EP3140127B1 - Élément multicouche et procédé pour le fabriquer - Google Patents

Élément multicouche et procédé pour le fabriquer Download PDF

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Publication number
EP3140127B1
EP3140127B1 EP15724532.5A EP15724532A EP3140127B1 EP 3140127 B1 EP3140127 B1 EP 3140127B1 EP 15724532 A EP15724532 A EP 15724532A EP 3140127 B1 EP3140127 B1 EP 3140127B1
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EP
European Patent Office
Prior art keywords
layer
partial
metallic
region
lacquer
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.)
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EP15724532.5A
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German (de)
English (en)
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EP3140127A1 (fr
Inventor
Reto KARRER WALKER
Andreas Schilling
René Staub
Christina Streb
Christian Saxer
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OVD Kinegram AG
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OVD Kinegram AG
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Application filed by OVD Kinegram AG filed Critical OVD Kinegram AG
Priority to SI201531203T priority Critical patent/SI3140127T1/sl
Priority to PL15724532T priority patent/PL3140127T3/pl
Priority to RS20200213A priority patent/RS59973B1/sr
Publication of EP3140127A1 publication Critical patent/EP3140127A1/fr
Application granted granted Critical
Publication of EP3140127B1 publication Critical patent/EP3140127B1/fr
Priority to HRP20200694TT priority patent/HRP20200694T1/hr
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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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/28—Printing on other surfaces than ordinary paper on metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0058—Digital printing on surfaces other than ordinary paper on metals and oxidised metal surfaces
    • 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
    • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
    • 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
    • B42D25/337—Guilloche patterns
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B42D25/378—Special inks
    • 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
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • 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
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • 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
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
    • B44F1/10—Changing, amusing, or secret pictures

Definitions

  • the invention relates to a multilayer body and a method for its production.
  • ODD optically variable elements
  • diffractive elements diffractive elements
  • partially metallized layers printed features
  • WO 2008/017362 A2 describes a method for producing a multilayer body and a multilayer body.
  • WO 2006/046216 A2 describes a safety device and a safety support that includes it.
  • WO 2009/080262 A1 describes a security element and a method for its production.
  • WO 2006/084686 A2 describes a multilayer body and a method for producing a multilayer body.
  • WO 2009/109343 A2 describes a method for producing a film element.
  • WO 2011/006634 A2 describes a method for producing a multilayer body and a multilayer body.
  • Register or register accuracy is to be understood as the positional arrangement of layers lying one above the other or next to one another relative to one another while observing a desired position tolerance.
  • the term "register” comes from the register marks or tax marks used, by means of which the position tolerance can be measured and checked.
  • Such a method for producing a multilayer body in the form of a security element is defined in claim 1.
  • a multilayer body obtainable in this way is used in the form of a security element, in particular for a security document, in particular a bank note, a security, an identification document, a visa document, a passport, a vignette, a certificate or a credit card.
  • the partial demetallization of the metal layer thus takes place in several steps and can therefore be carried out in different ways for the different areas of the multilayer body.
  • This increases the design options for the multilayer body.
  • the demetallization can be carried out in the register to a different layer than in the second area. This enables particularly complex and appealing designs.
  • the partial lacquer layer as a mask to structure the metal layer in the second area, it is possible to arrange the two layers exactly in register with one another. It is particularly important that the partial lacquer layer extends not only into those areas that are covered by the metal layer, but also into the areas that are not covered by the metal layer. The partial lacquer layer thus overlaps the metal layer partially, perpendicular to a surface spanned by the metal layer or the partial lacquer layer.
  • step b) it is also possible in step b) to partially demetallize the metal layer to form a first and second region of the multilayer body, and then in step c) to carry out a partial lacquer layer in the second region and, if appropriate, in the first region of the multilayer body to form a to apply second optical information in the second area and optionally a first optical information in the first area, the partial lacquer layer extending at least partially beyond the metal layer in the second area and optionally in the first area.
  • the final structuring of the metal layer is thus optionally carried out in both areas using the partial lacquer layer. In this way, layer structures made of metal and lacquer, which are arranged perfectly in register, result in a particularly appealing optical design.
  • the partial lacquer layer When the partial lacquer layer is used as a mask, it is to be understood here that when the metal layer is structured, it is either selectively retained in the areas covered by the partial lacquer layer or is selectively removed. The structuring therefore results in a defined positional relationship between the two layers, so that these are arranged in register with one another, for example, for a viewer to connect seamlessly to one another.
  • the partial demetallization of the metal layer is preferably carried out by etching. It is expedient if the partial lacquer layer is an etching resist or comprises an etching resist.
  • An etching resist is understood to mean a substance that is resistant to an etchant and that can protect a substance that is sensitive to the etchant from attack by the etchant where it covers it.
  • an etchant is applied to the resulting layer stack, which is the Removed metal layer where it is not covered by the partial paint layer.
  • the etching resist is preferably a lacquer, which in particular can comprise binders, dyes, pigments, in particular colored or achromatic pigments, effect pigments, thin film layer systems, cholesteric liquid crystals and / or metallic or non-metallic nanoparticles.
  • the partial lacquer layer not only fulfills a protective function when structuring the metal layer, but can also have a decorative effect. It is also possible for several different etching resists, for example resist lacquers with different colors, to be used in order to produce further visual effects.
  • resist lacquers can also be designed in such a way that they serve as a manipulation indicator when attempts are made to manipulate the security document. For example, attempts can be made to change or remove or make an entry, such as a validity date or a photo, or make it invisible, using organic solvents or oxidizing agents.
  • the resist lacquers can be designed, for example, to be soluble in alcohols, so that they dissolve when exposed to alcohol and the dye migrates, so that the printed image of the etching resist flows visibly and blurs.
  • resist lacquers can have other substances which, when exposed to certain chemicals, exhibit a visually recognizable color reaction, for example a color change. Such substances are known, for example, as "solvent reactive inks".
  • the etchant used to structure the metal layer depends on the composition of this layer or this layer system.
  • Sodium hydroxide, potassium hydroxide, sodium carbonate, tetramethylammonium hydroxide or sodium ethylenediaminetetraacetate are suitable, for example.
