A method for producing a document structure, wherein the method includes producing a chip structure by forming a cavity in a carrier having a top side and an under side, picking up a chip having at least one chip contact and a redistribution layer (RDL) connected to the at least one chip contact by means of a picking-up device detaching the chip from an auxiliary carrier, wherein the chip bears on the auxiliary carrier by way of the RDL, wherein the chip is lifted up from the auxiliary carrier by means of pressure being exerted on the RDL, wherein the lifted-up chip is picked up and inserted into the cavity, and wherein the RDL is oriented on the top side of the carrier, fixing the chip in the cavity by means of an adhesive, electrically conductively connecting the at least one chip contact of the RDL to an electrically conductive region of the carrier by means of an electrically conductive material, and embedding the carrier between a first paper layer and a second paper layer.

A security document (200) includes a secure substrate (205). The secure substrate includes a viewing side (209) and a backing side (211), and a micro-optic system (305, 321) providing an optically variable effect (OVE) (513) on the viewing side. The security document further includes a protective layer (225), and a mask layer (215) disposed between the protective layer and the backing side of the secure substrate.

A security document (200) includes a secure substrate (205). The secure substrate includes a viewing side (209) and a backing side (211), and a micro-optic system (305, 321) providing an optically variable effect (OVE) (513) on the viewing side. The security document further includes a protective layer (225), and a mask layer (215) disposed between the protective layer and the backing side of the secure substrate.

Provided is a method for securing a security document comprising at least personal data pages and a cover sheet placed outside the personal data pages, the method comprising, during security document manufacturing, a step of stitching the personal data pages and the cover sheet together by means of an upper thread and a lower thread interlaced together and a step of treating at least a part of the stitching with ultrasonic welding so as to structurally modify the thread.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

The invention adds a Physical Information Layer (“PIL”) to the magnetic particles within a matrix that creates an unclonable physical unclonable function “object.” The PIL assists in searching to find the combination that matches a pre-determined enrolled combination with additional information that includes a search index, which limits the range of data required to search in order to find a match in the enrolled database. The index could be a predetermined value that associates the random magnetic profile values to a list of enrolled values in a database. The additional information may include product or general information that needs to be easily communicated to a user of the PUF.

The invention adds a Physical Information Layer (“PIL”) to the magnetic particles within a matrix that creates an unclonable physical unclonable function “object.” The PIL assists in searching to find the combination that matches a pre-determined enrolled combination with additional information that includes a search index, which limits the range of data required to search in order to find a match in the enrolled database. The index could be a predetermined value that associates the random magnetic profile values to a list of enrolled values in a database. The additional information may include product or general information that needs to be easily communicated to a user of the PUF.

A method of inspecting a substantially transparent light control layer for an optically variable security device and a corresponding inspection apparatus, the substantially transparent light control layer including a surface relief defined by an array of substantially transparent refractive microstructures. The method includes: directing a beam of substantially collimated light towards a first region that is expected to contain the surface relief of the light control layer so as to generate an inspection light pattern; providing reference data that is indicative of a light control layer that meets a predetermined quality threshold; comparing the inspection light pattern with the reference data; and determining whether the light control layer meets the predetermined quality threshold based on the comparison.

A label, and methods and systems for preparing the label. The label includes a lens or lens array. The label includes at least one surface, a portion of which is embossed, and a lens array provided by the embossed portion of the at least one surface. The method includes applying a material to a substrate and contacting a surface of the material with a master engraving to provide an embossed region on a least a portion of the surface of the material, wherein the embossed region provides at least one lens.

A label, and methods and systems for preparing the label. The label includes a lens or lens array. The label includes at least one surface, a portion of which is embossed, and a lens array provided by the embossed portion of the at least one surface. The method includes applying a material to a substrate and contacting a surface of the material with a master engraving to provide an embossed region on a least a portion of the surface of the material, wherein the embossed region provides at least one lens.