Low resisitivity transparent electrodes for displays on polymer substrates

One of the main difficulties for manufacturing displays on polymer substrates is the deposition of low resistivity indium tin oxide (ITO). Most polymer materials do not withstand substrate temperatures above 200°C, which are required for conventional high quality ITO process on glass substrates. This is the reason why a solution is proposed which includes the substitution of a single ITO layer by a three layer system consisting of ITO/Ag/ITO. A sheet resistance below 16 Ω/□ at a transmittance over 80% at a 550-nm wavelength could be achieved. Additionally, the overall indium content in the coating is reduced. This will lead to a reduction of target costs during production.