  • acidic etching media can also be used, such as sulfuric acid, hydrochloric acid, phosphoric acid or strong oxidizing agents, such as sodium persulfate, hydrogen peroxide, or a chronological sequence of different etching media or a combination of the aforementioned media.
  • etchants for example, etch resists based on PVC (polyvinylchloride), polyester resins, acrylates are suitable, with further film-forming substances such as nitrocellulose typically being admixed.
  • PVC polyvinylchloride
  • polyester resins for example, polyester resins, acrylates are suitable, with further film-forming substances such as nitrocellulose typically being admixed.
  • the etching can be supported by mechanical agitation, for example by brushing, moving the etching bath or ultrasound treatment.
  • Usual temperatures for the etching process are preferably between 15 ° C and 75 ° C.
  • the metal layer in the second region is partially demetallized before the partial lacquer layer is applied in step c).
  • the metal layer is then only partially present in the second area, so that the partial lacquer layer extends partly over the metal layer and partly in regions in which the metal layer is not present. This ensures that the above-mentioned effect can be achieved after structuring the metal layer using the partial lacquer layer.
  • the partial demetallization is preferably relatively roughly structured, while finer structures are only introduced in step d).
  • the partial demetallization of the metal layer in the second region is preferably carried out by etching.
  • the etching agents and process parameters already described in the first area on the basis of partial demetalizing can be used here.
  • an etchant in particular an alkali
  • the etchant therefore only comes into contact with the metal layer in the areas to be removed, so that no protective lacquers, resists, masks or the like are necessary.
  • a photoresist prefferably applied to the second region and to be exposed using an exposure mask before the etching.
  • a photoresist changes its chemical and / or physical properties when exposed in a certain wavelength range, so that the different properties of the exposed and unexposed areas can be used to selectively remove the photoresist in one of the areas. For example, when the photoresist is exposed, its solubility changes compared to a solvent that can be used after the exposure to develop the photoresist. In the case of positive photoresists, the exposed area is selectively removed in the development step following the exposure, and in the case of negative photoresists, the unexposed area.
  • Suitable positive photoresists are, for example, AZ 1518 or AZ 4562 from AZ Electronic Materials based on phenolic resin / diazoquinone.
  • Suitable negative photoresists are, for example, AZ nLOF 2000 or ma-N 1420 from micro resist technology GmbH, for example based on cinnamic acid derivatives. These can preferably be exposed by irradiation with light in a wavelength range from 250 nm to 440 nm. The dose required depends on the respective layer thicknesses, the wavelength of the exposure and the sensitivity of the photoresists.
  • Tetramethylammonium hydroxide for example, is suitable for developing these photoresists. Development is preferably carried out at temperatures from 15 ° C. to 65 ° C. for a preferred development time from 2 seconds to a few minutes. Here, too, the development process and the associated local removal of the photoresist can again be supported by mechanical agitation, such as brushing, wiping, flow with the development medium or ultrasound treatment.
  • the photoresist can also contain binders, dyes, pigments, in particular colored pigments, effect pigments, thin film systems, cholesteric liquid crystals and / or metallic or non-metallic nanoparticles, in order to achieve additional decorative effects.
  • the exposure mask is formed by a further partial lacquer layer applied to the substrate before the metal layer is applied.
  • This coating layer which serves as an exposure mask, can be used for visible light must be transparent, translucent or opaque, but must have components such as pigments or the like that block the exposure wavelength (e.g. in the ultraviolet spectral range) to such an extent that a masking function or a contrast difference can be achieved during exposure.
  • the further partial lacquer layer expediently comprises a protective lacquer.
  • Protective lacquer is to be understood here as a substance which absorbs in a wavelength range used for exposing the photoresist.
  • the partial layers are irradiated over the entire area with light of this wavelength range, preferably perpendicular to the layer plane.
  • Typical wavelengths used for the exposure are, for example, 250 nm to 420 nm.
  • the exposure is preferably carried out with a dose of 10 mJ / cm 2 to 500 mJ / cm 2 .
  • the exposure times result from the sensitivity of the materials used and the power of the available exposure source.
  • the further partial lacquer layer is present, less light of this wavelength reaches the photoresist, so that in a subsequent etching process the metal layer can be structured in register with the further partial lacquer layer.
  • an etching resist is partially applied to the second region before the etching and is removed again after the etching.
  • the etching then takes place as already described in the structuring of the first area.
  • a partial layer of a wash varnish is applied to the substrate before the metal layer is applied, and is removed using a solvent after the metal layer has been applied.
  • the wash varnish must therefore be soluble in the solvent.
  • wash varnishes are based, for example, on polyvinyl alcohol (PVA) or polyvinyl pyrrolidone (PVP) and can additionally contain fillers which facilitate later removal of the wash varnish.
  • PVA polyvinyl alcohol
  • PVP polyvinyl pyrrolidone
  • the wash varnish is removed in a solvent bath or by spraying with solvent, preferably at temperatures from 15 ° C. to 65 ° C.
  • the removal of the wash varnish can be supported mechanically, for example by brushing, moving the solvent bath, spraying or ultrasound treatment.
  • the metal layer In areas where the metal layer is applied to the wash varnish, the metal layer is removed together with the wash varnish. The metal layer therefore only remains in areas in which it does not overlap with the partial layer of wash lacquer. So there is a negative to the overlap areas.
  • the partial demetallization of the metal layer in the second region is also possible for the partial demetallization of the metal layer in the second region to be carried out by laser ablation.
  • this makes it possible to easily produce individualized multilayer bodies which differ in the shape of their partial metal layers. For example, personalization information can thus be introduced into the multilayer body.
  • Another possibility for partially demetallizing the metal layer in the second region is the application, in particular printing, of a partial oil layer before the application of the metal layer.
  • the metal does not adhere to the substrate when the metal layer is applied, for example by vapor deposition or sputtering, so that the desired structuring is achieved already during the production of the metal layer.
  • the partial demetallization of the metal layer in several steps as described above, it is also possible to carry out the partial demetallization of the metal layer in the first and second region in a common operation.
  • a comparatively large-area partial demetallization of the metal layer on the substrate is carried out in order to create the first and second regions as separate metallized regions.
