WO2020088791A1 - Élément de sécurité et support de données équipé de l'élément de sécurité - Google Patents

Élément de sécurité et support de données équipé de l'élément de sécurité Download PDF

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Publication number
WO2020088791A1
WO2020088791A1 PCT/EP2019/025352 EP2019025352W WO2020088791A1 WO 2020088791 A1 WO2020088791 A1 WO 2020088791A1 EP 2019025352 W EP2019025352 W EP 2019025352W WO 2020088791 A1 WO2020088791 A1 WO 2020088791A1
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WO
WIPO (PCT)
Prior art keywords
thin
film element
viewed
layer
color
Prior art date
Application number
PCT/EP2019/025352
Other languages
German (de)
English (en)
Inventor
Christian Schmitz
Original Assignee
Giesecke+Devrient Currency Technology Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giesecke+Devrient Currency Technology Gmbh filed Critical Giesecke+Devrient Currency Technology Gmbh
Priority to EP19795455.5A priority Critical patent/EP3873749B1/fr
Priority to CN201980069287.4A priority patent/CN112888574B/zh
Publication of WO2020088791A1 publication Critical patent/WO2020088791A1/fr

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Classifications

    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • 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
    • 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
    • B42D25/355—Security threads
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/445—Marking by removal of material using chemical means, e.g. etching
    • 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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • 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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives

