Figure 4From: Transparent SiON/Ag/SiON multilayer passivation grown on a flexible polyethersulfone substrate using a continuous roll-to-roll sputtering systemFESEM images. Surface FESEM images of the top SiON layer in the SiON/Ag/SiON multilayer as a function of the SiON thickness. Top SiON layer surface with thicknesses of (a) 70, (b) 90, (c) 110, and (d) 130 nm, respectively.Back to article page