  • the remaining metallized first and second areas are, for example, approximately 1 cm 2 to 5 cm 2 in size.
  • the partial lacquer layer can overlap completely or only partially with the metal layer of the first and / or second region.
  • the partial lacquer layer extends not only into those areas that are covered by the metal layer of the first and / or second area, but also into the areas that are not covered by the metal layer.
  • the partial lacquer layer thus overlaps the metal layer of the first and / or second region completely or only partially, perpendicular to an area spanned by the metal layer or the partial lacquer layer.
  • the first area and the second area can be structured largely independently of one another, but fewer process steps are required.
  • the substrate is or comprises a replication layer with a surface relief molded into a surface facing the metal layer.
  • the replication layer can consist of a thermoplastic, ie thermally curable or dryable replication lacquer or a radiation-curable, in particular UV-curable replication lacquer or a mixture of such lacquers.
  • the surface relief introduced into the replication layer preferably forms an optically variable element, in particular a hologram, Kinegram® or Trustseal®, a preferably linear or crossed sinusoidal diffraction grating, a linear or crossed one- or multi-stage rectangular grating, a zero-order diffraction structure, an asymmetrical sawtooth Relief structure, a blaze grating, a preferably isotropic or anisotropic, matt structure, or a light-diffractive and / or refractive and / or light-focusing micro- or nanostructure, a binary or continuous Fresnel lens, a binary or continuous Fresnel freeform surface, a microprism structure or a combination structure from it.
  • an optically variable element in particular a hologram, Kinegram® or Trustseal®, a preferably linear or crossed sinusoidal diffraction grating, a linear or crossed one- or multi-stage rectangular grating, a zero-order diffraction structure
  • Such structures or combinations thereof can be used to achieve a variety of optical effects which are also difficult to imitate and cannot be copied or can only be copied with difficulty using conventional optical copying methods, so that a particularly forgery-proof multilayer body results.
  • the surface relief comprises a partial area with a depth-to-width ratio of 0.15 to 1.5, preferably 0.2 to 0.5, which is complementary to the first optical information.
  • the depth-to-width ratio enables the transparency of a metal layer applied to the surface relief to be varied.
  • This differently transparent metal layer can therefore itself serve as an exposure mask in order to structure another layer.
  • the structuring thus takes place in the register for the differently transparent areas of the metal layer and thus for the different areas of the surface relief, so that there are seamless transitions between result in different areas of the surface relief and the further layer.
  • a photoresist is applied to the metal layer and exposed from the side of the substrate, and the metal layer is then partially demetallized by etching.
  • the photoresists and etchants correspond to the variants described above. In this way, the metal layer is structured even in register with the surface relief.
  • At least one further partial lacquer layer is preferably applied to the multilayer body in order to form at least one further piece of optical information. In this way, complex and appealing designs can be realized, which enable the production of a particularly forgery-proof multilayer body.
  • a layer thickness of the partial lacquer layer and / or the at least one further partial lacquer layer is expediently 0.2 ⁇ m to 10 ⁇ m, preferably 0.3 ⁇ m to 3 ⁇ m, more preferably 0.5 ⁇ m to 1.5 ⁇ m.
  • the at least one further partial lacquer layer comprises colorants, in particular colored or achromatic pigments and / or effect pigments, thin-film systems, cholesteric liquid crystals, dyes and / or metallic or non-metallic nanoparticles.
  • the colorants can be excited in the ultraviolet spectrum for fluorescence and / or phosphorescence, in particular in the visible spectrum. It is also expedient if the colorants in the infrared spectrum can be excited to emit in the visible spectrum by means of the anti-Stokes effect. Means can also be added that have a machine-verifiable emission spectrum that is only partially or not at all in the visible spectrum.
  • the partial lacquer layer and / or the at least one further partial lacquer layer is preferably applied by printing, in particular by gravure printing, flexographic printing, offset printing, letterpress printing, screen printing, pad printing, inkjet printing and / or laser printing.
  • partial lacquer layer and / or the at least one further partial lacquer layer is radiation-hardened, in particular by UV or electron radiation.
  • At least one individualization feature is preferably applied to the multilayer body, in particular by inkjet and / or laser printing.
  • the multilayer body can be assigned to a specific security document, which also increases the security against forgery.
  • the substrate comprises a wax layer and / or a release layer and / or a protective layer, in particular a protective lacquer layer.
  • Wax and release layers can serve for the detachable arrangement of the multilayer body on a carrier, from which the multilayer body is detached prior to its attachment, for example on a security document.
  • the layer structure can also be designed such that detachment from the carrier is prevented.
  • the multilayer body remains on the carrier, or the carrier is part of the multilayer body, which is transferred to the security document.
  • the wax layer and the release layer are omitted, since no release has to be ensured.
  • additional layers can be introduced which ensure increased interlayer adhesion between the support and the replication layer.
  • the wax layer can only be partially present, so that detachment can only take place locally, while no detachment takes place in other areas.
  • the application to a security document takes place together with the carrier.
  • Such structures are, for example used to indicate attempts at manipulation. If an attempt is made to remove the security element from the security document, the release layer and / or protective layer and / or replication layer remain on the security document in those areas with locally applied wax layer, while in those areas without wax layer the layer composite is detached from the substrate together with the carrier can. The security feature is visibly damaged by this manipulation attempt.
  • the multilayer body can be transferred to a substrate, which is processed into a security document only in a later step.
  • the multilayer body can be applied to a transparent, translucent or opaque plastic layer, in particular made of polycarbonate or polyester, polypropylene or polyethylene, such as Teslin®, which are only connected to other plastic layers to form a document body in further processing steps, for example by lamination and / or back injection.
  • Typical thicknesses of the plastic layers are between 25 ⁇ m and 150 ⁇ m, preferably between 50 ⁇ m and 100 ⁇ m.
  • the layers can be transparent or contain fillers. Furthermore, they can be designed such that they can be blackened by means of a laser beam.
  • the protective layer which can also have a multi-layer structure, preferably forms a visible side of the multi-layer body, so that it is protected against mechanical or chemical damage.
