EP3842256B1 - Procédé de fabrication d'un document de sécurité et document de sécurité ainsi obtenu - Google Patents

Procédé de fabrication d'un document de sécurité et document de sécurité ainsi obtenu Download PDF

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Publication number
EP3842256B1
EP3842256B1 EP19306769.1A EP19306769A EP3842256B1 EP 3842256 B1 EP3842256 B1 EP 3842256B1 EP 19306769 A EP19306769 A EP 19306769A EP 3842256 B1 EP3842256 B1 EP 3842256B1
Authority
EP
European Patent Office
Prior art keywords
lens
layer
security document
lenses
laser
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.)
Active
Application number
EP19306769.1A
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German (de)
English (en)
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EP3842256A1 (fr
Inventor
Olga SIARHEYEVA
Christophe Duriez
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.)
Idemia France SAS
Original Assignee
Idemia France SAS
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 Idemia France SAS filed Critical Idemia France SAS
Priority to EP19306769.1A priority Critical patent/EP3842256B1/fr
Publication of EP3842256A1 publication Critical patent/EP3842256A1/fr
Application granted granted Critical
Publication of EP3842256B1 publication Critical patent/EP3842256B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/425—Marking by deformation, e.g. embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers

Definitions

  • the present invention relates to a manufacturing method of a security document.
  • An identity document shall comply with requirements of being easy to check and difficult to counterfeit.
  • one way to secure a document is to implement the security feature at the latest stage of the production process of the document which is a personalization step of said document.
  • EP 2 927 881 A1 discloses a manufacturing method of a security document, the method comprising a formation step of a card body comprising an assembly step of at least one substrate and a top layer, the top layer comprising an external surface, and a coating layer positioned between the substrate and the top layer, and a lamination step of at least the substrate, the coating layer and the top layer; a personalization step comprising a reshaping step in which the external surface of the security document is reshaped; and an engraving step in which the coating layer is engraved through the top layer.
  • EP 2 927 881 A1 does not disclose that a lens is added onto the lens pattern of a lens layer.
  • the invention provides a manufacturing method as defined in claim 1.
  • Preferred embodiments are set forth in the dependent claims.
  • the invention deals with modifying the shape of the surface of the security document, which is considered as the external surface.
  • the security document comprises a lens layer which comprises several lenses (also called microlenses). A surface of the lens layer then forms at least part of the surface of the security document.
  • At least one lens of the lens layer is reshaped during the reshaping step.
  • the reshaping step comprises a formation step of at least one lens on the surface of the security document.
  • Such lens is another lens.
  • Such a lens can be added on a flat surface of the security document, or according to the invention onto the lens pattern of a lens layer, for example between two adjacent lenses of the lens layer.
  • a laser is used for reshaping the surface of the security document in the reshaping step.
  • the laser modifies the profile of the surface, or even of the lenses the case being such that at least one lens, or even each lens, has different slopes than another.
  • the surface of the document after the personalization step have different optical properties than the same surface before the personalization step.
  • the lenses may have different radius, so the path of one incident light ray is modified, in comparison with the original surface shape.
  • the laser modifies the surface so that it creates a bulge which forms a lens.
  • adding at least another lens also modifies the lens pattern of the lens layer, i.e. the lens layer surface.
  • such lens is added between two lenses of the lens layer.
  • the reshaped surface by adding a lens and/or modifying at least one lens of the lens layer, allows to obtain a designed color shift feature, or a designed metallic shift feature, or a secondary portrait, or a combination thereof, for examples.
  • the lens layer may initially comprise semi-cylindrical lenses, or triangle lenses, pyramidal lens etc...
  • corresponding flanks of at least two lenses of the lens layer are reshaped in the reshaping step.
  • two flanks of one lens of the lens layer are reshaped in the reshaping step.
  • the lens profile is reshaped such that one lens has different slopes at each flank.
  • the laser is a CO 2 laser, which is implemented for reshaping the surface of the document, for example the surface of the lens layer if the document comprises one.
  • the CO 2 laser is configured to emit a laser beam at a wavelength comprised between 9 000 nm and 11 000 nm, preferably equal to 10 600 nm.
  • the external surface belongs to a top layer which is integrated in the card body during a lamination step, and then, this top layer is reshaped during the personalization step.
  • the method thus comprises a formation step of a card body comprising an assembly step of at least one substrate and a top layer, and a lamination step of at least the substrate and the top layer.
