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WO2017092865A1 - Élément de sécurité et support de données équipé d'un tel élément de sécurité - Google Patents

Élément de sécurité et support de données équipé d'un tel élément de sécurité Download PDF

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Publication number
WO2017092865A1
WO2017092865A1 PCT/EP2016/002015 EP2016002015W WO2017092865A1 WO 2017092865 A1 WO2017092865 A1 WO 2017092865A1 EP 2016002015 W EP2016002015 W EP 2016002015W WO 2017092865 A1 WO2017092865 A1 WO 2017092865A1
Authority
WO
WIPO (PCT)
Prior art keywords
security element
layer
semitransparent
element according
doe
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.)
Ceased
Application number
PCT/EP2016/002015
Other languages
German (de)
English (en)
Inventor
Giselher Dorff
Maik Rudolf Johann Scherer
Björn Teufel
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 GmbH
Original Assignee
Giesecke and Devrient 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 and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Priority to DE112016005486.6T priority Critical patent/DE112016005486A5/de
Publication of WO2017092865A1 publication Critical patent/WO2017092865A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B42D25/23—Identity cards
    • 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
    • B42D25/324—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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • 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

Definitions

  • the invention relates to a security element and to a data carrier equipped with the security element, e.g. a value document such as a banknote.
  • DOE Diffractive optical elements
  • the physical principle here is the diffraction (also called diffraction) on an optical grating.
  • different optical path lengths of the partial beams lead to phase modulations, which results in interference patterns.
  • the amplitude is modulated by constructive and destructive superimposition.
  • the intensity patterns can be manipulated in a laser beam.
  • DOEs can fulfill two tasks: they can form a laser beam (so-called "beam shaping”) or disassemble them into several partial beams (so-called “beam splitting”).
  • beam shaping laser beam
  • beam splitting partial beams
  • this technique has been used as a security feature on banknotes based on a plastic substrate.
  • the banknotes of the following countries already have such a security feature: Vietnam with 50,000 dong, 100,000 dong and 500,000 dong; Brunei with 50 Ringgit and 100 Ringgit; as well as Papua New Guinea with 100 Kina.
  • the object of the invention is to provide a security element of the type mentioned at the outset with high security against forgery and counterfeiting - - indicate an attractive visual appearance and a manufacturing process.
  • security elements for securing value documents comprising a transparent support substrate, a diffractive optical element (DOE) -containing layer, and a semitransparent functional layer arranged to cause the security element to be viewed has a first, visually recognizable color in incident light and, when viewed in transmitted light, has a second, visually recognizable color.
  • DOE diffractive optical element
  • a security element according to one of the paragraphs 1 to 4, wherein the semitransparent functional layer has a multilayer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.
  • DOE diffractive optical element
  • the semitransparent functional layer is such that the security element sub-element when viewed in reflected light has a first, visually recognizable color and when viewed in transmitted light has a second, visually recognizable color.
  • the security element is a (continuous) strip, a (continuous) thread or a patch or label.
  • a banknote such as a paper banknote, polymer banknote or foil composite banknote, or identity card.
  • the value document mentioned in the present description can be a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon, a check, a high-quality admission ticket, but also an identity card such as a credit card, bank card, cash card, entitlement card, ID card, or passport personalization page.
  • a banknote in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon, a check, a high-quality admission ticket, but also an identity card such as a credit card, bank card, cash card, entitlement card, ID card, or passport personalization page.
  • a reflection in incident light is, in the sense of this invention, an illumination of the security element from one side and a viewing of the security element from the same side.
  • a reflection in incident light is thus present, for example, when the front of the security element is illuminated and also viewed.
  • viewing in transmitted light is illumination of a security element from one side and viewing of the security element from another side, in particular the opposite side.
  • a reflection in transmitted light is thus, for example, when the back of the security element illuminated and the front of the security element is considered. The light thus shines through the security element.
  • the security element according to the invention can e.g. as a patch or label, as (endless) stripes or as an (endless) thread.