  • Acrylic or polyester with additional film-forming components such as nitrocellulose, for example, can be used as a protective lacquer Systems, chemically curing systems, for example based on isocyanate, are used.
  • a layer thickness of the replication layer and / or the protective lacquer layer is preferably 0.3 ⁇ m to 3 ⁇ m, preferably 0.5 ⁇ m to 1.5 ⁇ m.
  • a layer thickness of the wax layer and / or the release layer is preferably 0.01 ⁇ m to 0.3 ⁇ m, preferably 0.1 ⁇ m to 0.2 ⁇ m.
  • layers of silicone or an acrylic polymer / acrylic copolymer can also be used.
  • the release layer can also be part of the protective lacquer layer.
  • the substrate comprises a removable carrier layer, in particular made of PET, PEN or PP. This protects the multilayer body from being attached to its final place of use and can serve as mechanical stabilization during the manufacture of the multilayer body.
  • a layer thickness of the carrier layer is expediently 5 ⁇ m to 75 ⁇ m, preferably 10 ⁇ m to 50 ⁇ m, more preferably 12 ⁇ m to 25 ⁇ m.
  • the partial metal layer preferably consists of aluminum, copper, chromium, silver and / or gold and / or an alloy thereof.
  • the partial metal layer can also consist of different metals in some areas in order to produce special optical effects.
  • a layer thickness of the metal layer is expediently 10 nm to 200 nm, preferably 10 nm to 50 nm, further preferably 15 nm to 35 nm.
  • an in particular transparent protective lacquer layer in particular made of PVC, PET, acrylate, nitrocellulose, cellulose acetobutyrate, or mixtures thereof, is arranged in the first region on the partial metal layer.
  • the protective layer can also consist of a UV or electron beam curing lacquer.
  • Such a protective lacquer layer can protect the metal layer in the first area during the structuring of the second area, so that the structures introduced first in the first area are retained.
  • a layer thickness of the protective lacquer layer is expediently 0.2 ⁇ m to 10 ⁇ m, preferably 0.3 ⁇ m to 3 ⁇ m, further preferably 0.5 ⁇ m to 1.5 ⁇ m.
  • first and / or second and / or further optical information is in the form of at least one motif, pattern, in particular a guilloche pattern, symbol, image, logo or alphanumeric character, in particular numbers and / or letters.
  • the optical information can also complement such a motif, pattern, symbol, image, logo or alphanumeric characters, in particular numbers or letters.
  • a graphic element produced in this way which arises from the interaction of several layers, is particularly difficult to reproduce and is therefore particularly forgery-proof.
  • first and / or second and / or further optical information is in the form of a one- or two-dimensional line and / or dot screen
  • the line and / or dot screen preferably has a pitch of less than 300 ⁇ m, preferably less than 200 ⁇ m and more than 25 ⁇ m, preferably more than 50 ⁇ m.
  • Transformed line grids are also possible, for example with wavy lines, which can also have a variable line width.
  • the points of a grid of points can have any geometries and / or sizes and do not have to be circular disk-shaped.
  • dot grids made of triangular, rectangular, any polygonal, star-shaped or in the form of symbols are also possible.
  • the dot matrix can also be brewed from differently sized and / or differently shaped dots. Especially when such a raster interacts with a graphic element in the respective other layer or in the respective other layer system, further graphic effects, such as, for example, halftone images, can be generated.
  • Such grids have an effect on other graphic elements that are overlaid by the grid, but are no longer perceived as such even with the naked human eye.
  • the first and / or second and / or further optical information preferably comprises at least one machine-readable feature, in particular a barcode. This enables the multilayer body to be authenticated quickly and easily, which can also be done, for example, with a mobile device such as a cell phone, PDA or the like.
  • an adhesive layer in particular made of PVC, polyester, Acrylates, cellulose esters, natural resins, ketone resins, polyamide, polyurethane, epoxy resins, or mixtures thereof. This serves to connect the multilayer body to an object or document for the authentication of which the multilayer body is to be used. It is advantageous if a layer thickness of the adhesive layer is 0.5 ⁇ m to 25 ⁇ m, preferably 1 ⁇ m to 15 ⁇ m.
  • the adhesive layer can also be multi-layer, in particular made of different materials, the aforementioned layer thickness values relating to the total thickness of the adhesive layer (s).
  • a bond with the substrate to which the feature is to be applied can be achieved, for example, by printing a UV-curing adhesive on the substrate, pressing the multilayer body onto the adhesive, and curing the UV-curing adhesive by means of UV radiation , The PET carrier film can then be removed (cold foil or cold stamping).
  • reflection layers made of a highly refractive material can be applied at least in some areas.
  • HRI High Refractive Index
  • high-index materials are zinc sulfide or titanium dioxide, which are usually applied by vapor deposition or sputtering.
  • Such layers can be applied before the metal layers are applied or after their partial metallization or after printing processes. Are located If these layers are placed directly on optical diffraction structures, further optical effects can be achieved which further increase the security of the multilayer body.
  • This visual effect is characterized by a high level of security against counterfeiting and easy verifiability.
  • a carrier layer 11 with a transfer layer 12 is first provided.
  • the carrier layer 11 preferably consists of polyester, in particular PET, and has a layer thickness of 6 ⁇ m to 75 ⁇ m, preferably 12 ⁇ m to 25 ⁇ m.
  • the transfer layer 12 can have a wax layer, a release layer, a protective lacquer layer and a replication layer, which forms the surface of the transfer layer 12 facing away from the carrier layer 11.
  • a layer thickness of the replication layer and / or the protective lacquer layer is preferably 0.3 ⁇ m to 3 ⁇ m, preferably 0.5 ⁇ m to 1.5 ⁇ m.
  • a layer thickness of the wax layer and / or the release layer is preferably 0.01 ⁇ m to 0.3 ⁇ m, preferably 0.1 ⁇ m to 0.2 ⁇ m.
  • layers of silicone or a Acrylic polymer / acrylic copolymer can be used.
  • the release layer can also be part of the protective lacquer layer.
  • the replication layer consists, for example, of a thermoplastic or a radiation- or temperature-hardenable replication lacquer. Diffractive structures are then molded into the replication layer, for example by stamping with a metallic stamping tool.
