Laser-Induced Graphene RF Tags for Authentication Applications

Laser-Induced Graphene RF Tags for Authentication Applications

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With the rapid growth of online transactions, there has been a significant increase in fraud involving pharmaceuticals, textiles, and food, among others.This work proposes the use of non-cloneable authentication tags for product brand protection, in which both the type of substrate used and its geometry are combined, resulting in read more a unique spectral response.These tags are manufactured in two phases, a first one that forms a laser-induced graphene (LIG) layer, and a second one, based on an electroplating process, which produces traces with variable sheet resistance depending on the manufacturing parameters.This technology can be carried out using a common laser (e.g.

CO2 laser) to merlin wizard costume directly convert various precursors (e.g.polyimide) into graphene materials.A prototype scanner designed to characterize the electromagnetic signature of the tags is presented.Preliminary results obtained with simple resonators and complex images show the feasibility of this technology.