EP4285421A1 - Procédé d'exposition de masque, métallisation conductrice transparente et pigment - Google Patents

Procédé d'exposition de masque, métallisation conductrice transparente et pigment

Info

Publication number
EP4285421A1
EP4285421A1 EP22700458.7A EP22700458A EP4285421A1 EP 4285421 A1 EP4285421 A1 EP 4285421A1 EP 22700458 A EP22700458 A EP 22700458A EP 4285421 A1 EP4285421 A1 EP 4285421A1
Authority
EP
European Patent Office
Prior art keywords
radiation
mask
exposure method
defined areas
layer
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.)
Pending
Application number
EP22700458.7A
Other languages
German (de)
English (en)
Inventor
Winfried HOFFMÜLLER
Michael Sobol
Andreas Rauch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP4285421A1 publication Critical patent/EP4285421A1/fr
Pending 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
    • B42D25/30—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
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/621—Providing a shape to conductive layers, e.g. patterning or selective deposition

Definitions

  • the invention relates to a mask exposure method, a transparent, conductive metallization and a pigment.
  • Electronic devices in particular semiconductors, solar cells or electrodes, can be obtained, for example, by means of the lift-off process known in the field of semiconductor production.
  • a soluble coating is usually structured in the lift-off process by exposing the soluble coating in certain areas and then structuring it in a development step.
  • Methods for fine structuring of vapor-deposited material are known in the literature, see e.g. the publication KDM Rao, C Hunger, R Gupta, GU Kulkarni, M Thelakkat: “A cracked polymer templated metal network as a transparent conducting electrode for ITO-free organic solar cells", Phys. Chem. Chem. Phys., 2014, Vol. 16, pages 15107-15110 and the paper S. Kiruthika, R.
  • a coating is first applied to a film, which forms numerous cracks as it dries. These cracks form a dense, coherent network. During the subsequent evaporation of a material, the material is deposited both on (ie above) the coating and in the cracks. When the coating is removed, for example by washing with suitable solvents, the material vapor-deposited above the coating is also removed. All that remains is the vaporized material present in the crack lines.
  • Alternatives to the production of transparent electrodes are mentioned in the article "Towards low-cost transparent conducting electrodes" by Kulkarni et al. in Current opinion in Chemical Engineering, May 2015, 8:60-68.
  • WO 2016/192858 A1 describes a further developed method for producing an electronic device, which is based on the idea of using the technologies known in the field of security element production for documents of value for fine structuring of metallizations for the provision of electronic devices.
  • the technologies include the use of a (photo)resist, the use of an etching medium and the use of wash ink.
  • a crack-forming coating is applied to a carrier substrate, the crack-forming coating is dried, the coating forming numerous cracks in the form of a dense, coherent network during drying, and the application metallization onto the support substrate such that metallic material is deposited within the cracks of the cracked coating on the support substrate.
  • a multilayer structure such as a Cr/SiO 2 /Al/SiO 2 /Cr multilayer structure or an Al/SiO 2 /Al/SiO 2 /Al multilayer structure.
  • the central Al layer acts as a reflector
  • the terminal metallic layers each have the function of an absorber layer, with a dielectric spacer layer being present between the reflector and the absorber.
  • Such effect pigments are generally produced in such a way that the desired multilayer structure is first produced over a large area, for example by means of vapor deposition on a film.
  • the multi-layer structure is then separated from the film. The detachment of the multi-layer structure can be made easier if the film is initially provided with a suitable release layer.
  • EP 0227423 B1 describes the production of an optically variable coating with the steps of providing a flexible web on which a release layer is applied, the subsequent application of an optically variable, multilayer interference coating, the detachment of the interference coating from the flexible web using a suitable solvent and breaking up the interference coating into individual pigments.
  • the multilayer structure detaches from the film in an uncontrolled manner, which leads to pigments with a broad size distribution. Furthermore, the grinding of the Multi-layer structure to pigments to fresh, irregular
  • the present invention is based on the object of improving at least one of the two above-mentioned production methods known in the prior art for electronic devices or for (effect pigments.
  • a mask exposure method comprising the following steps:
  • the binder is a polymer selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, particularly low molecular weight and moderate degree of hydrolysis, polyvinyl pyrrolidone, polyethylene glycol and casein.
  • the present invention is based on the idea of using a washing ink for the fine structuring of metallizations, which is known in the field of security element production for value documents, in particular for providing a transparent, conductive metallization in the form of a regular, coherent network and for providing platelet-shaped Pigments, especially effect pigments, to use.
  • the transparent, conductive metallization in the form of a regular, continuous network obtainable by the method according to the invention is particularly useful as an electronic device.
  • Security elements with characters that are visually recognizable in transmitted light and optionally also in reflected light are known.