Definitions

  • the invention relates to a security element for securing
  • Carrier substrate provided with thin-film element.
  • the invention further relates to a data carrier with such a security element.
  • Data carriers such as documents of value or identity documents, or others
  • Valuables such as branded goods, are often provided with security elements for security purposes, which allow the authenticity of the data carrier to be checked and which at the same time protect against unauthorized use
  • the security elements are equipped with optically variable elements that differentiate the viewer
  • Viewing angles convey a different image impression and, for example, depending on the viewing angle, show a different color or brightness impression and / or a different graphic motif.
  • the color shift effect is based on the viewing angle
  • the path difference of the light reflected from the different layers depends on the one hand on the optical thickness of a dielectric spacer layer, which is the distance between one defines semi-transparent absorber layer and a reflection layer, and on the other hand varies with the respective viewing angle. Since the
  • Path difference is in the order of magnitude of the wavelength of visible light, because of the extinction and amplification of certain wavelengths there is an angle-dependent color impression for the viewer.
  • a suitable choice of material and thickness of the dielectric spacer layer enables a large number of different color shift effects to be designed.
  • security elements with multilayer thin-film elements which, when viewed in incident light, i.e. appear in reflection, in a first color and when viewed in
  • WO 2011/082761 A1 also describes a thin-film element
  • Multi-layer structure that appears golden when viewed in incident light and blue when viewed in transmitted light.
  • the multilayer structure is based on two semi-transparent mirror layers and a dielectric spacer layer arranged between the two mirror layers.
  • the invention is based on the object
  • security element for securing documents of value, comprising a carrier substrate which is provided with a first thin-film element and a second thin-film element, the first thin-film element being a color-shifting thin-film element which conveys a different color impression to a viewer at different viewing angles, and the second
  • Thin-film element is a semitransparent thin-film element that gives a viewer a different color impression when viewed in reflected light and when viewed in transmitted light, the first thin-film element and the second thin-film element being arranged on the carrier substrate such that the second thin-film element in the form of characters, in Form in the form of a pattern or in the form of a coding and the first thin-film element represents a background.
  • security element according to clause 1, wherein the carrier substrate in addition to the first region formed by the first thin-film element and the second region formed by the second thin-film element also has a third region, which is either metallic shiny or transparent and in the form of Character, in the form of a pattern or in the form of a coding, wherein the first thin-film element represents a background.
  • Color impression conveys, (i) is formed by means of an effect pigment producing an angle-dependent color impression, or (ii) a multilayer Thin-film element, comprising a reflection layer, a dielectric spacer layer and a semi-transparent absorber layer.
  • security element according to one of clauses 1 to 3, the second, semitransparent thin-film element, which conveys a different color impression to an observer when viewed in incident light and when viewed in transmitted light, (i) on the basis of an effect pigment composition which, when viewed in incident light, shows a different color than when viewed in transmitted light, or (ii) is a multilayer thin-film element comprising two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.
  • Color impression conveys a multi-layer thin-film element, comprising a reflection layer, a dielectric spacer layer and a semi-transparent absorber layer, and the second,
  • Thin-film element comprising two semi-transparent metallic
  • Color impression conveys, by means of an angle-dependent color impression producing effect pigments, and the second, semitransparent thin-film element, which gives a viewer a different view when viewed in reflected light and when viewed in transmitted light
  • Color impression conveys, based on an effect pigment composition, which when viewed in reflected light has a different color than that of
  • security element according to clause 7, the security element having the following layer sequence: - an optional protective lacquer layer;
  • security element according to one of clauses 1 to 8, the second, semitransparent thin-film element, which gives a viewer a different color impression when viewed in incident light and when viewed in transmitted light, in which
  • security element according to one of clauses 1 to 9, the security element being a security thread
  • security element according to clause 10, wherein the security element is a security thread, namely a window thread, with areas provided for embedding in a document of value substrate and window areas visible to the viewer, the first
  • Thin-film element and the second thin-film element are particularly suitable for arrangement in the window areas.
  • security element according to one of clauses 1 to 11, the security element in the area of the second,
  • semitransparent thin-film element which conveys a different color impression to an observer when viewed in incident light and when viewed in transmitted light, additionally has a color layer applied by printing technology, in particular a color layer based on platelet-shaped metal pigments.
  • the second thin-film element is arranged to overlap, preferably at least the second thin-film element, particularly preferably both the first
