급격히 증가하는 경향을 나타내었으며, 간섭조건을 만족시키는 조성인 32mol%에서는 약 3$\times$108$\Omega$/$\square$를 나타내었다. 복층막의 반사율은 550nm의 기준파장에서 약 0.64%를 나타내었으며 광투과율은 약 3.20% 증가하였다. 복층막의 미소경도는 약 471.4kg.f/mm2로 코팅하지 않은 VDT기판의 경도와 유사한 값을 나타내었다.

Keywords

References

  1. SID 92 DIGEST A New Antireflective and Antistatic Double-layered Coating for CRTs Y. One;Y. Ohtani;K. Hiratsuka;T. Morimoto
  2. SID 92 DIGEST Hygroscopic Ion-induced Antiglare/antistatic Coatings for CRT Applications H.S. Tong;G. Prando
  3. SID 91 DIGEST An Antireflective and Antistatic Coating for CRTs Using Ultra-Fine Particles Yoshihige Endo;Masahiko Ono;Toshihiro Yamada
  4. SID 93 DIGEST A New Anti-static Anti-reflection Coating for CRTs Using Ultrafine Particles H. Kawamura;Y. Tomita;T. Kawamura;M. Miyazaki;K Kobara
  5. U.S.Patent 5,169,565
  6. High-Performance Glasses M. Cable;J.M. Parker
  7. J. Non-Cryst. Solids v.102 Transparent Conductors-A Status Review K. L. Chopra;S. Major;D. K. Pandya
  8. SID 94 DIGEST A color Display Tube with a High-contrast and Anti-reflection Coating M. Onodera;H. Matsuda;H. Mori;T. Ito
  9. SID 91 DIGEST Antireflection Coating for Inner Surface of CRT Faceplate T. Kawamura;H. Kawamura;K. Kobara
  10. 요업학회지 v.30 no.9 Sol-Gel침지법에 의한 SiO₂-TiO₂계 저반사 박막의 제조 및 특성 윤태일;최세영;이용근;이재호
  11. Sol-Gel Technology for Thin Films, Fibers, Preforms, Electronics, and Specialty Shapes L.C. Klein
  12. Thin Solid Films v.170 Chracterization of Tin Oxide Thin Films Deposited by Reactive Sputtering F. C. Stedile;B. A. S. De Barros, Jr.
  13. Thin Solid Films v.221 Optical Properties and Structure of Thermally Evaporated Tin Oxide Films D. W. Lane;J. A. Coath;K. D. Rogers;B. J. Hunnikin;H. S. Beldon
  14. Thin Solid Films v.164 Structural Properties of SnO₂:F Films Deposited by Spray Pyrolysis Technique Chitra Agashe;B R Marathe;M. G. Takwale;V. G.Bhide
  15. Thin Solid Films v.109 Thin Tin Oxide Films of Low Conductivity Prepared by Chemical Vapour Deposition J Melsheimer;D. Ziegler
  16. J. Non-Cryst. Solids v.100 Multilayer SiO₂and TiO₂Coatings on Glasses by Sol-Gel Process N.D.S. Mohallem;M.A. Aegerter
  17. Sol-Gel Science:The Physics and Chemistry of Sol-Gel Processing C J. Brinker;G. W. Scherer
  18. Ceramic Processing and Sintering M N. Rahaman
  19. J. Appl. Phys. v.66 no.11 Spin coating One-dimensional Model Bornside