  • the surface relief introduced into the replication layer preferably forms an optically variable element, in particular a hologram, Kinegram® or Trustseal®, a preferably linear or crossed sinusoidal diffraction grating, a linear or crossed single- or multi-stage rectangular grating, a zero-order diffraction structure, an asymmetrical relief structure, a blaze grating, preferably an isotropic or anisotropic, matt structure, or a light-diffractive and / or refractive and / or light-focusing micro- or nanostructure, a binary or continuous Fresnel lens, a binary or continuous Fresnel freeform surface, a microprism structure or a combination structure thereof ,
  • the surface relief forms first optical information in a first region 2 of the multilayer body, which is provided by structures with a depth-to-width ratio of 0.15 to 1.5, preferably 0.2 to 0 , 5, and a spatial frequency, preferably at least 1000 lines / mm to 5000 lines / mm is formed.
  • a metal layer 13 is produced on the replication layer of the transfer layer 12, which is not the case, for example, by vapor deposition shown substrate can take place.
  • the vapor deposition is preferably carried out in a vacuum by thermal evaporation, by means of electron beam evaporation or by means of sputtering.
  • the metal layer 13 can preferably consist of aluminum, copper, chromium, silver and / or gold and / or an alloy thereof.
  • the partial metal layer can also consist of different metals in some areas in order to produce special optical effects.
  • a layer thickness of the metal layer 13 is expediently 10 nm to 100 nm, preferably 15 nm to 35 nm, in particular when aluminum is used.
  • the metal layer 13 is then partially removed using known methods, for example by partially applying an etching resist after the vapor deposition and subsequent etching, including removing the etching resist; by partially applying a wash varnish before evaporation and washing (lift-off) after evaporation or by partially applying a photoresist after evaporation and then exposing and subsequently removing the exposed or unexposed components of the photoresist depending on the type (positive, negative) photoresist.
  • known methods for example by partially applying an etching resist after the vapor deposition and subsequent etching, including removing the etching resist; by partially applying a wash varnish before evaporation and washing (lift-off) after evaporation or by partially applying a photoresist after evaporation and then exposing and subsequently removing the exposed or unexposed components of the photoresist depending on the type (positive, negative) photoresist.
  • the transparency of the metal layer 13 applied to the surface relief can be varied by the depth-to-width ratio of the surface relief of the replication layer in the first region 2. This different transparency can therefore serve itself as an exposure mask in order to apply one to the metal layer 13 Structure photoresist. During the subsequent etching, the metal layer 13 therefore remains in the first region 2 in register with the first optical information 131 specified in the replication layer.
  • the substrate is not vapor-deposited over the entire surface, rather the metal layer 13 is partially generated in particular in the second region 3 of the multilayer body 1.
  • Various methods are known for this, such as, for example, shielding by means of an accompanying mask or pressure of an oil, which prevents the deposition of the metal layer in the vapor deposition process.
  • the structuring of the metal layer 13 is therefore preferably carried out separately for the first region 2 and the second region 3, with only a rough structuring preferably being carried out in the second region.
  • the structuring can, however, also take place in a common work step.
  • a transparent protective lacquer 14 is applied to the metal layer 13 in the first region 2 in the next process step. This protects the already finished structured metal layer 13 in the first region 2 in the following etching processes.
  • the layer thickness of the protective lacquer layer 14 is 0.2 ⁇ m to 10 ⁇ m, preferably 0.5 ⁇ m to 1.5 ⁇ m.
  • a partial lacquer layer 15 is printed in such a way that it extends beyond the metal layer 13 in this area, but also parts of the metal layer 13 can be uncovered.
  • the lacquer layer 15 forms second optical information 151, in the example shown Guilloche pattern from fine lines.
  • the pressure of the lacquer layer 15 can also overlap areas of area 2 (not shown here).
  • the lacquer layer 15 acts as an etching resist and preferably comprises a lacquer which in particular comprises binders, dyes, pigments, in particular colored or achromatic pigments, effect pigments, thin-film layer systems, cholesteric liquid crystals and / or metallic or non-metallic nanoparticles.
  • Suitable paints are formulated, for example, on the basis of PVC, polyester or acrylates.
  • the partial lacquer layer 15 thus not only fulfills a protective function when structuring the metal layer 13, but can itself have a decorative effect. It is also possible that several different lacquers, for example with different colors, are used in order to produce further visual effects.
  • a further partial lacquer layer 16 is then applied, which forms further optical information 161. This is in Fig. 4 shown.
  • the lacquer layer 16 overlaps both the first region 2 and the second region 3.
  • a lacquer is used for the lacquer layer 16, the dyes or pigments of which cannot be seen in the visual spectrum, but which are caused by UV radiation for fluorescence and / or luminescence are stimulable.
  • a suitable varnish is composed, for example, of acrylate with nitrocellulose as a film former and admixed UV-active pigment. Such pigments can be, for example, Lumilux® pigments from Honeywell.
  • the further optical information 161 can therefore only be seen under a UV light source and serves as an additional security feature. Furthermore, the emission of fluorescence can be different depending on the wavelength of the UV light source. For example, it can be red when excited at 365 nm and green when excited at a wavelength of 254 nm and thus serve as a further security feature.
  • the further optical information 161 can represent a machine-readable pattern such as a bar code.
  • a further partial lacquer layer 17 can now be applied.
  • a varnish is used again, the colorant of which can be seen by the human eye.
  • the further partial lacquer layer 17 forms further optical information 171, here a pattern of stars, which partially overlays the optical information 131, 151 and 161 and forms a background for this.
  • the lacquer layers 15, 16, 17 are preferably applied by gravure printing, flexographic printing, screen printing, pad printing, offset printing, letterpress printing, ink jet printing and / or laser printing.
  • the layer thickness of the lacquer layers 15, 16, 16 is 0.3 ⁇ m to 3 ⁇ m, preferably 0.5 ⁇ m to 1.5 ⁇ m.
  • UV radiation curing can take place, in particular by UV radiation at wavelengths from 200 nm to 415 nm.
  • primers can be applied to improve the layer adhesion.