  • the data carrier substrate of the data carrier to be equipped with the security element according to the invention 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 value document or security paper provided with a window area can be produced, for example, by means of a continuous recess within the paper layer (s).
  • the paper layer can be made transparent by means of a suitable liquid, for example by means of aqueous sulfuric acid solution, within a certain range.
  • a window region can be produced, for example, by means of congruent recesses in the opaque printed layers applied to the front and back of the polymer substrate.
  • a generic security element to provide a carrier or a carrier substrate with a layer structure which comprises, inter alia:
  • a layer containing a diffractive optical element (DOE); and - a semitransparent functional layer, which is such that the security element has a first, visually recognizable color when viewed in incident light and has a second, visually recognizable color when viewed in transmitted light hereinafter also referred to simply as “semitransparent functional layer”). designated).
  • Layers comprising a diffractive optical element are e.g. from DE 10 2008 060 294 A1, WO 2005/038499 A2, WO
  • the semitransparent functional layer has different hues when viewed in reflected light on the one hand and when viewed in transmitted light on the other hand.
  • the two different shades are e.g. Complementary colors.
  • Such a semitransparent functional layer is based e.g. on a multi-layered structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.
  • Such a multi-layered structure which appears gold-colored when viewed in reflected light and shows a blue hue when viewed in transmitted light, is e.g. known from WO 2011/082761 AI.
  • Suitable multilayer structures having two semi-transparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers preferably have the following physical properties: the two semitransparent metallic layers are preferably selected from Al or Ag; the dielectric layer is in particular an SiO 2 layer;
  • the respective preferred layer thickness is in a range of 5 nm to 20 nm, particularly preferably in a range of 10 nm to 14 nm;
  • the dielectric SiCh layer preferably has a layer thickness in a range of 50 nm to 450 nm, more preferably in a range of 80 nm to 260 nm, and particularly preferably in a range of 210 nm to 260 nm, wherein the ranges of 80 nm to 100 nm and from 210 nm to 240 nm are especially preferred for providing a gold / blue color change;
  • the respective preferred layer thickness is in a range of 15 nm to 25 nm; the Si0 2 dielectric layer preferably has one
  • Layer thickness in a range of 50 nm to 450 nm, more preferably in a range of 80 nm to 260 nm, and particularly preferably in a range of 210 nm to 260 nm, wherein the ranges of 80 nm to 100 nm and 210 nm to 240 especially preferred for providing a gold / blue color change.
  • the abovementioned multi-layered layer structures not only make it possible to produce a semitransparent functional layer which appears gold-colored when viewed in reflected light and shows a blue hue when viewed in transmitted light, but further color changes can be produced depending on the choice of the layer thickness, in particular of the dielectric layer, e.g.
  • a semitransparent functional layer which has different shades when viewed in reflected light on the one hand and when viewed in transmitted light on the other hand, can also be based on a eff ektpigment- composition.
  • Printing layers based on an effect pigment composition which, when viewed in incident light, shows a different color than when viewed in transmitted light, in particular a gold / blue color change, a gold / violet color change, a green / gold / magenta color change, a Violet / green color change or a silver / opaque Farbwechsei, for example in WO 2011/064162 A2.
  • the pigments preferably have a longest dimension of edge length from end-to-end in a range of 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, Pd, Os, Ir, and Pt
  • the transition metal is preferably Ag.
  • the aspect ratio ie, the ratio of the longest dimension of Preferably, the end-to-end thickness is preferably at least 1.5, more preferably in the range of 1.5 to 300.
  • the binder to metal pigment ratio is preferably below 10: 1, more preferably below 5: 1 From the choice of pigment aspect ratio, its longest end-to-end dimension, and pigment / binder ratio adjustment, the color can be viewed in terms of the print layer in
  • 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.
  • a semitransparent functional layer which has a first, visually recognizable color (eg gold) when viewed in reflected light and has a second, visually recognizable color (eg blue) when viewed in transmitted light , combined with a layer containing a diffractive optical element (DOE).
