Circuit design in organic semiconductor technologies

In this paper, we review the state of the art of digital and analog circuits that have been shown in recent years in organic thin-film transistor technology on flexible plastic foil. The transistors are developed for backplanes of displays, and therefore have the characteristics to be unipolar and to possess two gates. The dual-gate architecture is employed to increase the transistors intrinsic transconductance, and to create dual-V_T logic. We highlight recent examples of digital and analog plastic thin-film circuits. Furthermore, we give an outlook into new technological evolutions, including thin-film semiconductors with high mobility, the advent of complementary thin-film circuits, and of thin-film electrically re-programmable nonvolatile memory.