Manufacturing method of anti-counterfeiting coding element

Abstract

The invention provides a manufacturing method of an anti-counterfeiting coding element, which comprises the following steps that: fluctuating structure layers with different hollow indexes are formed in different areas in an anti-counterfeiting coding element area of a base material, and the hollow index of the fluctuating structure layer in a second area is different from the hollow index of the fluctuating structure layer in a third area; forming a functional layer on the surface of one side, away from the base material, of the fluctuating structure layer; protective layers with different protection indexes are formed in different areas of the surface of the side, away from the base material, of the functional layer, and the protection index of the protective layer in the first area is different from the protection index of the protective layer in the second area; the functional layer in the second area of the structure is removed, at least part of the functional layer in the first area and the functional layer in the third area are reserved to form an anti-fake coding element, and the difference between the first area and the second area forms a readable coding pattern in the second area. The anti-counterfeiting coding element solves the problems of poor anti-counterfeiting performance and high manufacturing cost of the anti-counterfeiting coding element in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of anti-counterfeiting technology, and in particular to a method for manufacturing an anti-counterfeiting coding element. Background Art

[0002] Counterfeit and imitation products have seriously damaged the legitimate rights and interests of product producers and users. With the rapid development of the economy, products on the market have become more abundant and diverse, and the demand for authenticity identification and production link traceability has become stronger.

[0003] At present, text, barcodes, and QR codes containing product information or numbers are widely used in product production, transportation, warehousing, sales, use, traceability, and anti-counterfeiting. They have the advantages of being readable by the naked eye or machines and easy to integrate. However, text, barcodes, QR codes, etc. can be easily copied directly, and the threshold for imitation is low, so their anti-counterfeiting capabilities need to be enhanced.

[0004] Among various optical anti-counterfeiting technologies, the anti-counterfeiting effects formed by microstructures include diffraction, interference, reflection, refraction, sampling and other effects, which are widely used because of their high brightness and obvious dynamic effects. However, the platemaking cost of microstructures is very high, and a large number of copies are required to spread the cost. The copies have the same pattern and information and are difficult to customize.

[0005] That is to say, the anti-counterfeiting coding elements in the prior art have the problems of poor anti-counterfeiting performance and high production cost. Summary of the invention

[0006] The main purpose of the present invention is to provide a method for manufacturing an anti-counterfeiting coding element to solve the problems of poor anti-counterfeiting performance and high manufacturing cost of the anti-counterfeiting coding element in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a method for manufacturing an anti-counterfeiting coding element is provided, the method for manufacturing an anti-counterfeiting coding element can simultaneously manufacture multiple anti-counterfeiting coding elements, and the coding patterns of at least two of the multiple anti-counterfeiting coding elements are different, the substrate has at least one anti-counterfeiting coding element area forming the anti-counterfeiting coding element, the anti-counterfeiting coding element area has a first area, a second area and a third area, the difference between the first area and the second area forms a readable coding pattern, the method for manufacturing the anti-counterfeiting coding element comprises: forming an undulating structure layer with different hollowing indexes in different areas within the anti-counterfeiting coding element area of ​​the substrate, wherein the hollowing index of the undulating structure layer in the second area is different from the hollowing index of the undulating structure layer in the third area; forming a functional layer on the surface of the undulating structure layer away from the substrate; forming a protective layer with different protection indexes in different areas of the surface of the functional layer away from the substrate, wherein the protection index of the protective layer in the first area is different from the protection index of the protective layer in the second area; removing the functional layer in the second area of ​​the above-mentioned structure, and the functional layer located in the first area and the third area is at least partially retained to form the anti-counterfeiting coding element, wherein the difference between the first area and the second area forms a readable coding pattern in the second area.

[0008] Furthermore, the process of forming the undulating structure layers with different hollowing indexes in different regions of the substrate includes: the hollowing index of the undulating structure layer formed in the third region is smaller than the hollowing index of the undulating structure layer formed in the second region.

[0009] Furthermore, the process of removing the functional layer in the second area of ​​the above structure includes: placing the structure with the protective layer in a removal solution, removing the functional layer in the second area, wherein the functional layer located in the second area with a larger hollowing index is easy to remove.

[0010] Furthermore, the process of forming protective layers with different protection indexes in different regions on the surface of the functional layer away from the substrate includes: the protection index of the protective layer formed in the first region is greater than the protection index of the protective layer formed in the second region.

[0011] Furthermore, the process of removing the functional layer in the second region of the above structure includes: placing the structure with the protective layer in a removal solution to remove the functional layer in the second region, wherein the protective layer in the second region with a smaller protection index is easy to remove.

[0012] Furthermore, the process of forming protective layers with different protection indices in different areas of the surface of the functional layer away from the substrate includes the following steps in interchangeable order: forming a protective layer on one surface of the substrate for the first time; and forming a protective layer on one surface of the first area for the second time.

