WO2012113546A2

WO2012113546A2 - Individualized see-through register

Info

Publication number: WO2012113546A2
Application number: PCT/EP2012/000764
Authority: WO
Inventors: Peter Schiffmann; Evelyn Akoudou; Franz Daniel; Marc Mittelstaedt; Georg Depta; Harald Reiner
Original assignee: Giesecke & Devrient Gmbh
Priority date: 2011-02-24
Filing date: 2012-02-22
Publication date: 2012-08-30
Also published as: EP2678170A2; DE102011012225A1; WO2012113546A3

Abstract

The invention relates to a security element (2) for a data carrier (1) comprising a translucent carrier substrate (3) having a front-side layer (4) and a rear-side layer (5) applied in fragmented fashion with application regions and cutouts, wherein at least one application region of the front-side layer or one application region of the rear-side layer is arranged at each location, furthermore comprising a motif (6) produced by irradiation, said motif having increased transmission and extending over a cutout and an application region in the front-side layer and/or the rear-side layer.

Description

I n d i v i d i a l i s i r e s t i n g e n t i o n s i n c o n t i o n s

The present document relates to a security element for a data carrier with an individualized transparent register, a production method for such a security element and a use of the manufacturing method.

Data carriers, such as security or identity documents, in particular banknotes, credit cards or passports, or other forgery-prone security documents such as branded articles are provided with security elements for security, which allow a verification of the authenticity of the object or the data carrier and which at the same time serve as protection against unauthorized production , Such security elements often produce a highly visible visual impression, which allows a review of the security element even without technical aids, such as the naked eye. A security element can be embedded in such data carriers, for example in a banknote or in a chip card, or designed as a self-supporting transfer element, for example as a patch or label, which is applied to a data carrier or other object to be secured after its production. Alternatively, however, the security element can also be integrated into the data carrier during production, for example a security thread in banknotes.

For the purposes of the present invention, data carriers are in particular banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers which are subject to forgery such as passports or other identification documents and also card-shaped data carriers, in particular credit or chip cards, as well as production assurance elements such as Labels, seals, packaging and the like. The term "data carrier" also includes precursors, in particular non-executable precursors of such data carriers, which, for example in the case of security paper, are present in virtually endless form and are processed further at a later time. Such data carriers may contain windows or see-through windows which are covered with a foil which optionally forms a carrier for a security element.

In order to prevent forgery or reproduction of security elements, for example with high-quality color photocopiers, it is known to provide such security elements with transparency registers. Such transparency registers are usually designed as information-related motifs, for example as alphanumeric characters or other symbols which convey to a viewer certain information, possibly also abstract information. Such a motif is subdivided into a plurality of elements which are arranged on the front side and the back side of a suitable carrier substrate, so that these elements, when viewed in transmitted light, provide the desired motif. For this purpose, on the one hand, the motif elements on the front and rear sides of the carrier substrate must be applied partially overlapping or register-accurate, ie with sufficient accuracy of fit, on the front and rear side. This usually takes place in the simultaneous printing process, which permits high register accuracy of different printed layers, even on opposite sides of a carrier substrate. In the case of a viewing register, the registration accuracy of the motif elements applied to the front and rear sides of the carrier substrate can form a security feature that is difficult to imitate by a counterfeiter and easily checked by a user. Such transparency registers produced by the simultaneous printing process are based on either a completing or a partially overlapping printing of the elements of the see-through register on the front and back sides of the carrier substrate. In the case of the complete imprint, the elements of the see-through register are arranged in registration, ie in register, on the front and back so that in transmitted light at each point of the see-through register the light passes through only one printing layer, either on the back or on the front side of the carrier substrate. In other words, the elements of the see-through register in the region of the see-through register are completed in such a way that the light, when viewed in transmitted light, passes through the carrier substrate and exactly one printing layer. If the print layers applied to the front and back have the same color strength, the result is a see-through register with a light / dark contrast that is uneven in transmitted light. Therefore, it is preferable to reduce the color strength of the front-side reflection color (observation side) from the back-side reflection color.

