According to reports from Korea, Samsung has started construction of a new flexible OLED fab, which will be called the A4 line. This will be Samsung's first Gen-7 line as the company is aiming to expand its technology gap over its upcoming OLED competitors who are all building Gen-6 line.
A Gen-7 line substrate is 1870x2200 mm in size - as opposed to 1500x1800 mm for Gen-6. This means that you can produce more displays per substrate and price per screen is lower. Scaling up evaporation OLED production is not so easy, but it seems that Samsung managed to solve its technologies hurdles - mainly the FMM metal masks and the LTPS annealing process.