EP3828002A1 - Document de valeurs - Google Patents

Document de valeurs Download PDF

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Publication number
EP3828002A1
EP3828002A1 EP21152263.6A EP21152263A EP3828002A1 EP 3828002 A1 EP3828002 A1 EP 3828002A1 EP 21152263 A EP21152263 A EP 21152263A EP 3828002 A1 EP3828002 A1 EP 3828002A1
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EP
European Patent Office
Prior art keywords
value document
film
document according
plan
representation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21152263.6A
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German (de)
English (en)
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EP3828002B1 (fr
Inventor
Manfred Heim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Publication of EP3828002A1 publication Critical patent/EP3828002A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows

Definitions

  • the invention relates to a value document, such as a bank note, a check, a credit or other payment card, an identification card or the like, which has a front and a back, in plan view at least from the front shows a representation recognizable to the naked eye the plan view has certain dimensions and has a substrate body which has the certain dimensions in the plan view and is made up of at least one transparent film which also has the certain dimensions in the plan view, the representation recognizable from the front by a first, at least in sections metallized embossed structure is produced, which is arranged on one side of the first film and has a lateral, that is transverse to the plan view direction, a varying profiling and / or metallization.
  • a value document such as a bank note, a check, a credit or other payment card, an identification card or the like
  • the invention further relates to a document of value, such as a bank note, a check, a credit or other payment card, an identification card or the like, which has a front and a back, shows a representation that can be seen with the naked eye in a plan view at least from the front, has certain dimensions in the plan view and has a substrate body which has the certain dimensions in the plan view and is made up of a first and a second transparent film, which also have the certain dimensions in the plan view and which are connected to one another by an intermediate layer, so that inside of the foils face each other and outside of the foils away from the intermediate layer, the outside of the first foil facing the front side and the outside of the second foil facing the back side, the representation recognizable from the front side being generated by a first, at least partially metallized embossing structure is t that on the inside the first film is arranged, and laterally, that is, transversely to the plan view direction, has a varying profiling and / or metallization.
  • a document of value such
  • film-based security features e.g. B. holograms, optically variable elements and / or transparent windows can be used. They are produced on foil and later applied to the banknote paper. Foil elements give banknotes additional protection against forgery, but are difficult to register with the printed image and the watermark. In addition, there is the risk that foil elements become detached when a banknote is circulating.
  • WO 2016/096095 A1 a generic document of value is known which is composed entirely of a film body.
  • the film body consists of two films that are connected to one another via an intermediate layer.
  • the foils On the sides facing the intermediate layer, the foils each have sub-wavelength structures. All optical views that are presented by the value document are generated by these subwavelength structures. Other image-generating elements are deliberately excluded.
  • banknotes i. H. paper- or film-based documents of value
  • document of value is therefore understood here to the effect that it includes sheet-like documents of value, such as banknotes, checks, etc. in exactly the same way as comparatively rigid documents of value, e.g. B. Security, ID or payment cards.
  • the invention is based on the object of creating a value document in which film-based security elements can be easily combined with security elements that are generated by displaying images etc. Another object on which the invention is based is to create a document of value that has a particularly long life in circulation.
  • the invention provides a document of value that consists entirely of a film body.
  • the value document has certain dimensions in plan view.
  • the film body has the same dimensions in plan view.
  • a representation can be seen from the front. This is generated by a first embossed structure that is metallized at least in sections.
  • the embossed structure has a varying profiling and / or metallization transversely to the plan view direction.
  • the substrate body is made up of at least one transparent film and carries the first embossed structure on the the front of the film facing the front.
  • a second embossed structure that is metallized at least in sections is formed on a rear side of the film facing the rear side. At least one of the metallized embossed structures is covered with a leveling cover layer.
  • the embossed structure has microlenses, as are known for so-called moiré magnifiers.
  • the embossing structure can be in parts, i.e. H. in sections, be designed as a sub-wavelength structure and have a periodicity of 150 nm to 500 nm or be designed aperiodically with structure widths of 150 nm to 500 nm.
  • At least one opaque section is provided between the first and the second embossed structure. This can have a laterally structured opacity.
  • the substrate body is also made up of a second transparent film, which also has the specific dimensions when viewed from above.