In the case of partially overlapping printing of the elements of the see-through register, the elements are arranged, for example, at their edge area not exactly in register butt-to-joint, but have an overlapping area.

For the purposes of the present specification, an opaque layer has a low or no transparency in the entire visible wavelength range and / or the IR range (preferably up to a wavelength of 2.5 μm). Usually, for example, banknote paper which is printed on one side of the entire surface, as measured by means of a see-through densitometer on an opacity value of about 50 to 70%. The inks used for transparency tabs increase the opacity to about 80% to 95%. A transparent one Layer is also preferably clear and allows undisturbed observation of objects in the viewing direction behind the transparent layer. A translucent layer, on the other hand, noticeably reduces the intensity of the light passing through it, which is recognizable to a viewer, while at the same time light which is still recognizable passes through. It typically has a light transmission between 20% and 70% throughout the visible spectrum. A translucent layer can in principle be clear or cloudy or milky. It can be colorless or colored. The support substrate has a sufficiently high translucency, which allows a perception of the rear elements of the transparency register when viewed in transmitted light or review. At the same time, the carrier substrate has a sufficiently low translucency which prevents perception of the rear-side motif elements when viewed in incident light or plan view, so that only the elements of the see-through register which are at the front in the viewing direction are perceptible to a viewer in reflected light. The see-through register is preferably divided into front and back elements in such a way that, for example, the front-side elements convey to the viewer no information or information different from the see-through register. For the purposes of the present description, the terms "transmitted light" and "incident light" refer to the illumination in the visible wavelength range and / or in the IR range (preferably up to a wavelength of 2.5 μπι), possibly to subregions of the visible wavelength range and / or the IR range (preferably up to a wavelength of 2.5 μιη).

However, with the simultaneous printing process, no individualized or personalized transparency register can be created, since the elements of the transparency register are replaced by the artwork, for example the Pressure plates are fixed. Individualized and personalized imprints, on the other hand, can be easily made using a laser printer or an inkjet printer. However, these printing methods do not permit register-accurate printing on the front and rear sides of a carrier substrate, since simultaneous printing on the front and back sides of a carrier substrate is not possible with these printing methods and corresponding tolerances result through transfers of the carrier substrate between the various printing steps which prevent the creation of a transparency register of sufficient quality, ie with sufficient registration accuracy and / or register coverage.

It is also known to produce transparency registers in the form of recesses in superimposed layers by means of a laser irradiation. For this purpose, suitable lasers, such as UV, CO2, Nd: YAG or Nd: YV0 ₄ lasers are used and correspondingly suitable materials are used for the elements of the see-through register, which ablates, sublimates or chemically or physically changes the printed elements of the see-through register allow. By such a laser treatment, an individualized or a personalized transparency register can be created. At the same time, the remaining layers, for example a carrier substrate, are chosen such that no or at least no interaction with the laser radiation that is recognizable to a viewer takes place.

However, the information of the see through created by such a laser irradiation see-through register not only when viewed in transmitted light, but also in front or back side viewing in incident light directly recognizable, which is often undesirable. For this purpose, it is known from EP 1 054 778 to print an interference structure on the front and / or rear side of a carrier substrate in addition to such a see-through register created by laser treatment, which has a similar appearance to the see-through register in the case of supervisory observation, whereby the information of the see-through register is viewed in incident light to be hidden. However, this approach does not provide satisfactory results because, among other things, the success of this approach depends on the concrete see-through register, that is, for example, differs from banknote to banknote.

The present invention is therefore based on the object of specifying a security element for data carriers with an individualized transparent register whose information (see-through information) is not recognizable when looking at the incident light or is present only in fragments and therefore not completely readable. In the case of the detectability of the security element in the visible wavelength range, this is a security element which can be recognized by the naked eye and / or is mechanically recognizable. In the case of the detectability of the security element in the IR range is a (possibly only) machine-detectable security element. It is a further object of the invention to specify a corresponding production method and a suitable use of the production method.

