A few days ago we reported that Kateeva says it has taken a "commanding lead" in the OLED thin film encapsulation (TFE) market with its ink-jet based systems. Kateeva's ink-jet printers are used to deposit organic materials, but the full TFE stack also contains in-organic materials.
Currently both LG and Samsung producers are using PECVD to deposit the in-organic materials, but according to a report from ETNEws, both Korean display makers are thinking about switching to ALD. Several companies, including Jusung Engineering, WONIK IPS, AP Systems and TES has ALD-based encapsulation deposition systems ready to be used in display production. Both LG and Samsung have finished with R&D work on ALD technology and are ready to introduce commercial systems into their production lines.
PECVD is more mature than ALD, and is also much faster, but ALD performs better (the resulting layers are more pure than PECVD deposited layers) and thus can enable more durable OLEDs with better performance.