  • the two foils are connected to one another via an intermediate layer, so that inner sides of the foils face one another and outer sides of the foils face away from the intermediate layer.
  • the outside of the first film points towards the front side, the outside of the second film towards the rear side of the substrate body.
  • the first metallized embossed structure is arranged on the inside of the first film and has microlenses or micromirrors.
  • the value document shows, in a top view from the rear, a further representation that can be seen with the naked eye.
  • This is produced by a second, at least partially metallized embossed structure which is arranged on the inside or outside of the second film.
  • This second embossed structure also has a laterally varying profiling and / or metallization, at least in sections.
  • the first and the second embossed structure form a window in opposite areas in which the representation through the first embossed structure is supplemented with the further representation through the second embossed structure in transparency to form a motif.
  • the first and second embossed structure in the area of the window can optionally have an asymmetrical profile and, in reflection, produce a motif that disappears in view.
  • the first embossed structure can be designed as a microstructure with a period of 500 nm to 2 ⁇ m in at least one area, which z. B. represents a hologram or an image with a tilt or movement effect.
  • the invention uses banknotes with a full surface structure which show a viewer a representation which is produced by embossing structures.
  • the conventional print image of a document of value for example a bank note, is reproduced by the embossed structure with the lateral variation of profile / periodicity.
  • the embossed structures offer the representation not only in specular reflection, but z. B. in a higher diffraction order, for example the first or further diffraction orders They are designed in such a way that the representation can be recognized over a wide viewing angle range that is almost or completely the same as that of a conventional print image.
  • the conventional printing process in banknote production is superfluous.
  • the embossed structure is covered in the first variant and is therefore robust against environmental influences.
  • the second variant it lies in the interior of the substrate body.
  • all desired security features such as holograms, micromirrors, etc. can be produced in a single embossing step.
  • overhead / see-through effects can easily be implemented in windows.
  • the production of the value document is thus significantly simplified.
  • the appearance of the first order of diffraction increases the security against forgery compared to conventional banknotes.
  • the representation is generated by the embossed structure which is arranged on the film which is at the top in the viewing direction and there on the inside.
  • the intermediate layer In order to avoid an effect from the film lying at the bottom in the viewing direction, it is preferable for the intermediate layer to be opaque at least in sections. In the sections provided with an opaque intermediate layer, the representation is then brought about exclusively by the embossed structure on the film lying at the top in the viewing direction. It is of course possible to structure the intermediate layer laterally with regard to its opacity, for example in order to create a conscious interaction between the top and see-through effects.
  • both foils are provided on their insides with metallized embossed structures with microlenses and / or micromirrors, ie the document of value also shows a further representation recognizable to the naked eye from a top view from the rear, which is represented by a second, at least partially metallized Embossed structure is generated, which is arranged on the inside of the second film and which is designed at least in sections as a subwavelength structure with laterally varying profiling and / or periodicity.
  • the outside of the second film forming the rear side and the rear side of the intermediate layer facing the second side are preferably free of imprints that contribute to the broad representation.
  • a value document configured in this way then generates a representation exclusively through the embossed structure both on the front side and on the back side.
  • a value document designed in this way also no longer requires a printing process during production.
  • the first and second embossed structure form a window in opposite areas.
  • the metallization of the embossed structures is relevant for this window.
  • Metallization is preferably not provided in the window area. This can be achieved in that the metallization is not applied in the window area from the beginning or that a metallization is subsequently removed again in the window area, for example by ablation with a laser or the use of a so-called wash color. Both means are known to the person skilled in the art from the prior art.
  • the intermediate layer and / or cover layer can consist of a dielectric with which the insides of the foils are laminated.
  • the value document can be design as a so-called hybrid value document, for example as a hybrid bank note, if the intermediate layer comprises a bank note paper.
  • a banknote paper that has a watermark, the embossed structures forming a window in the area above the watermark. This will make the watermark visible through the window.
  • a colored effect of the representation can be achieved in that there is a layer of color on the foil or foils or the foil is / are colored.
  • the intermediate layer can be colored.
  • Bank notes are examples of documents of value that are individualized. They have a serial number.