[0013] Furthermore, the hollowing index includes at least one of the depth of the undulating structure, the specific volume of the undulating structure, and the aspect ratio of the undulating structure.

[0014] Furthermore, the functional layer includes at least one of a metal layer, a dielectric layer, an absorption layer, and a magnetic layer.

[0015] Furthermore, the protection index includes at least one of the thickness of the protective layer, the density of the protective layer, the alkali resistance of the protective layer, the acid resistance of the protective layer, and the resistance of the protective layer to organic solvents.

[0016] Furthermore, the difference between the first region and the second region includes at least one of a difference in appearance, a difference in light transmittance, and a difference in magnetism.

[0017] Furthermore, the coding pattern includes at least one of numbers, letters, barcodes, and QR codes.

[0018] Furthermore, the method of forming the protective layer includes at least one of coating, printing, inkjet, laser printing, and numbering machine printing.

[0019] Furthermore, the substrate has a plurality of anti-counterfeiting code element regions.

[0020] Furthermore, the process of dividing the substrate into the first area, the second area and the third area includes: spreading out the wound substrate portion to divide the substrate into multiple anti-counterfeiting code element areas; and dividing the first area, the second area and the third area in each anti-counterfeiting code element area.

[0021] According to another aspect of the present invention, a method for manufacturing an anti-counterfeiting coding element is provided. The method for manufacturing an anti-counterfeiting coding element can manufacture multiple anti-counterfeiting coding elements at the same time, and the coding patterns of at least two of the multiple anti-counterfeiting coding elements are different. The substrate has at least one anti-counterfeiting coding element area forming the anti-counterfeiting coding element, and the anti-counterfeiting coding element area has a first area and a second area. The difference between the first area and the second area forms a readable coding pattern. The method for manufacturing the anti-counterfeiting coding element comprises: forming a functional layer on the substrate; forming a protective layer on the functional layer, wherein the protection index of the protective layer in the first area and the second area is different; placing the above structure in an atmosphere that can react with the functional layer until the functional layer in the second area is removed, the functional layer in the first area is at least partially retained, and the difference between the first area and the second area forms a readable coding pattern.

[0022] Furthermore, the process of forming the protective layer on the functional layer includes: a protection index of the protective layer formed in the first region is greater than a protection index of the protective layer formed in the second region.

[0023] By applying the technical solution of the present invention, the method for manufacturing an anti-counterfeiting coding element can manufacture multiple anti-counterfeiting coding elements, and the coding patterns of at least two of the multiple anti-counterfeiting coding elements are different. The substrate has at least one anti-counterfeiting coding element area forming the anti-counterfeiting coding element, and the anti-counterfeiting coding element area has a first area, a second area and a third area, and the difference between the first area and the second area forms a readable coding pattern. The method for manufacturing the anti-counterfeiting coding element includes: forming an undulating structure layer with different hollowing indexes in different areas within the anti-counterfeiting coding element area of ​​the substrate, wherein the hollowing index of the undulating structure layer in the second area is different from the hollowing index of the undulating structure layer in the third area; forming a functional layer on the surface of the side of the undulating structure layer away from the substrate; forming protective layers with different protection indexes in different areas of the surface of the functional layer away from the substrate, wherein the protection index of the protective layer in the first area is different from the protection index of the protective layer in the second area; removing the functional layer in the second area of ​​the above-mentioned structure, and the functional layer located in the first area and the third area is at least partially retained to form the anti-counterfeiting coding element, wherein the difference between the first area and the second area forms a readable coding pattern in the second area.

[0024] The above-mentioned manufacturing method can be used to manufacture an anti-counterfeiting coding element with multiple anti-counterfeiting properties. The first area has a functional layer, and the second area does not have a functional layer. There is a difference between the two, and this difference forms a readable coding pattern between the two. At the same time, the first area and the third area both have an undulating structural layer and a functional layer, so that the first area and the third area both have an appearance that changes with the viewing angle, so that the anti-counterfeiting coding element has a high anti-counterfeiting performance and is not easy to be imitated. At the same time, the manufacturing method in this application has a simple process and low plate making cost, and can form anti-counterfeiting coding elements with multiple different coding patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 The structure diagram of the anti-counterfeiting coding element of the first embodiment of the present invention is shown;

[0027] Figure 2 The structure diagram of the anti-counterfeiting coding element of the second embodiment of the present invention is shown;

[0028] Figure 3 A diagram showing the manufacturing process of the anti-counterfeiting coding element according to the third embodiment of the present invention;

[0029] Figure 4 The diagram shows the manufacturing process of the anti-counterfeiting coding element according to the fourth embodiment of the present invention.