  • lacquers based on PVC, polyester or acrylates are suitable for this purpose in layer thicknesses of 0.01 ⁇ m to 1 ⁇ m, preferably from 0.02 ⁇ m to 0.2 ⁇ m.
  • an adhesive layer 18 is applied to the printing layers, with which the finished multilayer body 1 can be attached, for example, to a security document.
  • PVC polyvinyl chloride
  • polyester acrylates, cellulose esters, natural resins, ketone resins, polyamide, polyurethane, epoxy resins, or mixtures thereof are suitable as adhesives.
  • the layer thickness of the adhesive layer is 1 ⁇ m to 25 ⁇ m, preferably 1 ⁇ m to 15 ⁇ m.
  • the background of the decor is from the star-shaped patterns of the lacquer layer 17 are formed.
  • the optical information 161 which is only visible under UV radiation, and is formed by the lacquer layer 16 lies above this.
  • the foreground of the decor is formed by the guilloche lines of the first optical information 131 and the second optical information.
  • the first and second optical information items can also form further features.
  • the first optical information 131 also comprises a revolving microtext with reversal of contrast on the basis of asymmetrical structures.
  • This contrast reversal can be implemented, for example, with blaze or so-called sawtooth structures.
  • the same blaze structure is used for the contour and the filling of the microtext, these being attached rotated by 180 ° relative to one another.
  • Typical parameter values for the blaze structures to be used are line numbers in the range from 500 lines / mm to 1500 lines / mm and structure depths in the range from 200 nm to 500 nm.
  • the contrast reversal can be achieved with such colored or coarser achromatic blaze structures.
  • further security features are arranged, which are formed by the metal layer 13 in cooperation with the replication layer.
  • These can be, for example, micro- or nanostructures, DACs (diffractive area code), diffractive fine line effects (e.g. Transformations, transformations, pump effects, etc.) based on colored or achromatic microstructures, binary or continuous Fresnel freeform surfaces, image flip effects, or others that are either visible to the naked eye or with simple additional aids (e.g. magnifying glass) act recognizable, or recognizable with special aids (e.g. microscope), or purely machine-readable security structures.
  • DACs diffractive area code
  • diffractive fine line effects e.g. Transformations, transformations, pump effects, etc.
  • image flip effects e.g. Transformations, transformations, pump effects, etc.
  • image flip effects e.g. Transformations, transformations, pump effects, etc.
  • diffractive fine line effects for example transformations, transformations, pump effects or the like
  • colored or achromatic microstructures binary or continuous Fresnel freeform surfaces
  • image flip effects or Other security structures, micro or nanotext information, dynamic color effects or the like, which can either be seen with the naked eye or can be recognized with simple additional aids (for example a magnifying glass) or can be recognized with special aids (for example a microscope), or can be read by machine only, or can be provided.
  • micro- or nanotext information with quasi-continuous size variation can be provided, in the range from 3 ⁇ m to 2 mm, preferably in the range from 10 ⁇ m to 500 ⁇ m, further preferably in the range from 20 ⁇ m to 150 ⁇ m.
  • the multilayer body 1 can now be applied to a security document 4, for example an identification document, as in FIG Fig. 7 shown. This can be done, for example, by hot stamping or by lamination, lamination, back injection, UV transfer (cold stamping). Laminating the multilayer body 1 into the security document 4 is also possible.
  • the carrier can be peeled off after application or can remain on the substrate.
  • the security element 4 can further layers or layers applied are protected, for example by a protective film laminated over them.
  • the security feature 4 can be transferred to a further transfer layer in a first step and transferred to the substrate to be secured together with the transfer layer in a next step.
  • a security document 4 is applied in such a way that the multilayer body 1 overlaps an identification photo 41 so that it cannot be removed without the security document 4 and / or the multilayer body 1 being destroyed.
  • the multilayer body 1 can itself be partially overprinted with additional security features 42, 43. This can be done for example in inkjet printing, offset printing, letterpress printing or steel engraving.
  • the security features 42, 43 can also contain individualized information and ensure that the multilayer body 1 cannot be removed from the security document 4.
  • the necessary personalization information for the security document 4 can also be printed in the area 44 of the security document.
  • One possible method is to print the personalization information using inkjet printing. If printing is also to take place over the security feature, water-based inks in particular require a special receptive layer or an ink acceptance layer so that the print can dry in a sufficiently short time.
  • Such layers consist for example of a swellable layer, a microporous layer or a combination of both.
  • Swellable layers typically consist of polyvinyl alcohol, polyvinyl pyrrolidone, gelatin derivatives, or cellulose esters or from mixtures thereof. Layer thicknesses are typically in the range of 3 ⁇ m to 10 ⁇ m.
  • Porous layers consist, for example, of polyvinyl alcohols with large amounts of fillers. Such layers have typical layer thicknesses from 5 ⁇ m to 25 ⁇ m, preferably from 5 ⁇ m to 15 ⁇ m.
  • Such layers are advantageously part of the multilayer body 1, so that they form the uppermost layer after being applied to the security document 4.
  • such layers can also be applied to the security document 4 after application, for example by means of gravure printing, pad printing, screen printing or flexographic printing.
  • such layers can be applied as a dry transfer layer by means of a separate transfer process, for example by means of hot stamping or UV transfer (cold stamping).
  • Another area 45 is available for the attachment of machine-readable data.
  • biometric data of the holder of the security document 4 can be stored here.
  • Machine-detectable information can be printed in area 44, for example in the form of a 1D or 2D barcode.
  • Information that clearly identifies the document such as, for example, the document number and / or parts of the personal data, is particularly advantageously encrypted using cryptographic methods and printed on the document as machine-detectable information. Using suitable algorithms, the correctness of the data can then be checked and the authenticity of the entries can be verified.
  • the document number is also in the area of the multilayer body 1, i.e. is introduced overlapping with the multilayer body 1. It is particularly advantageous to introduce it using a technique that leads to an irreversible change in the multilayer body 1, for example using a laser.
  • partial areas of the metal layers in the first and / or second area can be processed by means of laser radiation, in particular after application of the multilayer body 1 to the security document 4, and the metal can thus be removed.