This object is achieved by a security element, a manufacturing method and a use having the features of the independent claims. The dependent claims relate to preferred embodiments and further developments of the invention. The security element according to the invention initially comprises a translucent carrier substrate with a front side and a rear side. The carrier substrate is usually flat. Due to the translucency, a layer arranged in the viewing direction on the back side of the carrier substrate is largely or completely obscured when viewed from the front in the incident light. For this purpose, the translucent carrier substrate is preferably opaque in a plan view and possibly cloudy or milky. The carrier substrate can consist of paper, for example cotton paper, a paper-like material, or even of a film, for example a plastic film made of PET (polyethylene terephthalate), which is made opaque by a suitable coating or suitable additives in incident light.

On the translucent carrier substrate, a front side layer is arranged at least in a given region thereof, which is translucent or opaque, so that the applied front side layer can be seen in transmitted light for a viewer. The front side layer consists of a material which is changeable or ablatable by irradiation, for example by laser irradiation. In the given area, the front side layer is not applied over the entire area, but partially, that is fragmented, such that at least one application area in which the front side layer is applied is provided in the given area on the front side of the carrier substrate, and a recess in which the front side layer is not applied and in which thus the carrier substrate can be viewed directly. Likewise, a backside layer is applied to the back of the translucent carrier substrate, which in turn is translucent or opaque, can be changed or ablated by irradiation, for example by laser irradiation, and which in turn is applied fragmented in the given region of the carrier substrate. Preferably have front and / or back in the given Area a plurality of application areas and a plurality of recesses of the front side layer and / or backside layer. In this case, the at least one recess and the at least one application region of the front and back side layer are arranged in the given region of the carrier substrate such that at least one application region of front side layer or back side layer is arranged at each point of the given region. Thus, in the given range, when viewed in transmitted light, a transmission which is less than the transmission of the translucent carrier substrate results, since the transmitted light in each case passes through an application region of the front side layer and / or backside layer. The application areas of the front side layer and the back side layer can be arranged completely or partially overlapping. In the given area, there is also a motif generated by irradiation, preferably by laser irradiation. The irradiation, for example the parameters of the laser irradiation, and the carrier substrate are selected in such a way that the carrier substrate does not change optically upon irradiation. The irradiation is further selected such that the desired change or the desired ablation of the front side layer and / or the back side layer results during irradiation. If the application areas of the front side layer and the back side layer overlap at an irradiated point in the given area, then both layers are changed or ablated. The change is chosen such that there is an increased transmission of the irradiated areas of the front side layer and / or the back side layer in the transmitted light. The motif generated by irradiation is arranged in the given area in such a way that the motif extends over both the at least one application area and the at least one recess of the front side layer and / or back side layer. Since there is at least one application area of front side layer and rear side layer at each point of the given area, at least one of the two layers is changed or ablated at each point of the motif to be applied. At locations of the given area where the overlay areas of the front and back layers overlap, these irradiated areas are accurately changed or ablated.

The security element according to the invention and the production method according to the invention allow, with the aid of the irradiation, to generate an individualized or personalized see-through register in the form of a motif which, in the transmitted light due to the change or ablation, has an imprint

