How are P-OLED displays made?
One of the areas in which CDT has made good progress over the last decade is innovations in solution processing of P-OLED displays using inkjet and, more recently roll printing. Displays can be produced by ink-jet printing light emitting polymers onto a sheet of glass or plastic. As devices can be manufactured on flexible plastic substrates, it is likely to be possible to make displays that have non-planar shapes. Much of the clean room equipment required to manufactured P-OLEDs already exists in an LCD plant. In fact the manufacturing process for P-OLEDs offers simpler processes and potential cost savings compared with LCD: they do not have backlights or colour filters and need fewer process steps. The key difference is that a P-OLED display can be ink jet printed using conventional ink jet printing technology. CDT operates a 1,750 square meter US$42 million Technology Development Centre in Godmanchester, UK. It includes a 600 square metre state-of-the-art clean room comprising class