  • the characters may be of any form, such as numbers, letters, patterns, geometric or figurative representations, etc., and will generally be independent of their Form referred to as "negative writing".
  • the security elements are produced, for example, by providing a transparent substrate with a coating, generally a metallic coating (or metallization), which is then removed again at certain points. If the security element is held against the light, the areas with a metallic or other coating appear dark. The areas where the coating has been removed appear light or at least significantly lighter than the coated areas, depending on the transparency of the substrate. The more transparent, ie the more translucent, a substrate is , the more pronounced is the contrast between coated and uncoated areas. In the case of very transparent substrates, the negative writing is not only clearly recognizable in transmitted light, but also in reflected light.
  • Finely structured metallization can be achieved, for example, by a so-called washing process.
  • WO 99/13157 A1 describes a washing process in which a carrier film is printed with a printing ink with a high pigment content in the form of characters, coated with a thin covering layer (e.g. made of aluminum) and then the printing ink together with the covering layer located above it are washed out with a liquid is removed to produce non-coating areas in the shape of the characters.
  • WO 92/11142 A1 (corresponds to EP 0516790 A1) and its German priority application DE 4041 025 A1 discloses printing inks which can be activated by the action of heat, for example wax-containing emulsions. When heated, these emulsions soften and thereby reduce the adhesion to the carrier film, so that these poorly adhering areas can be brushed off, supported by mechanical treatment such as ultrasound or rubbing, both the softened ink and the overlying layers can be removed.
  • Inks with foaming additives as are customary in the production of foams, are also disclosed as activatable printing inks. These blowing agents split off gas under the effect of heat and create foam structures. This increases the volume of the ink, reducing adhesion to the carrier film and causing the layers overlying the ink to bulge outwards, making them a good target for mechanical removal.
  • WO 97/23357 A1 refers to EP 0516790 A1 and also discloses activatable printing inks which are activated, i.e. washed out, by treatment with a suitable solvent.
  • the mask exposure method according to the present invention includes:
  • the carrier substrate obtained is such that it has cured washing paint with metal applied thereto only in defined areas.
  • the solubility of the binder contained in the washing color, in particular a polymer in the washing medium.
  • the metal deposited on the wash color areas is removed in the washing process together with the binder and other particles that may be contained in the wash color. What remains is the carrier substrate, on which the vapor-deposited metallic mesh remains largely undamaged in the areas not previously coated with washing paint.
  • the geometry of the metallization produced according to the manufacturing method according to the invention in the form of a regular, coherent network can advantageously be determined by a suitable choice of the parameters of the geometric structure of the radiation-opaque material of the irradiation mask and the spacing of the structures made of opaque material.
  • the metallic network obtainable by the process according to the invention does not have a statistical or random network structure, but rather a defined metallic network structure with a defined metal line width and defined metal line structure. In this way, metallic network structures with freely selectable transparency and freely selectable electrical conductivity can be produced.
  • UV radiation is advantageously used.
  • a screen can be used as the radiation mask, which is opaque in defined areas and impermeable to (UV) radiation
  • the radiation mask has structural elements that can be selected from a metal or a plastic, for example.
  • the carrier substrate is in the form of a roll-shaped endless material, it is expedient to provide the irradiation mask in the form of a rotating, cylindrical body.
  • the cylinder can be based, for example, on a material that is transparent to (UV) radiation, which is selected in particular from glass or quartz.
  • the opaque structural elements impermeable to (UV) radiation can be embedded in the transparent material, for example, or applied to the transparent material.
  • the cylinder can also be based on a mesh-like material that is provided with opaque structural elements that are impermeable to (UV) radiation.
  • the step of applying radiation to the radiation-crosslinkable washing ink layer in defined areas is carried out using a cylindrical radiation mask, it is expedient to carry out the method in such a way that the web speed of the carrier substrate, which is in the form of an (endless) substrate web, corresponds to the rotational speed of the rotating cylindrical radiation mask.
  • binder contained in the wash color polymers which have good solubility both in water and in organic solvents, typically alcohols and/or esters, have proven very advantageous for the process according to the invention.
  • binders are hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, in particular with a low molecular weight and with a medium degree of hydrolysis, polyvinyl pyrrolidone, polyethylene glycol and casein.
  • the metallic line thicknesses that can be achieved at the end of the production process are preferably in the range from 1 ⁇ m to 50 ⁇ m, with the lines generally being so fine that they can only be recognized as lines when using a magnifying glass.
  • the human eye does not resolve the individual lines on the surface, but you can see a difference in reflected light (or reflection) as well as in transmitted light (or transmission) compared to the untreated or bare carrier substrate.