  • the top layer comprises the lens layer, which is so integrated in the card body during a lamination step, and then, the obtained lens pattern is reshaped during the personalization step.
  • the method comprises a formation step of a card body comprising an assembly step of at least the substrate and the lens layer, and a lamination step of the card body including at least the substrate and the lens layer.
  • the formation step of the card body comprises an assembly step of a coating layer positioned under the top layer, for example between the substrate and the top layer.
  • the top layer is preferably reshaped in such a way that a coating layer is located within the focal plane of the lenses, added or modified, under a certain observation angle.
  • the focal plane is set in a vertical distance from the coating layer.
  • the vertical distance can be determined by radius of curvature and height at the vertex of the lens, added or modified.
  • the coating layer comprises a pigmented coating.
  • the method comprises an engraving step in which the coating layer is engraved through the top layer.
  • personal information is engraved.
  • Such personal information can comprise, name, numbers, logos, etc.
  • a YAG laser is implemented for engraving the coating layer through the top layer.
  • the YAG laser is configured to emit a laser beam at a wavelength equal to 1064 nm.
  • the steps are sequenced as follows: assembly step, then lamination step, then reshaping step.
  • the shape of a lens deals with the slope and/or the radius of a flank of a lens, which may be either a height (thickness) or a width; the height and the width may be identical in case of a rounded shaped, or different, for example if the lens is flatter.
  • the slope can be defined by an angle relative to a substrate for example.
  • At least two different flanks focus the incident light at different depth levels within the document.
  • the top layer comprises a lens layer.
  • two lenses of the lens layer have parallel geometrical axis.
  • the lenses of the lens layer are linear lenticules, having same orientations, i.e. with their geometrical axis parallel to each other.
  • the lens layer comprises an array of lenticules.
  • one lens of the document has two flanks with different shapes.
  • one flank may have different curvature radii; therefore, it modulates the incident light at different focal distances.
  • a multifocal lens enables to focus incident light to several focal points along the optical axis.
  • flanks of one lens have different shapes from the corresponding flanks of another lens of the document.
  • the document comprises a card body comprising a substrate, laminated with the top layer.
  • the substrate is made of plastic material, such as polycarbonate, or of any material which can be fused, for example during a lamination step.
  • the top layer and the substrate have a thickness of at least 500 ⁇ m (micrometers), and preferably at most 680 ⁇ m.
  • the card body comprises a coating layer.
  • the coating layer is positioned under the top layer, between the substrate and the top layer.
  • the coating layer may optionally comprise a printed area.
  • the coating layer comprises at least two patterns, each of the two patterns being visible through the top layer according to one respective viewing angle.
  • the at least two patterns comprise interlaced images so that they can be seen through a lens layer.
  • At least one pattern of the coating layer comprises personal information.
  • the lenses of the top layer overlay and focus the incident light on personal information laser engraved in the coating layer.
  • the coating layer is a laser sensitive layer.
  • the laser sensitive layer is arranged such that personal information can be viewed through the lenses.
  • the coating layer comprises at least one metal pigment ink, and/or Optical Variable Material (OVM), and/or other coatings containing interference pigments.
  • OVM Optical Variable Material
  • the observed color(s) of metal ink depend on pigments type, to mention copper (Cu), silver (Ag), or gold (Au) etc.
  • An OVM coating acts on the duality of the observation of a color that shifts depending on the clarity or darkness of the background.
  • OVM inks show a very strong fluorescence under UV light.
  • the top layer is made of a transparent material, for example of a plastic material too.
  • the coating layer can be viewed through the top layer.
  • each lens focuses or expands impinging light in only one direction at its focal distance; each lens brings light to a line focus.
  • the line focus is formed at 90° to the lens power meridian that forms it.
  • the flanks of one lens have a focal length of at least 10 ⁇ m, preferably at least 100 ⁇ m, more preferably at least 250 ⁇ m.
  • the lenses of the lens layer have a pitch in the range of between 10 ⁇ m and 300 ⁇ m.
  • the pitch is defined here as centre-to-centre distance between adjacent lenses, for example for parallel cylindrical lenses.
  • a space between two adjacent lenses of the lens layer is preferably comprised between 0 ⁇ m (which means those two lenses are appended) and 300 ⁇ m.
  • the space is preferably comprised between 10 ⁇ m and 300 ⁇ m, and is preferably about 150 ⁇ m.
  • the space between this lens and an adjacent lens is preferably comprised between 0 ⁇ m and 10 ⁇ m.
  • one lens of the lens layer has a thickness in the range of between 100 ⁇ m and 300 ⁇ m.
  • An added lens has, for example, a thickness in the range of between 1 ⁇ m and 30 ⁇ m.