  • this serial number can be generated particularly easily in that, for example, the metallization in a pattern is omitted or subsequently removed so that the value document is individualized in the process. It is therefore preferred that the metallization is omitted or removed in a pattern that individualizes the value document, in particular in a pattern that represents a serial number.
  • metallization is to be understood as a coating which consists of metal or which contains metal.
  • Layer structure possible, which consist of a composite layer with metal inclusions. However, it can also consist of a multilayer structure in which one or more layers are metallic.
  • direct exposure techniques e.g. B. with the help of a laser writer in question.
  • the original of the embossed structure is written into a substrate coated with photoresist by direct exposure with the aid of a laser writer, and the exposed portion of the photoresist is then removed.
  • More complex processes for original production such as electron beam or “focused ion beam” exposure processes, allow the embossed structure to be designed in a particularly fine manner.
  • the original exposed in this way can then be electroformed and thus an embossing stamp can be produced as a master, with which an embossing cylinder is produced for embossing a film web.
  • the structure is replicated via an embossing process, for example in UV varnish on foil or directly (e.g. by hot embossing in the surface of the foil).
  • a nanoimprint process can be used.
  • the embossed film surface is then metallized, e.g. B. with a reflective layer and / or a color effect causing structure, z. B. an interference layer structure, and / or a color layer, z. B. a Color-Fix coating. Electron beam vapor deposition, sputtering or thermal evaporation in a vacuum, among others, are possible for this purpose. Finally, the film is laminated together with the intermediate layer.
  • Fig. 1 shows schematically a banknote 1 which is surface-structured over the entire surface with an embossed structure and which is constructed from a substrate body 2 which has a height H and a width B.
  • the substrate body 2 is provided with an embossed structure on inner surfaces, which z. B. provides micromirrors and / or microlenses at least in sections.
  • the embossed structures are formed on both sides of the same film. Both are explained below using the sectional views of Figures 2 to 5 , which show different embodiments for the embossed structure, explained in more detail.
  • the bank note 1 which is an example of a value document, presents a viewer from the front, which is shown in Fig. 1 is shown, a representation 3 ready, as is usual for bank notes.
  • the representation 3 can include, for example, a graphically designed background 4, a moiré image 5, a hologram 6, a value indication 7 and a serial number 8. It is also possible to provide a window 19 in which the bank note is partially transparent. See-through effects can be present in window 19, for example, ie a motif visible on the front is complemented by a motif visible on the back when looking through to form a further motif.
  • the substrate body 2 with the height H and the width B is made up of at least one film of the same dimensions as the sectional views of FIG Figs. 2 to 4 , which show embodiments for the bank note 1, can be seen in more detail.
  • the sectional views of the Figures 2 to 4 differ with regard to the embodiment of the banknotes. What they have in common is that an embossed structure is provided which, in some variants, includes microlenses.
  • the substrate body comprises two foils, in the embodiment of FIG Fig. 5 a slide.
  • the substrate body 2 comprises a first film 11, the outwardly facing surface of which forms the front side 9, and a second film 12, the outside of which forms the rear side 10.
  • a dielectric 13 is located as an intermediate layer between the first foil 11 and the second foil 12.
  • a first embossed structure 14 is formed on the inside of the first film 11 and a second embossed structure 15 on the inside of the second film 12.
  • the embossed structures are designed with a laterally varying structure and / or metallization. In detail, depending on the embodiment, they comprise a different selection of microlenses 16 which interact with a microimage structure 18 arranged in an intermediate layer 17 and, for example, form a known moiré magnifier in order to generate the moiré image 5. Furthermore, a hologram structure or other microstructure 24 can be provided in the embossed structure 14. It is also possible to use a Form mirror structure 20, which consists of differently inclined micromirrors and thus creates a tilting effect.
  • the embossed structures can also have subwavelength structures 21 with a laterally varying profile and / or laterally varying periodicity. Details for the implementation of the subwavelength structure can be found in the literature references already mentioned: DE 102011115589 A1 , WO 2012/156049 A1 , WO 2014/023415 A1 , DE 102009012300 A1 , Y. Yu, L. Wen, S. Song, and Q. Chen, "Transmissive / Reflective Structural Color Filters: Theory and Applications," Journal of Nanomaterials, vol. 2014, Article ID 212637, 17 pages, 2014. doi: 10.1155 / 2014/212637 and H. Lochbihler, "Colored images generated by metallic subwavelength gratings," Opt. Express 17, 12189-12196 (2009 ). With regard to the structure of the subwavelength structures, the disclosure content of these publications is fully incorporated here.
  • the structure of the microstructures 24 further differs from the subwavelength structures 20, which have structure widths in the range of the light wavelength.
  • the microstructures 24 are significantly longer (from 0.6 microns) and produce z. B. diffractive effects, while the subwavelength structures cause interference effects of the light waves.
  • the various embossed structures can be selected depending on the embodiment and the desired design for the bank note 1.
