Films were etched with narrow, clean and well-defined ‘‘V’’ shaped interpixel grooves, having entrance windows of 15 lm, reducing to 1 lm at the bottom as shown in Fig. 2.
Films were etched with narrow, clean and well-defined ‘‘V’’ shaped interpixel grooves, having entrance windows of 15 lm, reducing to 1 lm at the bottom as shown in Fig. 2.