Patent ID: 11889004
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A physically uncloneable function, PUF, film comprising a layer stack, the layer stack comprising: a film substrate, a printed dielectric layer comprising a varying layer thickness in the dielectric layer and a structured electrode layer being arranged at the dielectric layer, wherein the structured electrode layer is influenced with respect to an electric measurement value due to the variable thickness;
wherein the structured electrode layer is a first structured electrode layer, wherein between the film substrate and the dielectric layer at least a part of a second structured electrode layer is arranged, wherein the dielectric layer is printed onto the second structured electrode layer such that the dielectric layer covers the second structured electrode layer in a first region and does not cover the second structured electrode layer in a second region, wherein a material edge of the dielectric layer extends between the first region and the second region, wherein the first structured electrode layer is arranged in the first region and in the second region such that the first structured electrode layer extends over the material edge and is spaced from the second structured electrode layer in the first region by the dielectric layer and is galvanically connected to the second structured electrode layer or arranged in a common plane with the second structured electrode layer in the second region;
wherein the first structured electrode layer and the second structured electrode layer are arranged such that the first structured electrode layer and the second structured electrode layer are connectable in a common connector layer.