Wet-chemical processing of transparent and antiglare conducting ITO coating on plastic substrates

摘要

The paper reviews a low temperature sol-gel processing of transparent and antiglare conducting Sn doped indium oxide (ITO) coatings. The approach uses already crystalline nanoparticle which can be fully redispersed in an ethanolic sol containing a polymerisable organic binder. Thick single layers up to 600 nm can be deposited by spin and dip coating techniques followed either by a low temperature (< 130 deg C) heat treatment of by a UV light irradiation. Stable resistivity down to 9.5 X 10~(-2) OMEGAcm (sheet resistance of 1.7 kOMDA_(square) for a 560 nm thick layer) have been obtained, together with high visible transparency (T approx= 87%), good adhesion (DIN 58196-K2, and 53151) and abrasion resistance (DIN 58-196 G10 and H25) 1 H hardness. Irradiation through a mask allows to easily pattern the coatings. Antiglare-conducting coatings with adjustable glosss (60 to 80 GU) and maintaining a good optical resolution (> 8 linesm) were obtained by a conventional spraying technique. These techniques have been successfully applied to several plastic substrates such as polycarbonate (PC), polymethylemtacrylate (PMMA), polyimide, polyethylene (PE) as well as glasses.