Compared to the surrounding area, that is the background of the subject, increased transmission, that is light transmission, shows. At the same time is achieved by the inventive arrangement of the subject, which extends over the respective at least one application area and the respective at least one recess of front side and / or back layer, that at Auflichtlichtrachtung both on the back and on the front of the security element by Radiation generated motif is only partially visible. Therefore, the transmitted light recognizable information of the see-through register is not anticipated by a reflected light observation. In other words, the information that gives the complete irradiation-generated motif to a viewer differs from the information perceptible to a viewer when viewed in incident light. The condition according to the invention, according to which at least one application area of the front-side layer or the back-side layer is arranged at each point of the given area, relates to the design of the security element before the irradiation. Even though there is local ablation of the front and back layers due to the irradiation, these clear-view-creating recesses are clearly distinguishable from recesses which would result from overlap of recesses in the pre-irradiation front-side and back-side layers since one was made Irradiation can also be detected on the finished product, for example, on the contour sharpness of the ablated by irradiation areas, on traces of smoke or on preferably optically imperceptible changes in the carrier substrate. In a preferred embodiment, in each case at least one application region of the front side layer and the back side layer does not overlap in the given region. In the case of a plurality of application areas of the front side layer and / or the back side layer within the given area, the plurality of application areas of the front side layer and the back surface layer do not overlap so that exactly one application area of either the front side layer or the back surface layer is located at each location of the given area. When viewed in transmitted light, this complete configuration of the application areas does not result in a disturbing reduction of the translucency of the security element in overlapping areas of the application areas or of the respectively at least one application area of the front side layer and the back side layer, which improves the visual impression for the viewer since, for example, when viewed in transmitted light - apart from the motif introduced by irradiation - gives a uniform shade of gray. Different materials are available for the front and back layers. For example, the front and back layers may be color layers containing laser absorbing materials, eg, carbon black, graphite, aluminum flakes, or milori blue, which absorb at 1064 nm, for example. Backside and front side layer can also be formed as a metallic layer, for example as an aluminum layer, which can be ablated by laser. Furthermore, the fragmentation of the front surface layer and the back surface layer according to the present invention can be realized by various application methods. In the simplest case, a color layer in the simultaneous printing or blanket-blanking process is applied to the front side and the back side of the carrier substrate, whereby the required fragmentation and in particular a complete printing of the front side and back side layer can be easily realized , Alternatively, a washing ink can be applied by means of the abovementioned printing methods on the front and rear side of the translucent carrier substrate, onto which surface the front side layer and / or rear side layer are then applied over the whole area. Subsequently, the

Washing paint with washing solution broken while the overlying front side or backside layer peeled off, resulting in the desired fragmentation of front and back side layer. Such washing processes are described, for example, in EP 1 972462 and the prior art mentioned therein, in particular EP 1 023 499, the corresponding disclosure of which is hereby incorporated into the following specification. The use of this washing method is particularly advantageous for security elements in the form of film strips such as security strips. With the mentioned methods, instead of a pressure or Washing ink but also an adhesive layer are applied in regions on the translucent carrier substrate. In this case, the adhesive layer is applied at the locations which are provided as application areas of front side and / or rear side layer. After the adhesive layer has been applied, the carrier substrate is pressed against a metal layer or an otherwise suitable layer so that the metal or other layer bonds with the applied adhesive layer and remains on the carrier substrate, but can be removed again in the other places. This process corresponds to the so-called cold foil application.

Alternatively, the application areas of the fragmented front side layer and / or rear side layer can first be produced on a film element and then applied to the translucent carrier substrate, for example as a transfer element. In this case, the applied layer may be a paint film. However, it is also possible to apply other layers, for example layers constructed in a complex manner or provided with additional information, such as layers with embossing information in the form of matt / gloss effects, holographic structures, Colorshiftfarben, infrared-absorbing or luminescent colors or other structured, such as screened lacquer or metal films. This process is also referred to as film application, which may be both a hot and a cold foil application. In the case of hot-foil application, the layer to be transferred is applied to the translucent carrier substrate by means of a heat sealing lacquer layer and the carrier foil of the foil element is then removed. In the case of cold foil application, by contrast, as already outlined above, an adhesive layer is firstly generated on the translucent carrier substrate in regions, with the adhesive layer being located at locations which correspond to application areas of the fragmented front side layer and / or back side layer. chen. The application of the adhesive layer can be done, for example, in the simultaneous printing process or in Offsetrollendruckverfahren. The side of the translucent carrier substrate acted upon by the adhesive layer is then pressed over the entire surface against an eg metallized film or another suitably coated carrier so that, for example, the metallization remains on the area exposed to the adhesive layer after detachment of the metallized film.