[0030] The above drawings include the following reference numerals:

[0031] 10. First region; 20. First functional layer; 30. Second region; 50. Third region; 60. Concave and convex structure layer; 70. Second functional layer; 80. Protective layer; 90. Transparent layer; 100. Substrate. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0035] In order to solve the problems of poor anti-counterfeiting performance and high manufacturing cost of anti-counterfeiting coding elements in the prior art, the present invention provides a method for manufacturing an anti-counterfeiting coding element.

[0036] like Figures 1 to 4As shown, the method for making an anti-counterfeiting coding element can make multiple anti-counterfeiting coding elements, and the coding patterns of at least two of the multiple anti-counterfeiting coding elements are different. The substrate 100 has at least one anti-counterfeiting coding element area forming the anti-counterfeiting coding element, and the anti-counterfeiting coding element area has a first area 10, a second area 30 and a third area 50. The difference between the first area 10 and the second area 30 forms a readable coding pattern. The method for making an anti-counterfeiting coding element includes: forming an undulating structure layer 60 with different hollowing indexes in different areas within the anti-counterfeiting coding element area of ​​the substrate 100, wherein the hollowing index of the undulating structure layer 60 in the second area 30 is different from that of the anti-counterfeiting coding element. The hollowing index of the undulating structure layer 60 in the third area 50 is different; a functional layer is formed on the surface of the undulating structure layer 60 on the side away from the substrate 100; protective layers 80 with different protection indexes are formed in different areas of the surface of the functional layer on the side away from the substrate 100, wherein the protection index of the protective layer 80 in the first area 10 is different from the protection index of the protective layer 80 in the second area 30; the functional layer in the second area 30 of the above structure is removed, and the functional layer located in the first area 10 and the third area 50 is at least partially retained to form an anti-counterfeiting coding element, wherein the difference between the first area 10 and the second area 30 forms a readable coding pattern in the second area 30.

[0037] The above-mentioned manufacturing method can be used to manufacture an anti-counterfeiting coding element with multiple anti-counterfeiting properties. The first area 10 has a functional layer, and the second area 30 has no functional layer. There is a difference between the two, and this difference forms a readable coding pattern between the two. At the same time, the first area 10 and the third area 50 both have an undulating structural layer 60 and a functional layer, so that the first area 10 and the third area 50 both have an appearance that changes with the viewing angle, so that the anti-counterfeiting coding element has a high anti-counterfeiting performance and is not easy to be imitated. At the same time, the manufacturing method in this application has a simple process and low plate making cost, and can form anti-counterfeiting coding elements with multiple different coding patterns.

[0038] The coding pattern is customizable, that is, the range, shape, and size of the first area 10 and the second area 30 are variable according to the customized coding pattern. For example, among multiple anti-counterfeiting coding elements produced in the same batch, different anti-counterfeiting coding elements have different first areas 10 and second areas 30, and the coding patterns formed are also different.

[0039] It should be noted that, in the process of removing the functional layer in the second area 30 of the above structure, the functional layer located in the first area 10 and the third area 50 is at least partially retained to form the anti-counterfeiting coding element, and the above structure refers to a structure with a protective layer 80.

[0040] Optionally, the process of forming the undulating structure layer 60 with different hollowing indexes in different regions of the substrate 100 includes: the hollowing index of the undulating structure layer 60 formed in the third region 50 is smaller than the hollowing index of the undulating structure layer 60 formed in the second region 30. The process of removing the functional layer in the second region 30 includes: placing the structure after the protective layer 80 is plated in a removal solution to remove the functional layer in the second region 30, wherein the functional layer in the second region 30 with a larger hollowing index is easy to remove. Setting the hollowing index of the undulating structure layer 60 formed in the third region 50 to be smaller than the hollowing index of the undulating structure layer 60 in the second region 30 is conducive to the removal of the functional layer in the second region 30.

[0041] In the present application, the process of forming protective layers 80 with different protection indexes in different areas of the surface of the functional layer away from the substrate 100 includes: the protection index of the protective layer 80 formed in the first area 10 is greater than the protection index of the protective layer 80 formed in the second area 30. The process of removing the functional layer in the second area 30 includes: placing the structure with the protective layer 80 in a removal solution to remove the functional layer in the second area 30, wherein the protection index of the protective layer 80 in the second area 30 is smaller, and such a setting is conducive to the removal of the functional layer in the second area 30, while the functional layers of the remaining structures will not be removed.

[0042] Specifically, the hollowing index includes at least one of the depth of the undulating structure, the specific volume of the undulating structure, and the aspect ratio of the undulating structure.

[0043] Specifically, the functional layer includes at least one of a metal layer, a dielectric layer, an absorption layer, and a magnetic layer.

[0044] Specifically, the protection index includes at least one of the thickness of the protective layer 80 , the density of the protective layer 80 , the alkali resistance of the protective layer 80 , the acid resistance of the protective layer 80 , and the resistance of the protective layer 80 to organic solvents.