  • DOE diffractive optical element
  • a diffractive optical element As a point light source, as with a diffractive optical element (DOE) usual, for example, a laser can be used.
  • the diffractive optical element (DOE) may in particular be based on a two-dimensional sub-waveguide or a zero-order microstructure - - based.
  • the diffractive optical element (DOE) may partially include a region formed by a two-dimensional sub-waveguide or by a zero-order microstructure.
  • zero-order microstructure is especially a
  • the diffractive optical element may further be based on a Fresnel lens or on a zonal lens.
  • the semitransparent functional layer for example with gold / blue color change in reflected light or transmitted light
  • transmitted light in addition to the blue coloration, an enlargement / reduction of the image results. You do not need a point light source and you can enlarge pictures or fonts.
  • the security element works like a magnifying glass.
  • the security element according to the invention has the following layer sequence:
  • DOE diffractive optical element
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film
  • semitransparent functional layer e.g. two semi-transparent metallic layers and a dielectric layer (e.g., Al / S1O2 / Al layer foil) disposed between the two semitransparent metallic layers.
  • the above security element may e.g. with the side formed by the layer a) or by the layer c) above the window area of a value document.
  • the security element according to the invention has the following layer sequence: - - a) transparent carrier substrate, eg PET (polyethylene terephthalate) film; b) layer comprising a diffractive optical element (DOE);
  • transparent carrier substrate eg PET (polyethylene terephthalate) film
  • DOE diffractive optical element
  • semitransparent functional layer e.g. two semitransparent metallic layers and a dielectric layer (e.g., Al / S1O2 / Al layer foil) sandwiched between the two semitransparent metallic layers.
  • dielectric layer e.g., Al / S1O2 / Al layer foil
  • the above security element may e.g. with the side formed by the layer a) or by the layer c) above the window area of a value document.
  • the security element according to the invention has the following layer sequence:
  • DOE diffractive optical element
  • semitransparent functional layer e.g. two semitransparent metallic layers and a dielectric layer (e.g., Al / S1O2 / Al layer foil) disposed between the two semitransparent metallic layers;
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film.
  • the security element according to the invention additionally has a micromirror arrangement, which, e.g. is produced by means of an embossed lacquer and a metallization.
  • the layer sequence is e.g. the following:
  • DOE diffractive optical element
  • semitransparent functional layer comprising: bl) a semi-transparent metallic layer, eg Al; b2) a dielectric layer, eg S1O2; b3) one semitransparent metallic layer, eg Al, oriented along the embossing lacquer layer c);
  • embossed lacquer in particular embossed UV lacquer
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film.
  • the above security element may e.g. with the side formed by the layer a) above the window area of a value document.
  • the layers b3) and c) together form a micromirror arrangement.
  • the security with window area provided with the security element according to the invention is based on a double-foil structure having the following layer sequence: a) transparent carrier substrate, e.g. PET (polyethylene terephthalate) film; b) layer comprising a diffractive optical element (DOE);
  • a transparent carrier substrate e.g. PET (polyethylene terephthalate) film
  • DOE diffractive optical element
  • semitransparent functional layer e.g. two semitransparent metallic layers and a dielectric layer (e.g., Al / SiO 2 / Al layer sequence) disposed between the two semitransparent metallic layers;
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film.
