Researchers from Japan developed a new flexible display TFT based on carbon nanotubes (CNT), using a flexographic printing technology in ambient temperature and pressure. The carrier mobility is as high as 112cm2/Vs. The flexographic technology, while lower in precision compared to gravure printing, has a high throughput - much higher than screen printing or ink-jet printing.
The researchers used silver (Ag) nanoparticles for gate electrodes and source/drain electrodes, imide resin for gate dielectric films and CNTs for the channel layer of the TFT. Oxygen plasma is used for the CNT patterning and a printing technology is used to form a resist layer for it.