AUO was supposed to start producing 4" to 5" AMOLED panels in Q2 2012, but new reports say that AUO's yields are still very low (less than 20%) and so they have delayed mass production to Q3 2012. The same reports suggest that AUO got orders for 4.3" qHD AMOLED panels from HTC and is likely to get orders from Nokia as well.
AUO first AMOLED plant is a Gen-3.5 fab that has a monthly capacity of about 8,000 substrates. The company is also planning to later start producing at their Singapore Gen-4.5 fab (at AFPD). According to the new reports, the company was considering a 5.5-Gen AMOLED fab as well, but isn't likely to go ahead with that plan due to the low yields from the 3.5-Gen fab. Earlier reports suggested that AUO was considering a 6-Gen fab for large size panels (for OLED TVs).