Where is the SiO2 passivation layer located and what is it good for?
The SiO2 layer is located between the glass substrate and the ITO-thin film. In other words, it separates the Indium Tin Oxide from the glass surface. This quartz layer is only some tens of nanometers thick and increases the electrical insulation. At the same time it minimizes leaching of alkali-oxides from the glass into liquid crystals, which is critical for display applications. Only our CEC S and CEC P coatings have a SiO2 passivation layer. All other coatings do not have a passivation layer. The SiO2 layer does NOT add any extra cost to our ITO-coated end product as it is an integrated process.