  • the security with window area provided with the security element according to the invention is based on a double-foil structure having the following layer sequence: a) transparent carrier substrate, e.g. PET (polyethylene terephthalate) film; b) semitransparent functional layer, e.g. two semitransparent metallic layers and a dielectric layer (e.g., Al / S1O2 / Al layer sequence) disposed between the two semitransparent metallic layers;
  • a transparent carrier substrate e.g. PET (polyethylene terephthalate) film
  • semitransparent functional layer e.g. two semitransparent metallic layers and a dielectric layer (e.g., Al / S1O2 / Al layer sequence) disposed between the two semitransparent metallic layers
  • a dielectric layer e.g., Al / S1O2 / Al layer sequence
  • transparent carrier substrate eg PET (polyethylene terephthalate) film;
  • DOE diffractive optical element
  • the security with window area provided with the security element according to the invention is based on a double-foil structure having the following layer sequence: a) semitransparent functional layer, e.g. two semitransparent metallic layers and a dielectric layer (e.g., Al / S1O2 / Al layer sequence) disposed between the two semitransparent metallic layers;
  • a semitransparent functional layer e.g. two semitransparent metallic layers
  • a dielectric layer e.g., Al / S1O2 / Al layer sequence
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film
  • value document substrate with window area e.g.
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film
  • layer comprising a diffractive optical element (DOE).
  • DOE diffractive optical element
  • the security with window region provided with the security element according to the invention is based on a double-foil structure having the following layer sequence: a) semi-transparent functional layer, e.g. two semi-transparent metallic layers and one between the two semitransparent metallic layers
  • Layered dielectric layer e.g., Al / S1O2 / Al layer foil
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film
  • value document substrate with window area e.g.
  • e layer comprising a diffractive optical element (DOE);
  • DOE diffractive optical element
  • transparent carrier substrate e.g. PET (polyethylene terephthalate) film.
  • the semitransparent functional layer mentioned in all the above variants may alternatively be based on the effect pigment composition mentioned earlier in the description.
  • - - Ag / SiC / Ag structure can be used instead of AI / S1O2 / AI structure.
  • the size or dimension of the diffractive optical element (DOE) on the one hand and the semitransparent functional layer on the other hand need not be identical.
  • the diffractive optical element (DOE) can only make up a region within the semitransparent functional layer.
  • Figure la a security element with blue / gold effect according to the prior art when viewed in transmitted light
  • Figure b shows a security element with blue / gold effect according to the prior art when viewed in incident light
  • FIG. 2 shows the security element of Figure 1 in cross-sectional view
  • FIG. 3 shows a security element according to the invention
  • FIG. 4 shows a further security element according to the invention
  • FIG. 5 shows a further security element according to the invention
  • FIG. 6 shows a further security element according to the invention. - -
  • FIG. 7 shows a further security element according to the invention.
  • Fig. 1 shows a security element in plan view of the front, wherein Fig. La shows the security element in the transmitted light and Fig. Lb in reflected light.
  • Fig. La shows the security element in the transmitted light
  • Fig. Lb in reflected light.
  • the viewer sees a blue surface 1 and 2, in which a brown surface 4 is located.
  • the observer sees a surface 3 in the form of the figure "5" in blue color
  • the surfaces 1, 2 and 3 are here designed as a blue / gold coating, so that the viewer when changing from transmitted light to incident light a color change of Faces 1, 2 and 3 from blue to gold, which is represented by different hatchings in Fig. 1a and Fig. 1b
  • FIG. 3 shows a document of value, namely a banknote, with a window area and a security element according to the invention applied to the value document substrate in the window area.
  • the security element has the following layers:
  • DOE diffractive optical element
  • transparent carrier substrate 8 e.g. PET (polyethylene terephthalate) film
  • Semitransparent functional layer namely two semitransparent metallic layers 5 and 7 and a dielectric layer 6 (for example Al / S1O2 / Al layer foil) arranged between the two semitransparent metallic layers.
  • DOE diffractive optical element
  • the observer 15 recognizes the motif formed by the diffractive optical element (DOE) 9.
  • DOE diffractive optical element
  • the security element has the following layers:
  • a) transparent carrier substrate 8 e.g. PET (polyethylene terephthalate) film
  • layer 9 comprising a diffractive optical element (DOE);
  • DOE diffractive optical element
  • semitransparent functional layer namely two semitransparent metallic layers 5 and 7 and a dielectric layer 6 arranged between the two semitransparent metallic layers (eg Al / S1O2 / Al layer foil).