  • Security element is a window thread with within the
  • the data carrier is a document of value, such as a banknote, in particular a paper banknote.
  • viewing in incident light is illuminating the data carrier from one side and viewing the data carrier from the same side. An observation in the real state is thus, for example, when the front of the data carrier is illuminated and also viewed.
  • An observation in transmitted light is thus, for example, when the back of the data carrier is illuminated and the front of the
  • Disk is considered. The light shines through the disk.
  • the disk substrate of the disk e.g. a documentary value substrate, such as a banknote substrate
  • a paper substrate or a paper-like substrate is in particular a paper substrate or a paper-like substrate, a polymer substrate, a paper / film / paper composite substrate or a film / paper / film composite substrate.
  • a windowed security document or security paper may e.g. in the case of a paper substrate, a paper / film / paper composite substrate or a film / paper / film composite substrate by means of a continuous recess within the paper layer (s).
  • Paper layer (s) can be produced, for example, by means of punching or by means of laser radiation.
  • the paper layer can be made using a suitable Liquid, eg using an aqueous sulfuric acid solution, in one
  • a window area e.g. by means of congruent cutouts in the opaque areas on the front and back of the polymer substrate
  • Print layers are generated.
  • the carrier substrate for example a film, such as a polyethylene terephthalate film
  • a (UV) embossing lacquer layer before the semitransparent thin-film element and / or the color-shifting thin-film element are applied thereon.
  • the (UV) embossing lacquer layer advantageously has an embossed one Relief structure, for example a microstructure and / or a nanostructure. In this way, optically variable structures, such as diffractive structures or hologram structures or micromirror arrangements, can be achieved.
  • the semi-transparent thin-film element which has a color change when viewed in incident light on the one hand and when viewed in transmitted light on the other hand, is based on e.g. on a multilayer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.
  • a multi-layer structure which appears golden when viewed in incident light and shows a blue hue when viewed in transmitted light, is e.g. from WO 2011/082761 Al known.
  • the two semitransparent metallic layers are preferably chosen from Al or Ag; the dielectric layer is in particular an Si0 2 layer or an MgF 2 layer, preferably an Si0 2 layer;
  • the respective preferred layer thickness is in a range from 5 nm to 20 nm, particularly preferably in a range from 10 nm to 14 nm;
  • the dielectric Si0 2 layer preferably has a layer thickness in a range from 50 nm to 450 nm, more preferably in a range from 80 nm to 260 nm and particularly preferably in a range from 210 nm to 260 nm, the ranges from 80 nm up to 100 nm and from 210 nm to 240 nm are particularly preferred for the provision of a gold / blue color change; in the event that each of the two semitransparent metallic layers is based on Ag, the respective preferred layer thickness is in a range from 15 nm to 30 nm, particularly preferably from 15 nm to 25 nm; the dielectric Si0 2 layer preferably has a layer thickness in a range from 50 nm to 450 nm, more
  • the above-mentioned multilayer structures with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers can have a symmetrical three-layer structure, in which both the material and the layer thickness of the two semitransparent metallic layers
  • Layers are identical. Alternatively, however, there can also be an asymmetrical three-layer structure in which the material and / or the
  • Layer thickness of the two semitransparent metallic layers are different, e.g.
  • Layer thicknesses of the silver layer and the aluminum layer are identical or different;
  • the above-mentioned multilayered layer structures not only enable the production of a semi-transparent functional layer, which also applies to Viewing in incident light appears golden and shows a blue hue when viewed in transmitted light, but depending on the choice of layer thickness, especially the dielectric layer, further color changes can be generated, for example
  • the semi-transparent thin-film element which on the one hand has different colors when viewed in incident light and on the other hand when viewed in transmitted light, can also be used on one
  • Effect pigment composition based.
  • the end-to-end pigments preferably have a longest dimension of edge length in a range from 15 nm to 1000 nm and are based on a transition metal selected from the group consisting of Cu, Ag, Au, Zn, Cd, Ti, Cr, Mn, Fe, Co, Ni, Ru, Rh,
  • the transition metal is preferably Ag.
  • the aspect ratio i.e. the ratio of the longest end-to-end dimension to the thickness
  • the aspect ratio is preferably at least 1.5, especially in a range of 1.5 to 300.
  • Metal pigment is preferably below 10: 1, in particular below 5: 1.
  • the color can be adjusted when viewing the print layer in transmission and the color when viewed in reflection (e.g. blue in transmission and silver, gold, bronze, copper or violet in reflection; also violet, magenta, pink, Green or brown in transmission and different colors in reflection, which depend on the choice of pigment / binder ratio).
  • Colors with gold / blue color changes between reflection and transmission are mentioned, for example, in Examples 1, 2 and 3 in Table 1 of WO 2011/064162 A2.
  • example 4 shows a color with gold / violet color change, example 5 a color with green-gold / magenta color change, example 7 a color with violet / green color change and example 8 a color with silver / opaque color change.
  • the color-shifting thin-film element which produces an angle-dependent color impression, can e.g. printing technology using a