[0045] Specifically, the difference between the first region 10 and the second region 30 includes at least one of a difference in appearance, a difference in light transmittance, and a difference in magnetism.

[0046] Specifically, the coding pattern includes at least one of numbers, letters, barcodes, and QR codes.

[0047] Specifically, the method of forming the protective layer 80 includes at least one of coating, printing, inkjet, laser printing, and numbering machine printing.

[0048] Specifically, the process of forming the protective layer 80 with different protection indexes in different regions of the surface of one side of the functional layer away from the substrate 100 includes: forming the protective layer 80 for the first time on the surface of one side of the substrate 100; and forming the protective layer 80 for the second time on the surface of one side of the first region 10. In this embodiment, there is only the protective layer 80 formed for the first time in the other regions, and the protective layer 80 formed for the first time and the protective layer 80 formed for the second time in the first region 10, or the protective layer 80 in the first region 10 is formed twice, so that the thickness of the protective layer 80 in the first region 10 is thicker.

[0049] It should be noted that the materials of the protective layer 80 formed for the first time and the protective layer 80 formed for the second time may be the same or different, and this is only to illustrate the formation method of the protective layer 80 in the first region 10 .

[0050] Specifically, the method for forming the protective layer 80 includes two steps: forming the protective layer 80 as a whole and forming the protective layer 80 separately in the first region 10. If the thickness of the protective layer in the second region 30 and the third region 50 is expected to be zero, the protective layer 80 can be formed separately only in the first region 10.

[0051] The method of integrally forming the protective layer 80 includes coating, and the coating process is suitable for uniformly forming a coating layer on the film roll.

[0052] Methods for forming the protective layer 80 separately in the first region 10 include inkjet, laser printing and / or a numbering machine, etc.

[0053] The inkjet process can accurately spray tiny ink droplets on the substrate 100 to be printed according to a preset pattern. Compared with printing processes such as gravure, offset printing, and screen printing, which can only print according to the pattern on the plate roller, the pattern printed by the inkjet process is controlled by a computer and can be changed in real time according to demand to achieve customized inkjet patterns. Similar variable printing processes include laser printing and numbering machines.

[0054] Optionally, the substrate 100 has a plurality of anti-counterfeiting code element regions.

[0055] Specifically, before different regions of the substrate 100 form the undulating structure layer 60 with different hollowing indexes, the method further includes: partially spreading out the wound substrate 100 to make multiple anti-counterfeiting coding elements on the substrate 100. In order to reduce the production cost, multiple anti-counterfeiting coding elements can be made on one substrate 100, and the multiple anti-counterfeiting coding elements on the same substrate 100 can be separated after production or when used. The winding method is that the substrate 100 is wound into a film roll, and the film roll is partially unfolded during the production process, and only the unfolded part is processed, and the processed part is then wound into a film roll. The winding method can continuously process a very long substrate 100 in a limited space, which is an effective method to significantly reduce production costs.

[0056] In an optional embodiment, the method for making an anti-counterfeiting coding element can make multiple anti-counterfeiting coding elements at the same time, and the coding patterns of at least two of the multiple anti-counterfeiting coding elements are different. The substrate 100 has at least one anti-counterfeiting coding element area forming the anti-counterfeiting coding element, and the anti-counterfeiting coding element area has a first area 10 and a second area 30. The difference between the first area 10 and the second area 30 forms a readable coding pattern. The method for making an anti-counterfeiting coding element includes: forming a functional layer on the substrate 100; forming a protective layer 80 on the functional layer, wherein the protection index of the protective layer in the first area 10 and the second area 30 is different; placing the above structure in an atmosphere that can react with the functional layer until the functional layer in the second area 30 is removed, the functional layer in the first area 10 is at least partially retained, and the difference between the first area 10 and the second area 30 forms a readable coding pattern. In this embodiment, multiple anti-counterfeiting coding elements with different coding patterns can be made, and the production method has a simple process and low plate making cost.

[0057] Specifically, in the process of forming the protective layer 80 on the functional layer, a protection index of the protective layer 80 formed in the first region 10 is greater than a protection index of the protective layer 80 formed in the second region 30 .

[0058] like Figures 1 to 4 As shown, the anti-counterfeiting coding element includes a substrate 100, a corrugated structure layer 60, a first functional layer 20 and a second functional layer 70, the substrate 100 has a first area 10, a second area 30 and a third area 50; the corrugated structure layer 60 is arranged on the substrate 100, and the corrugated structure layer 60 is arranged at least in the first area 10 and the third area 50; the first functional layer 20 is arranged on the corrugated structure layer 60 in the first area 10, so that the first area 10 has an appearance that is variable with the observation angle, and the difference between the first area 10 and the second area 30 forms a coding pattern; the second functional layer 70 is arranged on the corrugated structure layer 60 in the third area 50, so that the surface of the second area 30 has an appearance that is variable with the angle.