  • This is particularly suitable for introducing an individual identifier, such as a number. If this processing is carried out in the second section, the color printing can be seen in the areas freed from the metal, which contributes to a further increase in security.
  • by adapting the laser parameters only the metal layer can be removed locally or at the same time the color layer, so that partial areas can be colored or not colored within a number, which can be used to further increase security. Such processing can take place in the multilayer body 1 before it is applied to a substrate or only afterwards.

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Claims (15)

  1. Procédé servant à fabriquer un corps multicouche (1) sous la forme d'un élément de sécurité, comprenant les étapes :
    a) de production d'une couche de métal (13) sur un substrat ;
    b) de démétallisation partielle de la couche de métal (13) pour former une première information optique (131) dans une première zone (2) du corps multicouche (1) ;
    c) d'application d'une couche de vernis partielle (15) dans une deuxième zone (3) du corps multicouche (1) pour former une deuxième information optique (151), dans lequel la couche de vernis partielle (15) s'étend au moins en partie au-delà de la couche de métal (13) ;
    d) de structuration de la couche de métal partielle (13) dans la deuxième zone (3) en utilisant la couche de vernis partielle (15) en tant que masque, dans lequel la couche de métal partielle (13) est soit conservée de manière sélective soit retirée de manière sélective dans les zones, qui sont recouvertes de la couche de vernis partielle (15).
  2. Procédé selon la revendication 1,
    caractérisé en ce
    que la démétallisation partielle est effectuée lors de l'étape b) par gravure.
  3. Procédé selon la revendication 2,
    caractérisé en ce
    que la couche de vernis partielle (15) est un résist de gravure ou comprend au moins un résist de gravure, dans lequel le résist de gravure est de manière préférée un vernis, qui comprend en particulier des liants, des pigments, en particulier des pigments de couleur ou non colorés et/ou des pigments à effet, des systèmes de films à couches minces, des cristaux liquides cholestériques, des matières colorantes et/ou des nanoparticules métalliques ou non métalliques.
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'avant l'application de la couche de vernis partielle (15) lors de l'étape c), la couche de métal (13) est démétallisée en partie dans la deuxième zone (3) .
  5. Procédé selon la revendication 4,
    caractérisé en ce que
    la démétallisation partielle de la couche de métal (13) est effectuée dans la deuxième zone (3) par gravure, dans lequel un moyen de gravure, en particulier une lessive, est imprimé, en particulier par flexographie, sur la couche de métal (13) de manière préférée dans la deuxième zone (3) ou dans lequel de manière préférée avant la gravure, un photorésist est appliqué sur la deuxième zone (3) et est exposé à la lumière en utilisant un masque d'exposition à la lumière et de manière préférée le masque d'exposition à la lumière est formé par une couche de vernis partielle (15) appliquée sur le substrat avant l'application de la couche de métal (13), ou
    dans lequel de manière préférée avant la gravure, un résist de gravure est appliqué en partie sur la deuxième zone (3) et est retiré à nouveau après la gravure.
  6. Procédé selon la revendication 4,
    caractérisé en ce
    que la démétallisation partielle de la couche de métal (13) est effectuée dans la deuxième zone (3) par une technique de décollement Lift-Off ou est effectuée par ablation par laser ou est effectuée par application, en particulier par impression, d'une couche d'huile partielle avant l'application de la couche de métal (13) .
  7. Procédé selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce
    que le substrat est ou comprend une couche de réplication avec un relief en surface pratiqué dans une surface pointant vers la couche de métal (13), dans lequel de manière préférée le relief en surface comprend une zone partielle avec un rapport entre la profondeur et la largeur de 0,15 à 1,5, de manière préférée de 0,2 à 0,5, lequel est complémentaire à la première information optique (131), dans lequel de manière préférée pour démétalliser en partie la couche de métal (13) dans la première zone, un photorésist est appliqué sur la couche de métal (13) et est exposé à la lumière depuis le côté du substrat puis la couche de métal (13) est démétallisée en partie par gravure.
  8. Procédé selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce
    qu'au moins une autre couche de vernis partielle (16, 17) est appliquée pour réaliser au moins une autre information optique (161, 171) sur le corps multicouche (1), dans lequel de manière préférée l'au moins une autre couche de vernis partielle (16, 17) comprend des colorants, en particulier des pigments de couleur ou non colorés et/ou des pigments à effet, des systèmes de films à couches minces, des cristaux liquides cholestériques, des matières colorantes et/ou des nanoparticules métalliques ou non métalliques et dans lequel de manière davantage préférée les colorants peuvent être excités dans le spectre ultraviolet et/ou infrarouge aux fins de la fluorescence et/ou de la phosphorescence, en particulier dans le spectre visible.
  9. Corps multicouche (1) sous la forme d'un élément de sécurité, dans lequel le corps multicouche (1) comprend un substrat, une couche de métal partielle et une couche de vernis partielle (15), et dans lequel la couche de métal partielle réalise dans une première zone (2) une première information optique (131) et la couche de vernis partielle (15) réalise dans une deuxième zone (3) une deuxième information optique (151) et la couche de vernis partielle (15) est disposée dans la deuxième zone (3) dans le registre par rapport à la couche de métal partielle,
    caractérisé en ce
    que la couche de vernis partielle (15) s'étend à la fois dans des zones qui sont recouvertes par la couche de métal (13) ainsi que dans des zones non recouvertes par la couche de métal (13).
  10. Corps multicouche (1) selon la revendication 9,
    caractérisé en ce
    que le substrat est ou comprend une couche de réplication avec un relief en surface, lequel est réalisé dans une surface tournée vers la couche de métal (13), dans lequel de manière préférée le relief en surface pratiquée dans la couche de réplication réalise un élément variable optiquement, en particulier un hologramme, un réseau de diffraction sinusoïdal de préférence linéaire ou croisé, un réseau rectangulaire mono- ou multi-étagé linéaire ou croisé, une structure de diffraction d'ordre zéro, une structure en relief asymétrique, un réseau blaze, une structure matte de préférence isotrope ou anisotrope, ou une micro- ou nanostructure à diffraction de lumière et/ou à réfraction de lumière et/ou à concentration de lumière, une lentille de Fresnel binaire ou continue, une surface à forme libre de Fresnel binaire ou continue, une structure à microprismes ou une structure combinée composée de ceux-ci, et/ou dans lequel de manière préférée le relief en surface comprend une zone partielle avec un rapport entre la profondeur et la largeur de 0,15 à 1,5, de manière préférée de 0,2 à 0,5, laquelle est complémentaire à la première information optique (131).
