Flexible polyimides are used in flexible circuits and roll-to-roll electronics, while transparent polyimide, additionally called colourless transparent polyimide or CPI film, has actually become important in flexible displays, optical grade films, and thin-film solar cells. Developers of semiconductor polyimide materials look for low dielectric polyimide systems, electronic grade poly... https://graph.org/Colourless-Transparent-Polyimide-CPI-Film-for-Flexible-Displays-and-Thin-Film-Solar-Cells-04-19