[0059] The undulating structure layer 60 and the first functional layer 20 are arranged in the first area 10 so that the first area 10 has an appearance that varies with the viewing angle, thereby increasing the anti-counterfeiting effect. No functional layer is arranged in the second area 30 so that the difference between the first area 10 and the second area 30 forms a coding pattern, thereby further increasing the anti-counterfeiting effect. The undulating structure layer 60 and the second functional layer 70 are arranged in the third area 50 so that the surface of the second area 30 has an appearance that varies with the angle, thereby again increasing the anti-counterfeiting effect of the anti-counterfeiting coding element. The coded anti-counterfeiting coding element in the present application has a variety of anti-counterfeiting features, thereby effectively increasing the anti-counterfeiting performance of the anti-counterfeiting coding element and reducing the risk of the anti-counterfeiting coding element being counterfeited.

[0060] It should be noted that the coding pattern is directly formed by the difference between the first area 10 and the second area 30. For example, there is a first functional layer 20 in the first area 10, and there is no functional layer in the second area 30, so that the appearance between the first area 10 and the second area 30 is different, so as to directly form the coding pattern.

[0061] In the present application, due to the presence of the undulating structure layer 60 and the first functional layer 20, the undulating structure layer 60 and the second functional layer 70, the appearance of the anti-counterfeiting coding element changes with the observation angle, which is significantly different from copying, printing, and the like, and the coded information cannot be forged or altered by conventional means.

[0062] In the third region 50, the relief structure layer 60 and the second functional layer 70 are precisely aligned, that is, the deviation of the relative positions is less than 10 micrometers.

[0063] Specifically, the appearance that changes with the observation angle includes at least one of color changing with the observation angle, brightness changing with the observation angle, pattern shape changing with the observation angle, pattern position changing with the observation angle, and pattern angle changing with the observation angle.

[0064] In the present application, the appearance that changes with the observation angle includes at least one optical anti-counterfeiting feature of holography, light-changing, dynamic, relief or microlens.

[0065] In the present application, the appearance that changes with the observation angle of the first area 10 is an appearance characteristic jointly formed by the undulating structure layer 60 and the first functional layer 20, and the appearance that changes with the observation angle of the third area 50 is an appearance characteristic jointly formed by the undulating structure layer 60 and the second functional layer 70. The combination of the undulating structure and the functional layer can integrate conventional anti-counterfeiting technologies, such as diffraction-based optical anti-counterfeiting technologies such as holograms, reflection-based optical anti-counterfeiting technologies such as micro-mirrors, and sub-wavelength microstructure-based optical anti-counterfeiting technologies such as structural colors.

[0066] Specifically, the hollowing index of the undulating structure layer 60 in the first area 10 is different from that of the undulating structure layer 60 in the third area 50. This arrangement makes the appearance of the first area 10 and the second area 30 different depending on the viewing angle. In this embodiment, the first area 10 and the undulating structure layer 60 are not precisely aligned, and there is a relative position fluctuation of 20 microns to 2000 millimeters.

[0067] Optionally, the first functional layer 20 and the second functional layer 70 include at least one of the same materials. Some of the materials in the first functional layer 20 and the second functional layer 70 may be the same, so that the first functional layer 20 and the second functional layer 70 have similar functions.

[0068] Preferably, the first functional layer 20 and the second functional layer 70 are made of the same material, so that the first functional layer 20 and the second functional layer 70 have the same function and are convenient for manufacturing the first functional layer 20 and the second functional layer 70 .

[0069] Specifically, the boundary of the second functional layer 70 is the boundary of the third region 50. That is, all positions in the third region 50 have the undulating structure layer 60 and the second functional layer 70 to ensure the consistency of the appearance characteristics in the third region 50, so that the shape of the third region 50 serves as an anti-counterfeiting feature.

[0070] Optionally, the first functional layer 20 and the second functional layer 70 are processed and formed in the same process. This arrangement reduces the processing steps, enables the first functional layer 20 and the second functional layer 70 to be formed at the same time, and reduces the production cost.

[0071] In the present application, the light emitted by the point light source passes through the second area 30 to form a reconstructed pattern.

[0072] In an optional embodiment, when the light emitted by the point light source illuminates the second area 30, when the human eye observes the point light source through the second area 30, the point light source is directly observed in the field of vision of the human eye.

[0073] In an optional embodiment, when the light emitted by the point light source illuminates the second area 30, it is transmitted or reflected to project a reconstructed pattern on the object.

[0074] In the present application, the appearance of the first area 10 that changes with the observation angle is associated with the appearance of the third area 50 that changes with the observation angle. The appearance association of the first area 10 and the third area 50 means that the appearances of the two areas change synchronously, such as the positions of the two areas change synchronously, the colors of the two areas change synchronously, the pattern shapes of the two areas change synchronously, the pattern angles of the two areas change synchronously, etc.

