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 essential in flexible displays, optical grade films, and thin-film solar cells. Designers of semiconductor polyimide materials look for low dielectric polyimide systems, electronic grade polyi... http://pandora.nla.gov.au/external.html?link=https://www.aurechem.com/boron-trifluoride-diethyl-etherate-bf3-oet2-properties-applications-safety-n.html