  11. Corps multicouche (1) selon l'une quelconque des revendications 9 ou 10,
    caractérisé en ce
    qu'une épaisseur de couche de la couche de métal (13) va de 10 nm à 200 nm, de manière préférée de 10 nm à 50 nm, de manière particulièrement préférée de 15 nm à 35 nm.
  12. Corps multicouche (1) selon l'une quelconque des revendications 9 à 11,
    caractérisé en ce
    qu'au moins une autre couche de vernis partielle (16, 17) est prévue, laquelle réalise une autre information optique (161, 171).
  13. Corps multicouche (1) selon l'une quelconque des revendications 9 à 12,
    caractérisé en ce
    que la couche de vernis partielle (15) et/ou l'au moins une autre couche de vernis partielle (16, 17) comprend des colorants, en particulier des pigments de couleur ou non colorés et/ou des pigments à effet, des systèmes de films à couches minces, des cristaux liquides cholestériques, des matières colorantes et/ou des nanoparticules métalliques ou non métalliques, dans lequel de manière préférée les colorants peuvent être excités dans le spectre ultraviolet et/ou infrarouge aux fins de la fluorescence et/ou de la phosphorescence, en particulier dans le spectre visible.
  14. Corps multicouche (1) selon l'une quelconque des revendications 9 à 13,
    caractérisé en ce
    que le premier et/ou le deuxième et/ou une autre information optique (131, 151, 161, 171) sont réalisées sous la forme d'au moins un motif, d'un modèle, en particulier d'un guillochis, d'un symbole, d'une image, d'un logo ou de caractères alphanumériques, en particulier de chiffres et/ou de lettres, et/ou sous la forme d'une trame à lignes et/ou à points mono- ou bidimensionnelle, dans lequel la trame à lignes et/ou à points présente de manière préférée une largeur de trame inférieure à 300 µm, de manière préférée inférieure à 200 µm et supérieure à 25 µm, de manière préférée supérieure à 50 µm et/ou comprend au moins une caractéristique pouvant être lue par une machine, en particulier un code à barres.
  15. Document de sécurité (4), en particulier billet de banque, papier de valeur, document d'identité, visa, passeport ou carte de crédit avec un corps multicouche (1) selon l'une quelconque des revendications 9 à 14.
EP15724532.5A 2014-05-07 2015-05-07 Élément multicouche et procédé pour le fabriquer Active EP3140127B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SI201531203T SI3140127T1 (sl) 2014-05-07 2015-05-07 Večslojno telo in postopek njegove izdelave
PL15724532T PL3140127T3 (pl) 2014-05-07 2015-05-07 Element wielowarstwowy i sposób jego wytwarzania
RS20200213A RS59973B1 (sr) 2014-05-07 2015-05-07 Višeslojno telo i metoda za njegovu proizvodnju
HRP20200694TT HRP20200694T1 (hr) 2014-05-07 2020-04-29 Višeslojno tijelo i postupak za njegovu proizvodnju

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Application Number Priority Date Filing Date Title
DE102014106340.6A DE102014106340B4 (de) 2014-05-07 2014-05-07 Mehrschichtkörper und Verfahren zu dessen Herstellung sowie Sicherheitsdokument
PCT/EP2015/060050 WO2015169895A1 (fr) 2014-05-07 2015-05-07 Élément multicouche et procédé pour le fabriquer

Publications (2)

Publication Number Publication Date
EP3140127A1 EP3140127A1 (fr) 2017-03-15
EP3140127B1 true EP3140127B1 (fr) 2020-02-12

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EP15724532.5A Active EP3140127B1 (fr) 2014-05-07 2015-05-07 Élément multicouche et procédé pour le fabriquer

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EP (1) EP3140127B1 (fr)
JP (1) JP6649275B2 (fr)
CN (1) CN106457873B (fr)
AR (1) AR100330A1 (fr)
CA (1) CA2946085C (fr)
DE (1) DE102014106340B4 (fr)
ES (1) ES2774974T3 (fr)
HR (1) HRP20200694T1 (fr)
HU (1) HUE049087T2 (fr)
PL (1) PL3140127T3 (fr)
PT (1) PT3140127T (fr)
RS (1) RS59973B1 (fr)
SI (1) SI3140127T1 (fr)
WO (1) WO2015169895A1 (fr)

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FR3103736B1 (fr) 2019-11-29 2021-12-10 Idemia France Image personnalisée formée à partir d’un hologramme métallique
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DE102021002448A1 (de) * 2021-05-07 2022-11-10 Giesecke+Devrient Currency Technology Gmbh Mehrschichtkörper und Verfahren zum Herstellen desselben
KR102574400B1 (ko) * 2021-06-21 2023-09-06 주식회사 씨에스와이 치과용 임플란트 픽스쳐의 식각 방법 및 장치
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Also Published As

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HRP20200694T1 (hr) 2020-07-24
DE102014106340A1 (de) 2015-11-12
EP3140127A1 (fr) 2017-03-15
JP2017517415A (ja) 2017-06-29
US9975370B2 (en) 2018-05-22
US20170066279A1 (en) 2017-03-09
PL3140127T3 (pl) 2020-08-24
CA2946085A1 (fr) 2015-11-12
AR100330A1 (es) 2016-09-28
RS59973B1 (sr) 2020-03-31
CA2946085C (fr) 2022-08-30
DE102014106340B4 (de) 2021-05-12
CN106457873A (zh) 2017-02-22
ES2774974T3 (es) 2020-07-23
WO2015169895A1 (fr) 2015-11-12
SI3140127T1 (sl) 2020-07-31
CN106457873B (zh) 2018-11-09
HUE049087T2 (hu) 2020-09-28
JP6649275B2 (ja) 2020-02-19
PT3140127T (pt) 2020-05-11

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