[0075] Optionally, the first functional layer 20 includes at least one of a metal layer, a dielectric layer, and a magnetic layer.

[0076] Optionally, the second functional layer 70 includes at least one of a metal layer, a dielectric layer, and a magnetic layer.

[0077] Specifically, the first functional layer 20 can be a single metal layer, a single dielectric layer, a single magnetic layer, or it can be formed by alternating metal layers and dielectric layers, such as metal layer-dielectric layer-metal layer, or it can be multiple dielectric layers, such as high refractive index dielectric layers and low refractive index dielectric layers alternately stacked.

[0078] When the first functional layer 20 and / or the second functional layer 70 is "metal layer-dielectric layer-metal layer", a light-variable feature is formed. The light-variable feature can be observed in different colors at different observation angles, and has the effect of changing the color with the observation angle.

[0079] When the first functional layer 20 and / or the second functional layer 70 are high refractive index medium layers and low refractive index medium layers alternately stacked, optically variable features are also formed.

[0080] Specifically, the second functional layer 70 can be a single metal layer, a single dielectric layer, a single magnetic layer, or it can be formed by alternating metal layers and dielectric layers, such as metal layer-dielectric layer-metal layer, or it can be multiple dielectric layers, such as high refractive index dielectric layers and low refractive index dielectric layers alternately stacked.

[0081] The single metal layer may be an aluminum coating.

[0082] Optionally, the first functional layer 20 may further include a reflective layer.

[0083] Optionally, the second functional layer 70 may further include a reflective layer.

[0084] In the present application, the first region 10 and the second region 30 have different anti-counterfeiting characteristics. That is, the anti-counterfeiting feature of the first region 10 is different from the anti-counterfeiting feature of the second region 30, so that the anti-counterfeiting coding element has diversified anti-counterfeiting features.

[0085] Optionally, the difference between the first region 10 and the second region 30 includes at least one of a difference in appearance, a difference in light transmittance, and a difference in magnetism.

[0086] The difference in appearance between the first region 10 and the second region 30 may be that the first region 10 and the second region 30 have different appearance properties such as shape, color, brightness, gloss, etc. Of course, as long as there is a difference in appearance properties, it means that the first region 10 and the second region 30 have different appearances. For example, if the first region 10 has a metallic appearance and the second region 30 has a transparent appearance, it can be said that the two have different appearances.

[0087] Specifically, the difference in appearance between the first region 10 and the second region 30 is mainly caused by the presence or absence of a functional layer. In the present application, the first region 10 has a first functional layer 20, while the second region 30 has no functional layer. Because the first region 10 has the first functional layer 20, when the first functional layer 20 is directly disposed on a flat surface, the appearance of the first region 10 is a mirror effect or a mirror-like effect; when the first functional layer 20 is directly disposed on an undulating surface, the appearance of the first region 10 may have different brightness and / or color distributions depending on the viewing angle; when the first functional layer 20 is a two-layer or multi-layer coating, the appearance of the first region 10 may have different colors depending on the viewing angle. The second region 30 has no functional layer, and thus the second region 30 presents a transparent appearance or the appearance of a structure behind the micro-image.

[0088] When the difference between the first area 10 and the second area 30 is the difference in light transmittance, it means that when observed in transmission, the first area 10 and the second area 30 have different light transmittance properties, and the coding pattern can be seen. Transmission observation means that the observation position and the light source are on different sides of the anti-counterfeiting coding element.

[0089] When the difference between the first region 10 and the second region 30 is a difference in magnetic properties, the encoding patterns of the first region 10 and the second region 30 obtained by the corresponding magnetic device sides are different.

[0090] Specifically, the coding pattern includes at least one of numbers, letters, barcodes, and two-dimensional codes, wherein the two-dimensional code may be a common two-dimensional code or a QR (Quick Response) code.

[0091] Furthermore, when there are multiple anti-counterfeiting coding elements, the coding patterns of at least two of the anti-counterfeiting coding elements are different. The coding patterns of at least two anti-counterfeiting coding elements are different. When making the anti-counterfeiting coding element, multiple anti-counterfeiting coding elements are made together on the same substrate 100, and in the process of making, the coding patterns of at least two anti-counterfeiting coding elements are different. Of course, the coding patterns of the multiple anti-counterfeiting coding elements can also be different. Since the coding pattern is only caused by the presence or absence of a functional layer between the first area 10 and the second area 30, it does not increase the difficulty of making the anti-counterfeiting coding element.

[0092] Optionally, the coding pattern can be customized. The coding pattern can be a special pattern designed according to specific usage needs. Of course, each coding pattern can be unique.

[0093] It should be noted that the coding pattern can be customized to include the same batch of anti-counterfeiting coding elements having different coding patterns.

[0094] In an optional embodiment, the first functional layer 20 in the first region 10 is directly disposed on the substrate 100, or the relief structure layer 60 is only in the third region 50. Meanwhile, the first functional layer 20 and the second functional layer 70 are the same structure layer.

