Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Kai Uwe Stock

Johann Kecht

Stephan Steinlein

Thomas Giering

Stephan Heer

Gregor Grauvogl

Ulrich Scholz

Martin Stark

Thomas Happ

Rainer Hoppe

Sina Scholz-Riecke

A method for producing a data carrier includes a luminescent security element having at least two subregions, which at least do not completely overlap one another.

Method for producing a data carrier having a luminescent security element, and data carrier

A method is provided for producing a luminescent security marking on a substrate of a predetermined substrate type. The security marking includes a layer sequence applied on top of the substrate in a part region and formed from a diffuse reflectance printing ink applied on top of the substrate and from a luminescent printing ink applied on top of the diffuse reflectance printing ink, or a mixture of a diffuse reflectance printing ink and a luminescent printing ink. The layer sequence or the mixture exhibit visible luminescence after excitation. The layer sequence or the mixture are printed with a chosen layer thickness onto a substrate of the predetermined substrate type, in order to obtain a luminescent security marking, the luminescent spectrum of which matches the calculated combination spectrum in the part region on illumination with the excitation light. The invention also relates to an associated luminescent security marking.

Method for producing a luminescent security marking and luminescent security marking

A security feature for protecting valuable documents, in particular for ensuring the authenticity of valuable documents, comprises a luminescent pigment which has a host lattice doped with a first luminophore and a second luminophore, with an excitation energy of the first luminophore being transferable to the second luminophore. However, in the case of the luminescent pigment according to the invention, the excitation energy is not transferred completely from the first luminophore to the second, but rather only partially. The incomplete transfer of the excitation energy is achieved by selecting suitable amount-of-substance fractions of the first and the second luminophores on the luminescent pigment. As a result of the incomplete transfer of the excitation energy, the luminescent light that is emitted by the luminescent pigment also has, in addition to a luminescence peak of the second luminophore, a luminescence peak of the first luminophore.

Security feature

The invention concerns a method for marking a feature substance, present in particular in pulverized form, with at least one marker, with the feature substance being suitable for the authentication of value documents, comprising the step of mixing the feature substance with a small quantity of the marker present in the form of particles, so that the macroscopic detectability of the feature substance is not influenced by the marker and the marker is detectable in a value document having a security feature containing the marked feature substance by means of a spatially resolving analytical method which is adapted to resolve down to the single-particle level.

Method for marking a feature substance, security feature, document of value and method for verifying said document

The invention relates to a security feature having a luminescent substance with the general formula AXO: Z (I) or BXO: Z (II) or ABXO: Z (III), where A is an alkali metal, B is an alkaline earth metal, X stands for Nb or Ta, Z is the luminescence activator, and y lies between 0 and 0.5. The invention also relates to a security element, a security paper and a value document which is equipped with the security feature according to the invention, and to the use of the luminescent substance with the general formula (I), (II) or (III) as a feature substance for authentication. The luminescent substance is obtained by annealing solid starting materials.

Alkali metal and alkaline earth metal niobates and tantalates as security feature substances

A spectral luminescence standard has bismuth in a light-transmissive inorganic matrix material and emits light in the near infrared region upon irradiation with excitation light. The bismuth acts as a luminescence emitter in the near infrared region. A method includes manufacturing such a spectral luminescence standard and a calibration medium which has the spectral luminescence standard in or on a carrier material.

Spectral luminescence standard for the near infrared region

The invention relates to a security feature having a luminescent substance with the general formula AXO:Z (I) or BXO:Z (II) or ABXO:Z (III), where A is an alkali metal, B is an alkaline earth metal, X stands for Nb or Ta, Z is the luminescence activator, and y lies between 0 and 0.5. The invention also relates to a security element, a security paper and a value document which is equipped with the security feature according to the invention, and to the use of the luminescent substance with the general formula (I), (II) or (III) as a feature substance for authentication. The luminescent substance is obtained by annealing solid starting materials.

The invention relates to a security feature with a luminescent pigment which has a host lattice doped with a luminophore and which is optically excitable to emit luminescent light. The luminescent light of the luminescent pigment has a luminescence spectrum with a first luminescence peak and a second luminescence peak whose peak intensities respectively depend on an amount fraction x of the luminophore in the luminescent pigment. In the luminescent pigment according to the invention, the host lattice and the luminophore and the amount fraction x of the luminophore are chosen such that even a slight increase or reduction of the amount fraction x of the luminophore causes a strong relative change of the peak intensities Iand I. This increases the forgery-proofness of the luminescent pigment according to the invention.

A printed document of value having at least one authenticity feature in the form of a luminescent substance on the basis of host lattices which are doped with one or a plurality of ions. Since the host lattices are doped with different ions, exchange interactions between clusters of ions that occur leads to cooperative effects.

Authenticity mark in the form of a luminescent substance

A printed document of value has an authenticity feature in the form of at least two luminescent substances on the basis of host lattices which are doped with one or a plurality of ions. By systematically changing the host lattices and/or ions of the (nd)electron configuration a specific setting of the luminescence properties of luminescent substances is possible, the combination of which permits a multiplicity of complex new authenticity features.

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Grünwald, Germany

Kai Uwe Stock