If the fragmented front-side layer and / or back-side layer is transferred in a film application or transfer process, it is preferable to provide partially overlapping application of the front-side and back-side layer application areas, since the registration accuracy of the generated application areas may be small. In general, the front and back layers can be constructed differently. In particular, the front side and rear side layers can be constructed differently in that they can be differently influenced by laser exposure in different spectral ranges. However, front side and back side layers are preferably of the same type, for example metal layers or ink layers with an optionally different color impression. Likewise, front and back layers can be applied to the carrier substrate by various methods. However, front side and back side layers are preferably applied using the same method, particularly preferably in one method step, for example in the simulant printing method.

In a preferred embodiment of the security element according to the invention, not only the motif created by irradiation forms a transparent but also the fragmented front and back layers form another see-through register. In the simplest case, the at least one application region of the front side layer then forms an element of the further transparent register. Likewise, the at least one application area of the backside layer also forms an element of the further see-through register. Both layers then complement each other in transmitted light to the other transparent register. In this preferred embodiment, the given area corresponds to the area of the further transparent register. Alternatively or additionally, the at least one application area of the

Front side layer or optionally the plurality of application areas of the front side layer form a supervisory motif, which is perceptible when viewing the security element in incident light. In this case, the at least one application region of the backside layer or the plurality of application regions of the backside layer preferably also forms a topographical motif, which is particularly preferably the negative of the topographical motif of the front side layer. Thus, the inventive radiation-generated see-through register is combined with a known static read-through register.

In a preferred embodiment of the security element according to the invention, a motif is repeated with the motif created by irradiation, which motif is already located elsewhere in the security element or the data carrier. For this purpose, for example, on such a data carrier imprinted ciphers, such as serial numbers, in question, which individualize a document of value, such as a banknote, a check or a passport. Such a numbering can be completely or partially repeated by the inventive motif generated by irradiation. For example, the irradiation-generated moiety according to the invention repeats tiv the last digit, a certain number of digits, a check digit or a letter of the number. Furthermore, it is possible, for example, to repeat a terminal digit "5" as the written-out word "five" in the look-through register. Another variant is, for example, the repetition of an Arabic numeral in the form of a Roman numeral. Likewise, for example, a two-dimensional or a three-dimensional barcode of the value document can be repeated within the subject generated by irradiation. Furthermore, the transparency register according to the invention offers the possibility of repeating an individualizing or personalizing information, for example an image motif. These possibilities can also be combined. This repetition provides an additional opportunity for visual and / or machine verification of the data carrier. A further advantage of the invention lies in the fact that so-called "composed counterfeits" are made more difficult. "Compound counterfeiting" refers to counterfeiting caused by separation of the substrate layers, ie by separation of the front side from the back side and combination of the front side or rear side obtained with a In order to provide the security element according to the invention, the counterfeit substrate layer would have to be applied precisely to the original counterpart, which is hardly feasible without offset in practice (especially in the visible wavelength range is difficult to achieve It is almost impossible to accomplish this in the IR range.) In addition, the offset can be detected in a bean node processing system by means of a suitable sensor system (which is, for example, scanner-based or camera-based). Further exemplary embodiments and advantages of the invention are explained below by way of example with reference to the accompanying figures. The examples represent preferred embodiments which in no way limit the invention. The figures shown are schematic representations that do not reflect the real proportions, but serve an improved clarity of the various embodiments.

The figures show in detail: FIG. 1 a banknote with a security element; FIG.

Fig. 2a - 2d a first embodiment of the security element;

Fig. 3a, 3b, a second embodiment of the security element;

4a - 4c, a third embodiment of the security element; and

5a-5c representations of an example of real pattern of the security element according to the invention.