  • effect pigments generating angle-dependent color impression are formed. Suitable for this are e.g. Interference pigments, pearlescent pigments, metallic effect pigments or liquid crystal pigments.
  • the color-shifting thin-film element which produces an angle-dependent color impression, can also be e.g. can be obtained by vapor deposition multilayer thin-film element, the one
  • Reflection layer e.g. Al
  • dielectric spacer layer e.g. Si0 2
  • semi-transparent absorber layer or partially transparent layer, e.g.
  • Such a multi-layer structure capable of interference is known, for example, from WO 2005/038136 A1 and WO 2017/194189 A1 and, due to its mode of action, is also known as
  • the color impression changes with the viewing angle, for example from gold to green, from green to blue, from blue to magenta or from magenta to green.
  • the color spectrum obtained can be broadened by additional, printed, semitransparent color layers, for example a magenta-green color-shifting layer structure obtainable by means of PVD, overcoated with "CIBA® ORASOL® Yellow 4GN", a red-green color-shifting structure
  • the security element according to the invention can e.g. be designed as a laminate film, in particular in the form of a patch or label or in the form of a strip.
  • the laminate film can then be applied to a value document substrate, e.g. a banknote.
  • a window or a cutout in the value document substrate can be closed in this way.
  • the security element according to the invention can be in the form of a security thread, in particular a window thread, with areas provided for embedding in a document of value substrate and window areas visible to the viewer, the first thin-film element and the second thin-film element being particularly suitable for arrangement in the window areas.
  • the security element according to the invention can additionally be equipped with magnetic and / or fluorescent security features.
  • the security element according to the invention can furthermore, for example in the area of the second, semitransparent thin-film element, which gives a viewer a different color impression when viewed in incident light and when viewed in transmitted light, in terms of printing technology have applied color layer, in particular one
  • Color layer applied by printing can be in particular in the form of characters or in the form of a pattern or coding.
  • the color layer can be designed in such a way that it is not perceptible to the viewer in reflected light, but when viewed in transmitted light.
  • the printing ink based on platelet-shaped metal pigments can e.g. are based on the metal pigment compositions described in WO 2005/051675 A2 (see, for example, the description on page 11, line 10 to page 12, penultimate paragraph).
  • the pigments are based on a metal, which is preferably selected from the group consisting of aluminum, stainless steel, nichrome, gold, silver, platinum and copper.
  • the metal is particularly preferably aluminum, the mean particle diameter preferably being in a range from 2 to 50 pm, more preferably in a range from 5 to 15 pm, measured using a Coulter LS130 laser diffraction granulometer.
  • a printing ink makes it possible to provide a "silver" mirror layer.
  • the metal pigment compositions e.g. yellow
  • the invention further relates to a data carrier with a
  • the data carrier can be a document of value, such as a banknote, in particular a
  • Paper banknote a polymer banknote or a composite film banknote, for a share, a bond, a certificate, a voucher, a check, a high-quality admission ticket, but also for an identification card, such as a credit card, a bank card, a cash payment card, one
  • Authorization card an identity card or a
  • Figure 1 is a schematic representation of a banknote with a security element according to the invention
  • FIGS 2-4 an inventive security element according to a
  • FIG. 5 shows a schematic illustration of a further bank note with a security element according to the invention
  • FIGS 6-8 an inventive security element according to another embodiment
  • Figure 9 shows an example of the manufacture of the invention
  • Figure 10 shows another example of the manufacture of the
  • Figure 1 shows a schematic representation of a Banknote 1 with two transparent window areas 3 (shown in dashed lines), which are provided with a security element 4 according to the invention in the form of a patch and with a security element 5 according to the invention in the form of a strip.
  • Banknote 1 is based on one
  • Paper substrate 2 which has a continuous recess in each of the two areas 3.
  • the continuous recesses 3 are on one side of the paper substrate 2 by the inventive
  • Security elements 4 and 5 each present as a laminate film, covered.
  • the paper substrate 2 can optionally be provided with an additional transparent film.
  • the additional transparent film can cover the area of the continuous recess in the paper or can also have a recess in the area of the continuous recess in the paper.
  • the banknote shown in FIG. 1 has the denomination “20” generated by printing technology in the lower left area.
  • Figures 2 to 4 show an inventive, strip-shaped
  • FIG. 2 shows the strip-shaped security element 5 of the banknote 1 when viewed in incident light at the normal angle, i.e. at an angle of 90 ° to the plane of the paper substrate 2.
  • FIG. 3 shows the strip-shaped security element 5 of the bank note 1 when viewed in incident light at an angle of 45 ° to the plane of the paper substrate 2.
  • the characters "TEXT” (reference number 7) appear to the viewer in golden color, the background 6 appears to the viewer in green color.
  • the characters "TEXT” thus stand out clearly for the viewer when the banknote 1 is tilted in gold color against the green background.
  • FIG. 4 shows the strip-shaped security element 5 of the bank note 1 when viewed in transmitted light at an angle of 90 ° to the plane of the paper substrate 2.
