Why we are pursuing our own path to do this.
The requirements on the manufacture of organic films are extremely high. We are in a position to evaporate even difficult materials very efficiently.
Organic materials are expensive. They also react very sensitively to thermal stress. For this reason, one of the challenges is to vaporize as much material as possible at temperatures that are as low as possible. The more uniform the film, the more efficient and cost-effective production will be.
The vapor deposition method – an extremely sensitive process step in the manufacture of OLEDs.
AIXTRON is focused on the vaporization of small molecules in fine vacuum. In this process, the organic molecules are transported according to the gas-phase transport principle to very large areas, where they condense. This step is also called the vapor deposition method. The technology that we use for this is called Organic Vapor Phase Deposition (OVPD). Our technology has clear advantages compared to thermal vacuum vaporization, particularly in regard to the scalability of processes from the lab to mass production.
By combining Organic Vapor Phase Deposition (OVPD) with our tried and tested, patented Showerhead® technology, we achieve a method that is easily scalable – and it can therefore be used extremely flexibly for any substrate sizes. Using this production approach, customers achieve higher material yields at low temperatures.
The OVPD® technology was licensed exclusively by Universal Display Corporation (UDC), Ewing, N.J./USA, to AIXTRON for the construction of equipment. It is based on an invention by Professor Stephen R. Forrest et. al. at Princeton University, USA, which was in turn licensed exclusively to UDC. AIXTRON and UDC have jointly developed and enhanced an OVPD prototype for OLED manufacturing.
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