In FIG. 1, a banknote 1 with a security element 2 is shown as data carrier. In addition to the security element 2 is located on the banknote 1, the printed denomination "50".

In the figures 2a to 2d, a first embodiment of a security element 2 is shown, and outlined its preparation. FIG. 2 a shows a cross section through the security element 2 before the irradiation. The security element 2 comprises a translucent carrier substrate 3 with a fragmented front side layer 4 and a fragmented backside layer 5. The fragmented front side layer 4 has application areas 4a and recesses 4b. Likewise, the fragmented backside layer 5 has application areas 5a and recesses 5b. The application areas 4a, 5a and recesses 4b, 5b of the front side layer 4 and the back side layer 5 are arranged such that exactly one application area 4a, 5a of front side layer 4 or rear side layer 5 is arranged at each location of the translucent carrier substrate 3. In this respect, the fragmented front side layer 4 and the fragmented backside layer 5 are arranged to be complete. The application area 4a preferably has a lighter color shade than the application area 5a, so that viewed in the transmitted light from the side 4 shows an identical or similar dark level and thereby sets a uniform homogeneous impression. The translucent carrier substrate 3 is made of paper, which has a suitable layer thickness, so that the carrier substrate is opaque when viewed in reflected light. For front-side viewing in incident light, therefore, only the application areas 4a of the front-side layer 4 are perceived on the carrier substrate, and only the application areas 5a of the back-side layer 5 are perceived when the rear side is viewed by reflected light.

Subsequently, the security element is irradiated substrate with a Nd: YAG laser with a wavelength of 1064 nm perpendicular to the translucent substrate substrate. As a result of the laser irradiation, both the front side layer 4 and the back side layer 5 are changed in such a way that they become transparent. The laser-treated regions are identified by the reference numeral 6 in the cross-section of FIG. 2b.

FIG. 2c shows a plan view of the front side of the laser-treated security element. From a viewer can continue the un- treated job areas 4a of the front side layer 4 are perceived. In the other regions, the translucent carrier substrate 3 is perceived, which is not covered in the region of the recesses 4a and is covered in the laser-treated regions 6 with the front side layer 4, which is now translucent after the laser treatment.

FIG. 2d shows a view through the laser-treated security element from FIG. 2b. In this case, only the laser-treated regions 6 are perceived as regions with high translucency, which corresponds to the transmission of the carrier substrate 3, while the non-laser-treated regions are perceived as regions with a low translucency, the translucency resulting from the transmission of the translucent carrier substrate 3 as well the transmission of the front side layer 4 or the backside layer 5 results.

In the figure 3a, a second embodiment of a security element 2 is shown in cross section. In turn, a fragmented front side layer 4 and a fragmented backside layer 5 are arranged on a translucent carrier substrate 3. In contrast to the first exemplary embodiment, however, the application areas 4a, 5a of the front side layer 4 and back side layer 5 overlap in the overlapping areas 7. The fragmented front side layer 4 and the fragmented back side layer 5 are thus arranged partially overlapping. In Figure 3b, the second embodiment is shown in transmitted light. This results in the areas 7 a low translucency, since in these areas, the translucency of the transmission of the translucent carrier substrate 3 and the transmission of front side layer 4 and backside layer 5 depends, while in the surrounding areas, the translucency of only the transmission of translucent support substrate 3 and the transmission of either the front side layer 4 or the backside layer 5 depends.