  • Such a security document comprises a multilayered body structure.
  • each of the layers in the card body is comprised of plastic material, such as polycarbonate.
  • Different plastics can be used given that they can be fused together, for example during a lamination step.
  • the security document has a width and a length dimensions typically in accordance with those of so called ID-1, ID-2 or ID-3 cards, as defined in the ISO/IEC 7810 specification of 2003.
  • the security document can be a passport, an ID card, a passport hinge, a datapage (for example in a passport), etc...
  • Figure 1 show a side cut of a security document 1 according to one example embodiment, which is not personalized yet.
  • the security document 1 comprises here a multilayered structure.
  • It comprises a substrate 10, a coating layer 20 and a lens layer 30 as a top layer.
  • the lens layer 30 comprises several lenses 31.
  • the lens layer 30 is bonded by an external surface 32 which defines the lenses 31.
  • Such lens layer 30 provides a viewing angle dependent image and color changing effect.
  • Such lens layer is generally made of a transparent material.
  • a transparent material here refers to a material which transmit some light either in the visible or in the non-visible spectrum.
  • the lenses 31 are linear lenticules which axis are all parallel one another, i.e. which extend along one same direction, which have same orientation.
  • all the lenses 31 are here semi-cylindrical and have same dimensions, in eight (thickness) and width, so the pitch are regular.
  • the lens 31 here have, by definition, two flanks 33, 34 which each corresponds to a quarter circle in the illustrated embodiment.
  • flanks 33, 34 of one lens 31 are here identical to both flanks 33', 34' of another lens 31.
  • flank 33 of one lens 31 corresponds to flank 33' of another lens 31. Same applies to corresponding flanks 34 and 34'.
  • the lens layer 30 is here laminated on a coating layer 20 usually by means of a lamination plate comprising an imprint of the lenses.
  • the coating layer 20 is advantageously a laser sensitive layer.
  • the coating layer comprises at least one metal pigment ink, and/or Optical Variable Material (OVM), and/or other coatings containing interference pigments.
  • OVM Optical Variable Material
  • the observed color(s) of metal ink depend on pigments type, to mention copper (Cu), silver (Ag), or gold (Au) etc.
  • An OVM coating acts on the duality of the observation of a color that shifts depending on the clarity or darkness of the background.
  • OVM inks show a very strong fluorescence under UV light.
  • the coating layer 20 is here laminated on a substrate 10.
  • the coating layer 20 is between the substrate 10 and the lens layer 30.
  • the substrate is advantageously made of polycarbonate.
  • a security document as described above is realized by lamination of the substrate 10, the coating layer 20 and the lens layer 30.
  • step E1 This is illustrated as step E1 in figure 1 .
  • the document is not personalized yet.
  • the method provides a personalization step E2, illustrated in figure 2 .
  • the personalization step E2 comprises a reshaping step in which at least one lens 31 is reshaped.
  • the lens layer 30 comprises at least two lenses 31 with corresponding flanks which are different, for example flanks 36 and 36', resulting from flanks 33 and 33', or flanks 37 and 37', resulting from flanks 34 and 34'.
  • flanks 36 and 36', or corresponding flanks 37 and 37' here have different slopes, and so the corresponding lenses also have different radius.
  • step E2 the external surface 32 is reshaped to modified surface 35.
  • both flanks 36, 37 of each lens 31 are reshaped, compared to initial flanks 33, 34.
  • At least one of the flank of the lenses may remain unchanged.
  • a laser 100 can be used.
  • the laser 100 is configured to emit a laser beam 101 at a wavelength configured to modify surface 32, for example to sublimate the material of the lens layer 30.
  • the laser 100 is a CO 2 laser.
  • the coating layer can then be engraved, for example by means of the YAG laser, through the lens layer 30, preferably once it has been modified.
  • FIGS 3 and 4 illustrate an embodiment of the method, according to the invention.
  • the document comprises a top layer comprising a lens layer 30 too, but as another embodiment not illustrated, the top layer may also be a flat layer.
  • the personalization step E2 comprises a reshaping step in which at least one lens 38 is added.
  • the original external surface 32 of figure 3 becomes the modified surface 35 in figure 4 .
  • At least one lens 31 can also be modified according to the invention, before, during, or after addition of another lens 38.
  • Figure 5 finally illustrates a top view of a part of the external surface of a security document.
  • the document may also comprise one or more additional lenses 38, added between two adjacent lenses 31.
  • space e is for example comprised between 10 ⁇ m and 300 ⁇ m, and is preferably about 150 ⁇ m or more, in particular if more than one additional lens might be formed here between.
  • the various lenses 38 which have been added can have complete different shapes, as illustrated, which further personalize the document.
  • one added lens 38 is preferably formed in contact with one of the two adjacent lenses 31, and optionally (as illustrated) at a distance from the other of the two adjacent lenses 31.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Credit Cards Or The Like (AREA)