  • the reflectivity or the light transmittance can be adjusted in a suitable manner.
  • the metallized network structure according to the invention is extremely advantageous in terms of significantly higher chemical resistance.
  • the metal is present in the "normal" layer thickness, while a conventional semi-transparent metallization is very thin and therefore susceptible to corrosion, especially in the case of Al and Cu.
  • the metallization according to the invention in the form of a regular, densely-meshed, coherent network exhibits an electrical conductivity and an optical transmission which is comparable to a full-area ITO layer.
  • the fine metallic lines can be used in combination with conventional embossing lacquers, conventional primer compositions and conventional heat-sealing lacquers and act as a reflector.
  • the carrier substrate that can be used is in particular a glass substrate, a film such as a polyethylene terephthalate (PET) film or a multilayer structure.
  • the carrier substrate which is provided with a metallic mesh structure
  • the carrier substrate can be provided with a continuous metallization in other areas, which serve, for example, for electrical contacting.
  • An overcoating with a metal that has a different color than the metal of the metallic network structure could also take place. In this case, the viewer would see a mixed color.
  • additional primer layers and/or heat-sealing lacquer layers can be used.
  • Other optical effects, e.g. fluorescence are also easily possible by applying additional effect layers, since the reflector used, i.e. the metallic network structure, is only present over a partial area.
  • the method of removing the wash color is advantageously done by dissolving it with a suitable solvent.
  • a suitable solvent for example, water, aqueous solutions, mixtures of solvents and water, if necessary. with surfactants, if necessary with defoamers and other additives.
  • the detachment or dissolution can also be supported by spray nozzles or also mechanically by brushes, rollers or by felts.
  • the solvent is expediently selected in coordination with the coating.
  • the following solvents can be used: methyl acetate, ethyl acetate, propyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, methylene chloride, chloroform, toluene, xylene, methanol, ethanol, 2-propanol.
  • Acetals or mixtures of the above solvents can be used.
  • the metallization of the electronic device according to the invention can be based on a single metal.
  • a suitable metal is, for example, aluminium, silver, copper, nickel, iron, chromium, cobalt, gold, titanium, tin, zinc or an alloy of one or more of the above-mentioned elements (e.g. an iron-silicon alloy).
  • the metallization can be based on a multi-layer metallization, which can be obtained, for example, by successive vapor deposition.
  • An advantageous multilayer metallization is, for example, a Cr layer followed by an Al layer. The adhesion of the Al layer to the layer structure is improved by the Cr layer.
  • the electrical conductivity of the metallization according to the invention in the form of a regular, close-meshed, cohesive network can be improved by additional coating with an electrically conductive polymer.
  • a suitable electrically conductive polymer is, for example, an electrically conductive polymer based on thiophene, such as poly-3,4-ethylenedioxythiophene (PEDOT or PEDT®).
  • PEDOT or PEDT® poly-3,4-ethylenedioxythiophene
  • inorganic, transparent and conductive layers e.g. metal oxides such as titanium dioxide, indium tin oxide or fluorine tin oxide can be applied. These additional layers can also serve to modify the electrical properties of the metallization according to the invention, such as the work function, in a controlled manner.
  • transparent, conductive metallization in the form of a regular, dense, cohesive network can subsequently by means Laser radiation can be removed in certain areas (so-called laser demetallization).
  • laser demetallization In this way, structuring of the transparent, conductive metallization is possible, ie voids or demetallized areas can be provided.
  • the step of isolating the removed metal takes place in order in this way to obtain platelet-shaped (effect) pigments receive.
  • the platelet-shaped (effect) pigments obtained by the process have a length, for example, in a range from 2 ⁇ m to 150 ⁇ m.
  • the reflective coating of the platelet-shaped effect pigments obtained according to the invention can be based on a single metallization.
  • Elements such as aluminum, stainless steel, nichrome, gold, silver, platinum and copper are suitable as the metal.
  • Platelet-shaped metal pigments which are particularly suitable for producing a reflective layer obtainable by printing, are known, for example, from WO 2013/186167 A2, WO 2010/069823 A1, WO 2005/051675 A2 and WO 2011/064162 A2.
  • the reflective coating of the platelet-shaped effect pigments obtained according to the invention can furthermore have a multilayer structure, for example an interference layer structure, which assumes a different hue depending on the viewing angle.
  • a multilayer structure for example an interference layer structure, which assumes a different hue depending on the viewing angle.
  • Such an interference layer structure is typically based on a reflection layer, a partially transparent layer or absorber layer and a dielectric spacer layer lying in between.
  • the dielectric spacer layer based, for example, on mica, on SiO 2 or on Al 2 O 3 .
  • a preferred example is a multilayer arrangement with the layer sequence semitransparent absorber layer/dielectric spacer layer/reflection layer, for example a Cr/SiO 2 /Al multilayer arrangement.
