Korea-based OLUM Material announced that it is starting to develop fine metal masks (FMM) for 8.5-Gen (2200x2500 mm) OLED production. Current FMM technologies are limited to 6-Gen substrates (1500x1850 mm).
As demand for larger mobile OLED displays, for laptops, tablets and monitors is on the rise, OLED makers aim to start making these panels on larger substrates. Samsung Display is considering, according to reports, a 8.5-Gen AMOLED fab dedicated for laptop and IT displays.
Earlier this year OLUM revealed its Unit-Cell FMM Technology, which enables high-efficiency deposition (and patterning) of evaporated OLED materials. A few months ago OLUM said that its Unit-Cell FMM (also called uc-FMM) masks are suitable for substrate up to 6-Gen in size, but now it will be adapting it for 8-Gen substrates.
The basic idea behind Unit-Cell FMM is to use a small FMM mask unit in front of every display panel, rather than a large FMM in front of the entire substrate. A large mask is useful for very fast production, but the large masks tend to sag and deform and so FMM production is limited in size.