Researchers from Holst Centre, an open innovation initiative of imec and TNO, have demonstrated a new class of flexible, large-area sensor technology for detecting finger- and palm prints. At less than 0.2 mm thick and with no bulky prisms or moving parts, the new sensors can be embedded into objects such as mobile phones and door handles to create “invisible” yet secure access control systems that can tell if the print is from a living person rather than a phantom or counterfeit.   The techno...