  • DOE diffractive optical element
  • FIG. 5 shows a further value document, namely a banknote, with a window area and a security element according to the invention applied to the value document substrate in the window area according to a further exemplary embodiment.
  • the window area of the value document is formed by a recess in the paper layer 11.
  • the security element has the following layers:
  • DOE active optical element
  • semitransparent functional layer namely two semitransparent metallic layers 5 and 7 and a dielectric layer 6 (e.g., Al / S1O2 / Al layer sequence) disposed between the two semitransparent metallic layers;
  • transparent carrier substrate 8 e.g. PET (polyethylene terephthalate) film.
  • FIG. 6 shows another document of value, namely a banknote, with a window area and in the window area on the value document substrate - - Applied inventive security element according to another embodiment.
  • the security element is based in the present case on two security element sub-elements, which are each applied to the value document substrate.
  • the window area of the value document is formed by a recess in the paper layer 11.
  • the first security element sub-element comprises the following layers: a) transparent carrier substrate 8, e.g. PET (polyethylene terephthalate) film; b) layer 9, comprising a diffractive optical element (DOE).
  • a transparent carrier substrate 8 e.g. PET (polyethylene terephthalate) film
  • DOE diffractive optical element
  • the second security element subelement has the following layers:
  • a) transparent carrier substrate 8 for example PET (polyethylene terephthalate) film
  • semitransparent functional layer namely two semitransparent metallic layers 5 and 7 and a dielectric layer 6 arranged between the two semitransparent metallic layers (eg Al / SiO 2 / Al layer foil).
  • laser light 12 leads to the reproduction of an image 13, which can be recognized by the observer, as a result of the dif fr active optical element (DOE) 9.
  • DOE dif fr active optical element
  • the observer 15 recognizes the motif formed by the diffractive optical element (DOE) 9.
  • DOE diffractive optical element
  • FIG. 7 shows a further value document, namely a banknote, with a window area and a security element according to the invention applied to the value document substrate in the window area according to a further exemplary embodiment.
  • the pane of the value document becomes - - formed by a recess in the paper layer 11.
  • the security element has the following layers:
  • a) transparent carrier substrate 8 e.g. PET (polyethylene terephthalate) film
  • semitransparent functional layer namely two semitransparent metallic layers 5 and 7 and a dielectric layer 6 (e.g., Al / S1O2 / Al layer sequence) disposed between the two semitransparent metallic layers;
  • the semitransparent metallic layer 5 is aligned along the embossing of the UV embossing lacquer layer 16 and together with it forms a micromirror arrangement;
  • d) layer 9 comprising a diffractive optical element (DOE).
  • DOE diffractive optical element
  • the observer 15 recognizes the motif formed by the diffractive optical element (DOE) 9.
  • DOE diffractive optical element

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

L'invention concerne un élément de sécurité pour protéger des documents de valeur, cet élément comprenant un substrat support transparent, une couche contenant un élément optique diffractif (EOD) et une couche fonctionnelle semitransparente qui est telle que, lorsque l'élément de sécurité est observé en lumière réfléchie, il présente une première couleur perceptible visuellement et, lorsqu'il est observé par transparence, il présente une deuxième couleur perceptible visuellement.
PCT/EP2016/002015 2015-12-01 2016-11-29 Élément de sécurité et support de données équipé d'un tel élément de sécurité Ceased WO2017092865A1 (fr)

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WO2020083794A1 (fr) 2018-10-25 2020-04-30 Basf Se Compositions comprenant des nanoplaquettes d'argent
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WO2022238468A1 (fr) 2021-05-12 2022-11-17 Basf Se Compositions comprenant des particules de métal de transition en forme de plaquettes
WO2023072740A1 (fr) 2021-10-26 2023-05-04 Basf Se Procédé pour la production d'éléments d'interférence
WO2024231418A1 (fr) 2023-05-08 2024-11-14 Basf Se Compositions comprenant des nanoplaquettes d'argent

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