Claims (7)

  1. Procédé de fabrication d'un document sécurisé (1), le procédé comprenant
    - une étape de formation d'un corps de carte comprenant une étape d'assemblage au moins d'un substrat (10) et d'une couche supérieure (30), la couche supérieure (30) comprenant une surface externe (32), et d'une couche de revêtement (20) positionnée entre le substrat (10) et la couche supérieure (30), et une étape de stratification (E1) au moins du substrat (10), de la couche de revêtement (20) et de la couche supérieure (30) ;
    - une étape de personnalisation (E2) comprenant une étape de remodelage dans laquelle la surface externe (32) du document sécurisé (1) est remodelée, l'étape de remodelage comprenant une étape de formation d'au moins une lentille (38) sur la surface du document sécurisé (1), la lentille (38) étant ajoutée sur le motif de lentilles d'une couche de lentilles ; et
    - une étape de gravure (E3) dans laquelle la couche de revêtement (20) est gravée à travers la couche supérieure (30).
  2. Procédé de fabrication selon la revendication 1, dans lequel le document sécurisé (1) comprend une couche de lentilles (30) qui comprend plusieurs lentilles (31), une surface (32) de la couche de lentilles formant au moins une partie de la surface du document sécurisé (1), et au moins une lentille (31) de la couche de lentilles (30) est remodelée pendant l'étape de remodelage.
  3. Procédé de fabrication selon l'une quelconque des revendications 1 et 2, dans lequel la lentille (38) est ajoutée entre deux lentilles adjacentes (31) de la couche de lentilles.
  4. Procédé de fabrication selon la revendication 2, dans lequel des flancs correspondants (33, 33', 34, 34') d'au moins deux lentilles (31) de la couche de lentilles (30) sont remodelés dans l'étape de remodelage.
  5. Procédé de fabrication selon l'une quelconque des revendications 2 et 4, dans lequel deux flancs (33, 34) d'une lentille (31) de la couche de lentilles (30) sont remodelés dans l'étape de remodelage.
  6. Procédé de fabrication selon l'une quelconque des revendications 1 à 5, dans lequel on utilise un laser (100) pour remodeler la surface (32) du document sécurisé (1) dans l'étape de remodelage.
  7. Procédé de fabrication selon la revendication 6, dans lequel le laser (100) est un laser à CO2, et le laser à CO2 est configuré pour émettre un faisceau laser (101) à une longueur d'onde comprise entre 9000 nm et 11 000 nm, de préférence égale à 10 600 nm.
EP19306769.1A 2019-12-24 2019-12-24 Procédé de fabrication d'un document de sécurité et document de sécurité ainsi obtenu Active EP3842256B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19306769.1A EP3842256B1 (fr) 2019-12-24 2019-12-24 Procédé de fabrication d'un document de sécurité et document de sécurité ainsi obtenu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19306769.1A EP3842256B1 (fr) 2019-12-24 2019-12-24 Procédé de fabrication d'un document de sécurité et document de sécurité ainsi obtenu

Publications (2)

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EP3842256A1 EP3842256A1 (fr) 2021-06-30
EP3842256B1 true EP3842256B1 (fr) 2024-01-24

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2979735B1 (fr) * 2011-09-02 2014-05-23 Arjowiggins Security Structure de securite comportant un vernis transparent, et procede associe.
DE102013223660A1 (de) * 2013-11-20 2015-05-21 Bundesdruckerei Gmbh Sicherheitsdokument mit Biegesicherheitsmerkmal
EP2927881A1 (fr) * 2014-03-31 2015-10-07 Gemalto SA Support de données
GB2562198B (en) * 2017-02-03 2021-05-05 De La Rue Int Ltd Method of forming a security document

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"OPTICAL DOCUMENT SECURITY", 1 January 2005, ARTECH HOUSE, Boston, Mass. [u.a.], ISBN: 978-1-58053-258-7, article VAN RENESSE RUDOLF L.: "Laser-engraved tilt images", pages: 86 - 87, XP055910294 *

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