Inlays for security documents

摘要

Secure inlays for secure documents such as a passport comprising an inlay substrate may have laser ablated recesses within which a chip module is installed. Channels for an antenna wire may be formed in a surface of the substrate. Instead of using wire, the channels may be filled with a flowable, conductive material. Patches homogenous with the substrate layer may be used to protect and seal the chip and interconnection area. The inlay substrate may include two layers, and the antenna wire may be between the two layers. A moisture-curing polyurethane hot melt adhesive may be used to laminate a cover layer and the additional inlay substrate layers. The adhesive layer may include metal nanoscale powder and ink for electro-magnetic shielding. Additional security elements may include material that is optically changeable by an electro-magnetic field. Ferrite-containing layers may be incorporated in the inlay substrate.

主权项

1. A method of making a secure document comprising an inlay substrate, comprising:
providing the inlay substrate as at least two layers of a synthetic material laminated to one another with a layer of adhesive; and providing a recess for a chip module in the substrate; futher comprising: disposing ferrite particles in at least one of the layers.