[0095] In another optional embodiment, the second region 30 further has an undulating structure layer 60 , and the hollowing index of the undulating structure layer 60 in the second region 30 is different from that of the undulating structure layer 60 in the third region 50 .

[0096] Optionally, when the undulating structure layer 60 is a periodic striped undulating structure, the undulating structure layer 60 cooperates with the first functional layer 20 and / or the second functional layer 70 to form a holographic feature. The holographic feature can be observed as a shining rainbow color at a specific angle, and the rainbow color is observed to change rapidly when the observation angle is slightly changed. The holographic feature has the effect of changing the color and the brightness distribution with the observation angle.

[0097] A series of reflective surfaces with characteristic orientations are formed in the first area 10 and / or the third area 50, or a series of holographic stripes with specific periods and orientations are combined to form dynamic features and / or relief effects. The dynamic effect and / or relief effect can observe different brightness distributions at different observation angles, and these brightness distributions can also form patterns, and the patterns present different shapes, sizes, and angles at different observation angles. The dynamic effect and / or relief effect has the effects of brightness distribution that changes with the observation angle, pattern shape that changes with the observation angle, pattern position that changes with the observation angle, and pattern angle that changes with the observation angle.

[0098] In an optional embodiment, the anti-counterfeiting coding element further includes a sampling layer, which is disposed on the first functional layer 20 and the second functional layer 70, and the sampling layer can sample the patterns on the first functional layer 20 and the second functional layer 70 to form microlens features. The microlens features have the effects of changing the pattern shape, changing the pattern position, and changing the pattern angle with the observation angle.

[0099] exist Figure 1 In the particular embodiment shown, the second region 30 is disposed continuously around the periphery of the first region 10 and the third region 50 .

[0100] In the present application, the above-mentioned anti-counterfeiting coding element is made by a method for making an anti-counterfeiting coding element, and the method for making an anti-counterfeiting coding element includes: forming a corrugated structure layer 60 on a substrate 100, wherein the hollowing index of the first area 10, the part of the second area 30 close to the first area 10, and the third area 50 is smaller than the hollowing index of the second area 30 close to the third area 50; forming a functional layer; forming a protective layer 80; after forming the protective layer 80, placing the above-mentioned structure in an atmosphere capable of reacting with the functional layer until part or all of the functional layer located in the second area 30 is removed; after forming the functional layer, using a light beam and / or a particle beam to remove the functional layer on the part of the second area 30 close to the first area 10.

[0101] Embodiment 1

[0102] exist Figure 1 In the specific embodiment shown, the anti-counterfeiting coding element includes a first area 10, a second area 30 and a third area 50, and the coding pattern is a combination of letters and numbers.

[0103] Embodiment 2

[0104] exist Figure 2 In the specific embodiment shown, the anti-counterfeiting coding element includes a first area 10, a second area 30 and a third area 50, and the coding pattern is a two-dimensional code.

[0105] Embodiment 3

[0106] exist Figure 3 In the specific embodiment shown, the first region 10, the second region 30 and the third region 50 all have an undulating structure layer 60, and the first functional layer 20 in the first region 10 and the second functional layer 70 in the third region 50 are the same layer. For the convenience of description, the first functional layer 20 and the second functional layer 70 are collectively referred to as functional layers. First, the first region 10, the second region 30 and the third region 50 are divided on the substrate 100.

[0107] Step d1: forming a relief structure layer 60 on the substrate 100 , wherein the hollowing index of the relief structure layer 60 in the third region 50 is smaller than the hollowing index of the relief structure layer 60 in the second region 30 ;

[0108] Step d2: forming a functional layer on the undulating structure layer 60;

[0109] Step d3: forming a protective layer 80 on the functional layer, wherein the thickness of the protective layer 80 in the first region 10 is greater than the thickness of the protective layer 80 in the second region 30 and the third region 50;

[0110] Step d4: placing the structure in an atmosphere capable of reacting with the functional layer until the functional layer in the second region 30 is partially or completely removed;

[0111] Step d5: adding a transparent layer 90, wherein the transparent layer 90 is a transparent film or a transparent coating;

[0112] Step d6: Transferring to another substrate 100 .

[0113] Among them, the protective layer 80 can be made once or twice. When the protective layer 80 is made twice, a protective layer 80 with uniform thickness is first formed on all areas, and then an additional protective layer 80 is formed on the first area 10. It is also possible to first form an additional layer on the first area 10, and then form the protective layer 80 on all areas. The advantage of making it once is that there are fewer processes, and the advantage of making it twice is that the advantages of different technologies can be brought into play. For example, the protective layer 80 can be formed on all areas by printing and coating, which takes advantage of high coating efficiency. The additional coating on the first area 10 can use digital printing technology such as inkjet, which takes advantage of the customizability of digital printing.