  • Pigments with a thin-film interference layer structure can also have a five-layer structure, such as the layer sequence semitransparent absorber layer/dielectric spacer layer/reflection layer/dielectric spacer layer/semitransparent absorber layer, e.g. a Cr/SiO 2 /Al/SiO 2 /Cr multilayer arrangement or an Al/SiO 2 / Al / SiO 2 / Al multi-layer arrangement, in the case of the Al / SiO 2 / Al / SiO 2 / Al multi-layer arrangement, the central Al layer has a higher layer thickness than each of the two terminal Al layers.
  • the layer sequence semitransparent absorber layer/dielectric spacer layer/reflection layer/dielectric spacer layer/semitransparent absorber layer e.g. a Cr/SiO 2 /Al/SiO 2 /Cr multilayer arrangement or an Al/SiO 2 / Al / SiO 2 / Al multi-layer arrangement,
  • an additional magnetic layer can be produced within the multilayer arrangement in order in this way to provide magnetically orientable pigments.
  • FIG. 1 to 5 show the production of a transparent conductive metallization serving as an electronic device according to the invention
  • FIG. 6 shows the transparent, conductive one according to the invention
  • FIG. 9 shows an example for carrying out the mask exposure according to the invention using a cylindrical radiation mask.
  • FIGS. 1 to 5 illustrate the production of a transparent, conductive metallization serving as an electronic device according to an embodiment of the invention.
  • a carrier substrate 1 is first provided, in the example a polyethylene terephthalate (PET) film.
  • a wash ink layer 2 that can be crosslinked by UV radiation is applied to the carrier substrate 1 over the entire surface area and is based in the example on the binder polyvinylpyrrolidone, which is 9-fold ethoxylated
  • TMP(EO)9TA Trimethylolpropane triacrylate
  • the radiation-crosslinkable washing color layer 2 is exposed in defined areas to radiation by means of a radiation mask 3, so that the washing color is cured in the defined areas.
  • Figure 3 illustrates the UV-cured areas 4 of the UV-curable washing ink layer 2.
  • a full-surface metallization 5 is then vapor-deposited, in the example an Ag layer.
  • FIG. 6 shows the photo of a transparent, conductive metallization according to the invention in the form of a regular, cohesive network in a plan view, magnified approximately 25 times. Circular areas within the regular, metallic, coherent network 5, which are present in the form of regular islands, are clearly visible. The diameter of a circular area is about 125 ⁇ m.
  • FIGS. 7 and 8 illustrate the production of an (effect) pigment according to the invention in accordance with one exemplary embodiment.
  • a full-area washing ink layer 7 that can be crosslinked by UV radiation is applied by printing, which in the example is based on the binder polyvinylpyrrolidone to which 9-fold ethoxylated trimethylolpropane triacrylate (TMP(EO)9TA) is added as a multifunctional reactive diluent and a photoinitiator.
  • TMP(EO)9TA 9-fold ethoxylated trimethylolpropane triacrylate
  • the wash-color layer 7 is present in defined areas 8 in a cured form.
  • a color-shifting thin-film element 9 with a reflector/dielectric/absorber structure is then vapor-deposited, in the example an Al/SiOa/Cr multi-layer arrangement.
  • the wash ink 7 that has not been exposed to UV radiation is then removed outside of the defined areas 8 together with the thin-film element 9 on it by washing out with a suitable solvent, so that the carrier substrate 6 obtained is such that it is only in defined areas Areas 8 of cured wash paint with a thin-layer element 9 applied thereto (see product "A” in FIG. 8).
  • the platelet-shaped effect pigments 9 are then isolated (see product "B” in FIG. 8).
  • FIG. 9 illustrates an example of carrying out the mask exposure according to the invention using a cylindrical irradiation mask 11.
  • the irradiation mask 11 is based on a material that is transparent to UV radiation, quartz in the example.
  • the irradiation mask 11 has opaque circular structure elements 13 impermeable to UV radiation, which in the example are based on a metal.
  • In the center of the cylindrical radiation mask 11 is a elongate, rod-shaped UV lamp 12.
  • the length of the UV lamp 12 is such that the carrier substrate 10 in the form of a continuous web can be completely exposed to UV light in the direction perpendicular to the direction of the continuous web.
  • the step of applying UV radiation to the radiation-crosslinkable washing ink layer in defined areas using the cylindrical irradiation mask 11 is carried out in such a way that the web speed of the carrier substrate 10, which is in the form of an endless web, matches the rotational speed of the rotating cylindrical irradiation mask 11.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé d'exposition de masque comprenant les étapes suivantes : - la fourniture d'un substrat de support ; - l'application par impression d'une couche de colorant lavable réticulable par rayonnement sur toute la surface du substrat de support ; - l'exposition de la couche de colorant lavable réticulable par rayonnement dans des régions définies à un rayonnement au moyen d'un masque de rayonnement, de sorte que le colorant lavable est durci dans les régions définies ; - l'application d'une métallisation sur toute la surface ; - l'élimination du colorant lavable non exposé au rayonnement à l'extérieur des régions définies, avec le métal présent sur celui-ci, à l'aide d'un solvant, de telle sorte que le substrat de support obtenu présente un colorant lavable durci avec un métal appliqué sur celui-ci uniquement dans les régions définies.
EP22700458.7A 2021-02-01 2022-01-10 Procédé d'exposition de masque, métallisation conductrice transparente et pigment Pending EP4285421A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021000478.7A DE102021000478A1 (de) 2021-02-01 2021-02-01 Maskenbelichtungsverfahren, transparente, leitfähige Metallisierung und Pigment
PCT/EP2022/025006 WO2022161737A1 (fr) 2021-02-01 2022-01-10 Procédé d'exposition de masque, métallisation conductrice transparente et pigment