  • the characters "TEXT” (reference number 7) appear to the viewer in blue, the background 6 appears to the viewer in golden color.
  • the characters "TEXT” stand out clearly for the viewer in blue color against the golden background.
  • FIG. 5 shows a schematic illustration of a further bank note 8 which is provided with a security element 9 according to the invention in the form of a security thread, strictly speaking in the form of a window thread.
  • the banknote 1 is based on a paper substrate 12 in which the thread-like security element 9 is partially embedded.
  • the thread is completely embedded within the paper. In the window areas 10, the thread is not embedded within the paper and is therefore visible to the viewer from both the front and the back.
  • the banknote shown in FIG. 5 has the denomination "20" generated by printing in the lower left area.
  • FIGS 6 to 8 show the thread-like according to the invention
  • FIG. 6 shows the thread-like security element 9 of the bank note 8 when viewed in incident light at a normal angle, ie at an angle of 90 ° to the plane of the paper substrate 12.
  • the characters “20” (reference number 14) appear to the viewer in golden color.
  • the background 13 appears to the viewer in magenta.
  • the characters "TEXT” (reference number 15) appear to the viewer in metallic, silver.
  • FIG. 7 shows the thread-like security element 9 of the banknote 8 when viewed in incident light at an angle of 45 ° to the plane of the paper substrate 12.
  • the characters "20" (reference number 14) appear to the viewer in golden color, the background 13 appears to the viewer in green color.
  • the characters "TEXT” (reference number 15) appear metallic, silver to the viewer.
  • FIG. 8 shows the thread-like security element 9 of the bank note 8 when viewed in transmitted light at an angle of 90 ° to the plane of the paper substrate 2.
  • the characters “20” (reference number 14) appear to the viewer in blue, the background 13 appears to the viewer in magenta.
  • the characters "TEXT" (reference number 15) appear to the
  • the areas with the characters “20” and the characters “TEXT”, which are shown in FIGS. 6 to 8, are arranged in the window areas 10 of the window thread 9 contained in the bank note 8 (see FIG. 5).
  • FIG. 9 shows an example for the production of the security element 5 according to the invention of the banknote 1 (see FIG. 1).
  • a polyethylene terephthalate film 16 is first provided as a carrier substrate, which is then printed with a washing ink 17 in the form of the characters “TEXT” (see reference number 7 in FIGS. 2 to 4).
  • the use of a washing ink in the production of a multilayer body is known to the person skilled in the art, see for example EP 1 972462 A2.
  • a reflective layer 18 is subsequently evaporated, in the example an Al layer.
  • a thin Cr layer can optionally be produced, which serves as an adhesion promoter.
  • a dielectric spacer layer 19 is subsequently evaporated, in the example an SiO 2 layer.
  • an absorber layer 20 is then formed
  • the layers 18, 19 and 20 form a color-shifting thin-film element with a reflector / dielectric / absorber structure.
  • the color-shifting thin-film element appears to the viewer at the normal angle, i.e. at an angle of 90 ° to the substrate plane, gold-colored and when viewed obliquely, namely at an angle of 45 ° to the substrate plane, in the color green.
  • the demetalizing step is carried out using a suitable washing solution.
  • the wash color 17 is dissolved in the wash solution, so that the wash color 17 together with the further layers 18 formed above the area of the wash color 17 19 and 20 is removed.
  • the product obtained in the demetallizing step is shown in FIG. 9 e).
  • an optional protective lacquer 21 is then applied.
  • the generation of the semitransparent thin-film element is described with reference to FIGS. 9 g) to 9 m), which gives a viewer a different color impression when viewed in incident light and when viewed in transmitted light.
  • the side of the carrier substrate 16 opposite the color-shifting thin-film element is printed with a washing ink 22 in the areas outside the characters “TEXT” (see reference number 7 in FIGS. 2 to 4).
  • a semitransparent, metallic layer 23 is then evaporated, in the example an Al layer.
  • a thin Cr layer can optionally be produced, which serves as an adhesion promoter.
  • a dielectric layer 24 is subsequently evaporated, in the example an SiO 2 layer.
  • a semitransparent, metallic layer 25 is then evaporated, in the example an Al layer.
  • the layers 23, 24 and 25 form a semitransparent
  • Thin-film element that appears golden to the viewer in reflected light and blue in transmitted light.
  • the demetalizing step is carried out using a suitable washing solution.
  • the wash color 22 is dissolved in the wash solution, so that the wash color 22 is removed together with the further layers 23, 24 and 25 formed above the area of the wash color 22.
  • the product obtained in the demetallizing step is shown in FIG. 9 k).
  • a heat-sealing lacquer layer 28 is finally applied, which is suitable for gluing the security element 5 to a document of value substrate 2, in particular a paper substrate.
  • FIG. 10 shows an example for the production of a security element according to the invention, which is similar to security element 9 of bank note 8 (see FIG. 5).
  • security element 9 of bank note 8 see FIG. 5
  • FIG. 10 shows only layer structures in FIG. 10, which have a semi-transparent area (see the characters "20" in FIGS. 6 to 8) and a shiny metallic area (see the characters "TEXT” in FIGS. 6 to 8). exhibit.
  • a multilayer body is first provided, in which a polyethylene terephthalate film 16 in the areas outside the characters “20” (see reference number 14 in FIGS. 6 to 8) and in FIGS Areas outside the characters "TEXT" (see reference number 15 in FIGS. 6 to 8) are provided with a color-shifting thin-film element with a reflective layer 18, a dielectric spacer layer 19 and an absorber layer 20.