In the figures 4a to 4c, a third embodiment of a security element 2 is shown. In Figure 4a, the structure of the security element 2 is explained for better understanding. It consists of different application areas 4a, 5a of the front-side layer 4 and the back-side layer 5, which are arranged so as to be complete, so that application areas 4a of the front-side layer 4 correspond to recesses 5b in the backside layer and vice versa. Furthermore, a motif 6 is introduced into two adjoining application areas 4a and 5a by laser treatment. In Figure 4b, the third embodiment is shown in transmitted light. In this case, the application areas 4a and 5a of the front side layer 4 and back layer 5 complement each other to a see-through register in the form of the number "10". As a result of the laser treatment, the front side layer 4 and the back side layer 5 are ablated in regions, so that an increased translucency in comparison with the surrounding area results in this area. Accordingly, in the transmitted light, the motif 6 produced by laser treatment is completely visible. FIG. 4 c shows a plan view of the front side of the security element 2. When viewed in reflected light, only the application areas 4a of the front side layer 4 can be seen. Since the motif 6 introduced by laser treatment extends over an application area 4a and a recess 4b of the front side layer 4, only a part of the motif 6 can be perceived in a plan view.

In further embodiments, which are similar to those in FIGS. 2 a to 2 d, the information 4 a and 5 a applied on the front and back are implemented as small solid surfaces or as rasterized surface regions, for example in the form of a dot or line raster. The front and / or back Color applied on the side can also contain components which can not be completely removed by means of a laser, so that, for example, after the laser marking, a bright color is still retained. Thus, for example, a color mixture of milori blue and a red pigment Red 146 could be used, whereby the red pigment is retained after laser irradiation. In this way, hue differences associated with differences in transparency can be provided. In particular, the color applied to the front and / or back can contain components in which only the IR-absorbing component is removed on laser irradiation.

In a further embodiment, the element produced by printing technology may additionally contain a negatively omitted additional motif on the front and / or rear side, which disturbs the generated transparency information only insignificantly. This element may be ornamental accessory outside the laser-marked area or present within the laser-marked area and thereby further disturb the readability of the generated see-through information on the front and / or rear side in supervision. In case the additional element is outside the laser-marked area, the additional element may be a positive or negative motif.

Furthermore, the element produced by printing technology can additionally be equipped with a further security feature which does not or only insignificantly influences the laser marking. This can be, for example, a luminescent and / or a magnetic feature substance. Likewise, the security element provided according to the invention can have an overprint of a visually transparent and transparent to the laser interference color. The overpressure may include, for example, iriodines such as T1O2 coated mica or SiO2 pigments, or liquid crystal pigments. According to the invention, for example, complete security features can be provided in which a part is visible or readable in incident light, and a further part can only be recognized or read in transmitted light. This is preferably possible by means of laser, since it can preclude the Passerschwankungen different process steps.

FIGS. 5a to 5c show examples of real patterns of a security element according to the invention. In FIG. 5a, the supervisory information is shown as viewed from the front, FIG. 5b as the supervisory information viewed from the rear, and FIG. 5c for the viewing information viewed from the front ,

Claims

Patent claims

1. security element (2) for a data carrier (1) comprising a translucent carrier substrate (3) having a front side and a rear side, a front, a translucent or an opaque, by irradiation, preferably by laser irradiation, changeable or ablatable front side Layer (4), which is applied fragmented in a given area of the carrier substrate, such that in the given area at least one recess (4b) and at least one applicator area (4a) of the applied front side layer is arranged, one on the back applied, translucent or opaque , by irradiation, preferably by laser irradiation, changeable or ablatable backside layer (5), which is applied fragmented in the given area, such that at least one recess (5b) and at least one application area (5a) of the applied backside layer is arranged in the given area, where at every point of the given Bere At least one application area of the front side layer or an application area of the backside layer is arranged, furthermore comprising a motif (6) which is generated by irradiation, preferably by laser irradiation, which has an increased transmission and which extends over the at least one recess and the at least one application area the front side layer and / or the backside layer extends.

2. Security element according to claim 1, wherein the complete readability of the treated by means of laser irradiation motif is given only in review, so that by viewing the front and / or back in No premature anticipation of the full information is possible, and wherein the terms see-through and incident light in particular on the entire visible wavelength range and / or the IR range, preferably up to 2.5 μηι relate.

