ITRI says that the «key breakthrough in FlexUPD is its simultaneous adhesive and non-adhesive bonding» where a release layer sticks to
the production glass substrate during the whole of the fabrication process but is not stuck to the polyimide film that's stacked on top.
LG's new plastic EPD, claimed to be the world's first in mass
production, takes the form of a plastic
substrate that is 0.7 millimeters (0.027 in) thick, about 2/3 the thickness of
glass EPD devices.