Novel Method for Fabricating Flexible Active Matrix Organic Light Emitting Diode (AMOLED) Displays

摘要

Recently, significant progress has been. made toward application of organic (small molecule/polymer) light-emitting diodes (OLEDs) in full color flat panel displays and other devices. However, current technologies for OLEDs in the market are still very limited, especially in terms of cost, size and flexibility. We believe fabricating OLED displays using roll-to-roll (R2R) manufacturing on plastic is the way to achieve low cost, light weight and flexibility. One of big challenges for fabricating flexible OLED displays is alignment on large area flexible substrates. We discuss here a proof-ofconcept HP proprietary solution to fabricate flexible active matrix OLED displays, which involves a process in which a well-defined micro OLEDs (uOLEDs) frontplane is directly laminated with our R2R processed active matrix flexible backplane built via self-aligned imprint lithography (SAIL) without any in-between alignment. A proof-of-concept AMOLED device has been built, which contains a flexible uOLEDs frontplane with OLED sizes of 50 μm on PET and active matrix backplane on polyimide with pixel pitches of 1 mm. Such alignment-free method offers great possibility to create large area interactive displays such as wall-paper type of displays with very low cost that no other technology today can achieve.