3. Security element (2) according to claim 1 or 2, characterized in that the carrier substrate (3) is opaque in plan view and / or consists of paper or a paper-like material that the motif (6) is an individualized or personalized motif, in that the front side layer (4) and / or the back side layer (5) are in the form of a color layer or metal layer and / or that the front side layer and / or the back side layer are fragmented, fragmentarily printed or printed over the entire surface and fragmented by the washing process.

4. Security element (2) according to one of claims 1 to 3, characterized in that the increased transmission of the motif (6) generated by irradiation by a change or a recess in the at least one application region (4a, 5a) of front side layer (4). and / or backside layer (5) is formed and the change or recess is formed with exact overlap when overlapping the at least one application area in front side layer and backside layer.

5. Security element (2) according to one of the preceding claims, characterized in that at each point of the given area exactly one application area (4a, 5a) of the front side layer (4) or the back side layer (5) is arranged.

6. Security element (2) according to one of the preceding claims, characterized in that the at least one application area (4a, 5a) of the Front side layer (4) and / or the back side layer (5) are each formed as a supervisory motif and / or form elements of a see-through register.

7. Security element according to claim 6, wherein the generated motifs for the see-through register are formed as a positive and / or negative motive.

8. Security element (2) according to one of the preceding claims, characterized in that in the predetermined area a plurality of application areas (4a, 5a) of the front side layer (4) and / or the backside layer (5) are formed and these application areas preferably a supervisory motif , Make elements of a look-through register or a see-through register.

9. Security element (2) according to one of the preceding claims, characterized in that the motif (6) the security element or the data carrier (1) individualized or personalized.

10. A method for producing a security element (2) for a data carrier (1), comprising the steps:

Providing a translucent carrier substrate (3) with a front side and a rear side,

- Applying a translucent or opaque, by irradiation, preferably laser irradiation, changeable or ablatierbaren front side layer (4) on the front, wherein the front side layer is applied fragmented in a given area of the support substrate or fragmented later, such that in the given area at least one recess (4b) and at least one application area (4a) of the applied front side layer is arranged, - Applying a translucent or opaque, by irradiation, preferably by laser irradiation, changeable or ablatierbaren backside layer (5) on the back, wherein the backside layer in the given area is fragmented or later fragmented, so that in the given area at least one recess ( 5b) and at least one application region (5a) of the applied backside layer is arranged, wherein at each point of the given region at least one application region of the front side layer or an application region of the backside layer is arranged, and

Irradiating the security element, preferably by laser, such that a motif (6) with increased transmission is produced, which extends over the at least one recess and the at least one application area in the front side layer and / or the back side layer.

A method according to claim 10, characterized in that the step of fragmenting the front side layer (4) and / or the back side layer (5) by fragmentarily printing a colored layer or adhesive layer, preferably with a simultaneous printing method, by applying a fragmented dye layer. or metal layer, preferably by hot or cold foil application, or by full-surface application of a color or metal layer and subsequent fragmentation by washing process.

12. The method according to claim 10 or 11, characterized in that the increased transmission of the radiation generated motif (6) by a change or a recess in the at least one application area (4a, 5a) of front side layer (4) and / or backside layer ( 5) is formed, wherein the change or recess in overlap the at least one application area in the front-side layer and the back-side layer is formed in register.

13. The method according to any one of claims 10 to 12, characterized in that at each point of the given area exactly one application area (4a,

5a) of the front side layer (4) or the back side layer (5) is arranged.

14. The method according to any one of claims 10 to 13, characterized in that the at least one application area (4a, 5a) of the front side layer (4) and / or the backside layer (5) are each formed as a view images and / or form elements of a see-through register ,

15. The method according to any one of claims 10 to 14, characterized in that in the predetermined area a plurality of application areas (4a,

5a) of the front side layer (4) and / or the back side layer (5) are formed and these application areas form a supervisory motif, elements of a see-through register or a see-through register.

16. Use of the method according to one of claims 10 to 15 for individualizing or personalizing a security element (2) or a data carrier (2) with a security element.