  • the color-shifting thin-film element appears to the viewer at the normal angle, ie at at an angle of 90 ° to the substrate plane, in the color magenta and when viewed obliquely, namely at an angle of 45 ° to the substrate plane, in the color green.
  • the multi-layer body shown in FIG. 10 a) additionally has a protective lacquer 21.
  • the multi-layer body shown in FIG. 10 a) can be produced in a manner similar to that described above with reference to FIGS. 9 a) to 9 f).
  • the side of the polyethylene terephthalate film 16 opposite the color-shifting thin-film element is provided with a semitransparent, metallic layer 29, in the example an Al layer.
  • a wash color 30 is subsequently applied in the areas of the characters “20” (see reference number 14 in FIGS. 6 to 8).
  • a dielectric layer 31 is subsequently evaporated, in the example an SiO 2 layer.
  • a semitransparent, metallic layer 32 is then evaporated, in the example an Al layer.
  • the layers 29, 31 and 32 form a semitransparent
  • Thin-film element that appears golden to the viewer in reflected light and blue in transmitted light.
  • the demetalizing step is carried out using a suitable washing solution.
  • the demetalizing solution is carried out using a suitable washing solution.
  • wash color 30 dissolved in the wash solution so that the wash color 30 is removed together with the further layers 31 and 32 formed above the area of the wash color 30. That in the step of
  • the areas “A” shown in FIG. 10 e) are color-shifting areas that the viewer perceives in magenta at an angle of 90 ° and in green at an angle of 45 °.
  • Area “B” is a semi-transparent area , which can be seen by the viewer in reflected light in golden color and in transmitted light in blue color.
  • the area “C” is perceptible to the viewer in metallic silver.
  • the areas "A” form the background 13 in FIGS. 6 to 8.
  • the area “B” forms the characters “20” (see reference number 14 in FIGS. 6 to 8).
  • the area “C” forms the characters "TEXT” (See reference number 15 in Figures 6 to 8).
  • a heat seal lacquer layer 35 can be applied, if necessary, which is used for gluing the security element 9 a value document substrate 12, in particular a paper substrate, is suitable.
  • a value document substrate 12 in particular a paper substrate
  • Security element a security thread 9, which is provided on the top as well as on the back with an additional heat seal lacquer layer in order to guarantee ideal adhesion within the paper.
  • Security elements are based on the above example shown in connection with FIG. 10.
  • the polyethylene terephthalate film 16 shown in FIG. 10 a) is not provided with a semitransparent, metallic layer 29 (in particular an Al layer), but in a partial area with a wash color 30. Accordingly, a layer structure analogous to the layer structure shown in FIG. 10 b) is obtained, but in which the Al layer 29 is omitted. Then the full area is done
  • washing color 30 is removed together with the further layers formed above the area of the washing color.
  • the product obtained in the demetallizing step corresponds to the structure shown in FIG. 10 e), the Al layer 29 being one in the region “C”
  • Security elements is based on the above example shown in connection with FIG. 9.
  • the film 27 of the layer structure shown in FIG. 9 1) can be coated in the central area (ie within the area in which the layers 23-25 are arranged) with a colored layer or a metallic effect paint (eg Al - Pigments, which after printing have the appearance of a
  • the (metallic effect) color layer can in particular be such that it is not perceptible in reflected light, but only when viewed in transmitted light. I.e. in transmission the semi-transparent thin-film element (i.e. layers 23-25) appears e.g. in blue color and the printed (metal effect) color layer is recognizable to the viewer in the form of a dark contrast to the blue color.
  • a fifth example for the production of the invention
  • Security elements are based on the above example shown in connection with FIG. 10.
  • Layer structure can e.g. in area "B" before the orders of
  • Heat seal lacquer layer 35 first with a color layer or
  • Metallic effect paint e.g. Al pigments, which after printing the
  • Appearance of a homogeneous, silver mirror layer are provided, in particular in the form of characters, in the form of a pattern or in the form of a code.
  • a heat-sealing lacquer layer 35 is then applied, as shown in FIG. 10 g).
  • the color layer can be such that it is not perceptible in reflected light, but only when viewed in transmitted light. This means that in transmission the semi-transparent thin-layer element (ie layers 29-31) appears in the area "B", for example in blue color, and the printed (metallic effect) color layer is recognizable to the viewer in the form of a dark contrast to the blue color.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un élément de sécurité destiné à sécuriser des documents de valeur, comprenant un substrat porteur qui est pourvu d'un premier élément à couche mince et d'un deuxième élément à couche mince. Le premier élément à couche mince est un élément à couche mince à changement de couleur qui communique à un observateur une impression de couleur différente à différents angles d'observation, et le deuxième élément à couche mince est un élément à couche mince semi-transparent qui communique à un observateur une impression de couleur différente lorsqu'il est observé en lumière incidente et lorsqu'il est observé en lumière transmise. Le premier élément à couche mince et le deuxième élément à couche mince sont disposés sur le substrat porteur de telle sorte que le deuxième élément à couche mince est réalisé sous la forme de caractères, sous la forme d'un motif ou sous la forme d'un codage, et le premier élément à couche mince représente un fond.
PCT/EP2019/025352 2018-10-31 2019-10-21 Élément de sécurité et support de données équipé de l'élément de sécurité WO2020088791A1 (fr)

