ALD technology protects a display's organic materials from oxygen and water, contributing to a longer life and performance of a flexible OLED panel.
According to etnews.com, LG Display has finished the research on ALD and ha started development to introduce the ALD technology into flexible OLED process, while Samsung Display is also working fast on introducing ALD technology.
Generally PECVD (Plasma-Enhanced Chemical Vapor Deposition), sputtering, and ALD technology can be used for inorganic thin-film encapsulation while Kateeva’s inkjet printing technology is used for organic thin-film deposition. Both Samsung Display and LG Display use the PECVD technology for forming inorganic thin films.
However, the companies are now turning to the ALD technology instead of PECVD in order to create larger flexible OLEDs, with a longer lifetime and performance.
The display industries have been avoiding introducing ALD since it costs more than PECVD and there are problems regarding application onto large areas and speed of deposition.
"..the speed of ALD deposition is approximately 10 times slower than PECVD," said a representative for an industry. "Although low productivity from low deposition speed and application onto large areas are the biggest obstacles, the possibility of actually introducing ALD technology is something to think about if it can form thin films with high quality even thinner."