  • the in Fig. 2 The assignment made to the foils 11 and 12 is purely exemplary.
  • embossed structures For many embossed structures it is necessary that the embossed structures are metallized in order to create an effect or an image. In the area of the window 19, this metallization has been removed again after application or not available from the start. The distance can e.g. B. be done with the help of a laser or using a wash dye. The same applies to an individualization of the bank note 1 by the serial number 8, which is also produced by an individual removal of the metallization.
  • the first embossed structure 14 on the inside of the first film 11 is visible when viewed from the front side 9 and forms the representation 3, so z. B. both the background 4, as well as the image 5 and the value 7 - either alone or in conjunction with conventional printed images on the outside of the film.
  • the hologram 6 is z. B. generated by an area of the embossed structure which has a suitable periodicity. As is known, holograms are formed by grating areas or microstructures with periods of 0.6 to 2 ⁇ m.
  • the first and second films 11 and 12 are transparent. They are preferably each a plastic film.
  • the foils 11 and 12 are embossed with the embossed structures 14 and 16 and then provided with the metallization, for example by a vapor deposition process.
  • the two foils are then connected to one another via the intermediate layer that forms the dielectric 13, for example by lamination.
  • the dielectric 13 can preferably be a polymer.
  • the outer surfaces of the foils 11, 12 are provided with a matting, for example in the form of a coating, in embodiments not shown in detail which creates a slightly scattering surface.
  • the intermediate layer 17 In order to prevent the embossed structure 15 on the second film from shining through when viewed from the front, it is preferable to configure the intermediate layer 17 to be opaque. This shows Fig. 3 .
  • the opacity of the material between the embossed structures 14 and 15 ensures that when the front side 9 is viewed, only the embossed structure 14 contributes to the display, and when viewed from the rear side 10, only the embossed structure 15.
  • the opacity can be achieved, for example, by an opaque intermediate layer 17, preferably an opaque white or a colored adhesive layer or lamination layer can be implemented.
  • the opaque layer 17 can be provided with a locally varying opacity.
  • the opaque layer 17 is of course interrupted in this area by a transparent window 23, as is the case Fig. 4 shows.
  • Fig. 5 shows an embodiment with only one film 11, which is provided with the embossed structures 14, 15 on both sides. At least one of the embossed structures is covered with a cover layer 22, which levels the top.
  • a cover with an equalizing cover layer is disadvantageous, since the lens effect could be destroyed. Equalization is possible if reflective lenses, i.e. micro-concave mirrors, are used.
  • the embossed structures are preferably produced in one operation in a double embossing system.
  • the production of the value document comprises the following steps: First, the relief structure for an original is generated with the dimensions of the value document, for example with the height H and the width B of the bank note 1. This relief structure is generated, for example, by means of a laser writing process or a mask process in a photoresist. A stamp is then produced as a master from the original structure, for example by copying the relief structure into a nickel mold by means of galvanic molding or into a photopolymer. With the help of this stamp, an embossing cylinder is now produced which reproduces the relief structure of the original on the surface of the embossing cylinder.
  • the usual steps for producing an embossing cylinder are the galvanic molding of a replica in nickel and mounting the structured nickel foil on an embossing cylinder.
  • the original structure is then molded into the film in a continuous process on a plastic film web, many times next to one another in UV varnish or by means of a hot embossing process.
  • the film web embossed in this way contains lines transverse to the web direction in which several areas of width B and height H lie next to one another. The lines are repeated along the length of the film.
  • the foil web embossed in this way is then coated with a thin metal layer, preferably aluminum, silver, chromium, copper, gold or alloys thereof.
  • Semimetal layers for example silicon, germanium, carbon and silicon oxide (preferably with an Si: O ratio of less than one) can also be used.
  • High vacuum vapor deposition by means of vapor deposition or sputtering or other coating processes are suitable as coating processes.
  • these are then on their insides, i. H. those sides which contain the metallized embossed structures connected.
  • An internal substrate for example banknote paper, can also be laminated on.
  • the bank notes 1 produced in this way are then separated by cutting.
  • demetallized areas or a window takes place before the two foils are joined. For example, it is possible to print a wash color on the film webs at the appropriate places where windows will later be located before the metallization is carried out. After the metallization, the material and the color are removed by a washing process, as is known to the person skilled in the art. Alternatively, the metallization can be removed by exposure to suitable laser radiation. In this way, the serial numbers 8 can also be incorporated into the film; the material is preferably removed on one side in a pattern corresponding to the serial number 8. The contrast is created later by looking at the inside of the rear film or the inside substrate or dielectric.
  • the matting can be produced on the film web by laminating a scattering layer onto the outside or by plasma melting the film surface.