Publications (1)

Publication Number Publication Date
EP4285421A1 true EP4285421A1 (fr) 2023-12-06

Family

ID=80113500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22700458.7A Pending EP4285421A1 (fr) 2021-02-01 2022-01-10 Procédé d'exposition de masque, métallisation conductrice transparente et pigment

Country Status (4)

Country Link
US (1) US20240042788A1 (fr)
EP (1) EP4285421A1 (fr)
DE (1) DE102021000478A1 (fr)
WO (1) WO2022161737A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ218573A (en) 1985-12-23 1989-11-28 Optical Coating Laboratory Inc Optically variable inks containing flakes
DE4041025C2 (de) 1990-12-20 2003-04-17 Gao Ges Automation Org Magnetischer, metallischer Sicherheitsfaden mit Negativschrift
DE19548528A1 (de) 1995-12-22 1997-06-26 Giesecke & Devrient Gmbh Sicherheitsdokument mit einem Sicherheitselement und Verfahren zu dessen Herstellung
DE19739193B4 (de) 1997-09-08 2006-08-03 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Sicherheitsfolien für Wertpapiere
GB0326576D0 (en) 2003-11-14 2003-12-17 Printetch Ltd Printing composition
KR20060106873A (ko) * 2005-04-04 2006-10-12 주식회사 동진쎄미켐 네가티브형 포토레지스트 조성물
WO2010069823A1 (fr) 2008-12-19 2010-06-24 Basf Se Flocons d'aluminium minces
JP6164845B2 (ja) 2009-11-27 2017-07-19 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ セキュリティ要素及びホログラムのための被覆組成物
US9720330B2 (en) * 2012-04-17 2017-08-01 The Regents Of The University Of Michigan Methods for making micro- and nano-scale conductive grids for transparent electrodes and polarizers by roll to roll optical lithography
AU2013276625B2 (en) 2012-06-14 2017-09-14 Basf Se Method for manufacturing security elements and holograms
WO2015049169A1 (fr) * 2013-10-01 2015-04-09 Bayer South East Asia Pte. Ltd. Revêtement superficiel dur à motifs formés par ultraviolets destiné à un film conducteur transparent
US9244356B1 (en) * 2014-04-03 2016-01-26 Rolith, Inc. Transparent metal mesh and method of manufacture
DE102015007238B4 (de) 2015-06-05 2017-06-22 Giesecke & Devrient Gmbh Verfahren zum Herstellen einer optoelektronischen Vorrichtung

Also Published As

Publication number Publication date
WO2022161737A1 (fr) 2022-08-04
DE102021000478A1 (de) 2022-08-04
US20240042788A1 (en) 2024-02-08

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