Self-Aligned Organic Thin-Film Transistors Employing UV-Curable Conductive Paste as a Source/Drain Electrode

In this paper, we propose the printed and self-aligned method for organic thin-film transistors. Source/drain electrodes were composed of UNT-curable silver paste and were fabricated by using the screen printing process. The curing was performed by using a rear-side exposure with the gate electrodes as the photomask while the un-exposed channel area was formed by using the development process. Since the source/drain electrode was self-aligned in accordance with the gate electrode, the overlap capacitance and resistance were minimized. Fabrication was characterized by using the printing process, thereby allowing for roll-to-roll production.