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EP21152263.6A 2017-12-19 2018-12-19 Document de valeurs Active EP3828002B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102017130588.2A DE102017130588A1 (de) 2017-12-19 2017-12-19 Wertdokument
PCT/EP2018/085916 WO2019121965A2 (fr) 2017-12-19 2018-12-19 Document de valeurs
EP18829824.4A EP3727871B1 (fr) 2017-12-19 2018-12-19 Document de valeurs

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EP18829824.4A Division-Into EP3727871B1 (fr) 2017-12-19 2018-12-19 Document de valeurs
EP18829824.4A Division EP3727871B1 (fr) 2017-12-19 2018-12-19 Document de valeurs

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EP3828002A1 true EP3828002A1 (fr) 2021-06-02
EP3828002B1 EP3828002B1 (fr) 2023-06-14

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CN (1) CN111511570B (fr)
DE (1) DE102017130588A1 (fr)
WO (1) WO2019121965A2 (fr)

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DE102021002600A1 (de) 2021-05-18 2022-11-24 Giesecke+Devrient Currency Technology Gmbh Wertdokument und Verfahren zur Herstellung eines Wertdokuments
DE102022001749A1 (de) * 2022-05-18 2023-11-23 Giesecke+Devrient Currency Technology Gmbh Wertdokument und Verfahren zur Herstellung eines Wertdokuments

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Y. YUL. WENS. SONGQ. CHEN: "Transmissive/Reflective Structural Color Filters: Theory and Applications", JOURNAL OF NANOMATERIALS, vol. 2014, 2014, pages 17

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WO2019121965A3 (fr) 2019-08-15
EP3727871B1 (fr) 2024-05-22
WO2019121965A2 (fr) 2019-06-27
CN111511570A (zh) 2020-08-07
CN111511570B (zh) 2021-11-23
EP3828002B1 (fr) 2023-06-14
EP3727871A2 (fr) 2020-10-28
DE102017130588A1 (de) 2019-06-19

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