Priority Applications (2)

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EP19795455.5A EP3873749B1 (fr) 2018-10-31 2019-10-21 Élément de sécurité et support de données équipé de l'élément de sécurité
CN201980069287.4A CN112888574B (zh) 2018-10-31 2019-10-21 安全元件和配备有安全元件的数据载体

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DE102018008549.0 2018-10-31
DE102018008549.0A DE102018008549A1 (de) 2018-10-31 2018-10-31 Sicherheitselement und mit dem Sicherheitselement ausgestatteter Datenträger

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CN (1) CN112888574B (fr)
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DE102021002448A1 (de) * 2021-05-07 2022-11-10 Giesecke+Devrient Currency Technology Gmbh Mehrschichtkörper und Verfahren zum Herstellen desselben

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WO2005038136A1 (fr) 2003-10-17 2005-04-28 Giesecke & Devrient Gmbh Element de securite a effet de derive chromatique
WO2005051675A2 (fr) 2003-11-14 2005-06-09 Printetch Limited Impression
EP1972462A2 (fr) 2007-01-05 2008-09-24 Giesecke & Devrient GmbH Procédé de fabrication de feuilles de sécurité
WO2011064162A2 (fr) 2009-11-27 2011-06-03 Basf Se Compositions de revêtement destinées à des éléments de sécurité et à des hologrammes
WO2011082761A1 (fr) 2009-12-14 2011-07-14 Giesecke & Devrient Gmbh Elément à couche mince de couleur dorée présentant une structure multicouche
WO2017008897A1 (fr) * 2015-07-10 2017-01-19 Giesecke & Devrient Gmbh Élément de sécurité et support de données
WO2017028950A1 (fr) * 2015-08-17 2017-02-23 Giesecke & Devrient Gmbh Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité
WO2017194189A1 (fr) 2016-05-12 2017-11-16 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité et support de données
EP3260302A1 (fr) * 2016-06-22 2017-12-27 Giesecke+Devrient Currency Technology GmbH Élément de sécurité optique variable

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DE102014018204A1 (de) * 2014-12-09 2016-06-09 Giesecke & Devrient Gmbh Sicherheitselement, Verfahren zum Herstellen desselben und mit dem Sicherheitselement ausgestatteter Datenträger

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005038136A1 (fr) 2003-10-17 2005-04-28 Giesecke & Devrient Gmbh Element de securite a effet de derive chromatique
WO2005051675A2 (fr) 2003-11-14 2005-06-09 Printetch Limited Impression
EP1972462A2 (fr) 2007-01-05 2008-09-24 Giesecke & Devrient GmbH Procédé de fabrication de feuilles de sécurité
WO2011064162A2 (fr) 2009-11-27 2011-06-03 Basf Se Compositions de revêtement destinées à des éléments de sécurité et à des hologrammes
WO2011082761A1 (fr) 2009-12-14 2011-07-14 Giesecke & Devrient Gmbh Elément à couche mince de couleur dorée présentant une structure multicouche
WO2017008897A1 (fr) * 2015-07-10 2017-01-19 Giesecke & Devrient Gmbh Élément de sécurité et support de données
WO2017028950A1 (fr) * 2015-08-17 2017-02-23 Giesecke & Devrient Gmbh Élément de sécurité, procédé de production de ce dernier et support de données équipé de l'élément de sécurité
WO2017194189A1 (fr) 2016-05-12 2017-11-16 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité et support de données
EP3260302A1 (fr) * 2016-06-22 2017-12-27 Giesecke+Devrient Currency Technology GmbH Élément de sécurité optique variable

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CN112888574B (zh) 2022-07-26
EP3873749A1 (fr) 2021-09-08
EP3873749B1 (fr) 2024-07-03
DE102018008549A1 (de) 2020-04-30
CN112888574A (zh) 2021-06-01

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