[0114] The thickness of the protective layer 80 in the first area 10 is greater than that in other areas, which may cause printing alignment problems during implementation, making it difficult to accurately align the position of the first area 10 with the microstructure on the undulating structure layer 60 .

[0115] The hollowing index of the undulating structure layer 60 in the first region 10 is smaller than the hollowing index of the undulating structure layer 60 in the second region 30. Since the hollowing index of the second region 30 is larger, the functional layer on the second region 30 can be removed.

[0116] The third region 50 retains the functional layer due to the hollowing index of the undulating structure layer 60 , and the position of the third region 50 is precisely aligned with the microstructure on the undulating structure layer 60 .

[0117] Since the undulating structures of the first region 10 and the third region 50 are copied from the same original plate, the undulating structures of the first region 10 and the third region 50 have a precise positional correlation. Therefore, in this embodiment, the appearance of the first region 10 that varies with the observation angle is correlated with the appearance of the third region 50 that varies with the observation angle, and these correlations include the relative positions of the patterns, relative brightness relationships, etc.

[0118] Embodiment 4

[0119] The difference from the third embodiment is that some steps of the manufacturing method are different.

[0120] exist Figure 4In the specific embodiment shown, since the same original plate and functional layer manufacturing method are used, after the functional layer is formed in step d2, the semi-finished products of different anti-counterfeiting coding elements are the same.

[0121] Step d3: When forming the protective layer 80, the protective layer 80 in the first area 10 is thicker. The first areas 10 of different anti-counterfeiting coding elements have different shapes. Therefore, after step d3, the thickened area of ​​the protective layer 80 also has different shapes accordingly.

[0122] Step d4: Place the above structure in an atmosphere that can react with the functional layer until part or all of the functional layer located in the second area 30 is removed. Since the first area 10 has a thicker protective layer 80, the functional layer is retained, and different anti-counterfeiting coding elements have first areas 10 of different shapes, and the corresponding shapes of the first functional layer 20 are also different, and the readable elements formed have different coding information. The third area 50 is also retained because the parameters of the microstructure are conducive to the thinner protective layer 80 to play a role, so the shape of the third area 50 is determined by the original plate of the undulating structure, and different anti-counterfeiting coding elements have the same third area 50. The second area 30 is removed by reaction to form a hollow appearance.

[0123] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0124] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0125] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0126] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for manufacturing an anti-counterfeiting coding element, characterized in that: The method for manufacturing the anti-counterfeiting coding element can manufacture a plurality of anti-counterfeiting coding elements, and at least two of the plurality of anti-counterfeiting coding elements have different coding patterns. The substrate (100) has at least one anti-counterfeiting coding element region forming the anti-counterfeiting coding element, and the anti-counterfeiting coding element region has a first region (10), a second region (30) and a third region (50). The difference between the first region (10) and the second region (30) forms a readable coding pattern. The method for manufacturing the anti-counterfeiting coding element comprises: An undulating structure layer (60) having different hollowing indexes is formed in different regions within the anti-counterfeiting code element region of the substrate (100), wherein the hollowing index of the undulating structure layer (60) in the second region (30) is different from the hollowing index of the undulating structure layer (60) in the third region (50); forming a functional layer on a surface of the undulating structure layer (60) that is away from the substrate (100); forming protective layers (80) with different protection indexes in different regions on the surface of the functional layer on a side away from the substrate (100), wherein the protection index of the protective layer (80) in the first region (10) is different from the protection index of the protective layer (80) in the second region (30); The functional layer in the second area (30) of the above structure is removed, and the functional layer located in the first area (10) and the third area (50) is at least partially retained to form an anti-counterfeiting coding element, wherein the difference between the first area (10) and the second area (30) forms a readable coding pattern in the second area (30).

2. The method for making the anti-counterfeiting coding element according to claim 1, characterized in that: The process of forming an undulating structure layer (60) with different hollowing indexes in different regions of the substrate (100) includes: The hollowing index of the undulating structure layer (60) formed in the third region (50) is smaller than the hollowing index of the undulating structure layer (60) formed in the second region (30).

3. The method for making the anti-counterfeiting coding element according to claim 2, characterized in that: The process of removing the functional layer in the second region (30) of the structure includes: The structure having the protective layer (80) is placed in a removal solution to remove the functional layer in the second region (30), wherein the functional layer in the second region (30) having a larger hollowing index is easy to remove.

4. The method for making the anti-counterfeiting coding element according to claim 1, characterized in that: The process of forming protective layers (80) with different protection indexes in different regions on the surface of the functional layer on one side away from the substrate (100) includes: The protection index of the protective layer (80) formed in the first region (10) is greater than the protection index of the protective layer (80) formed in the second region (30).

5. The method for making the anti-counterfeiting coding element according to claim 4, characterized in that: The process of removing the functional layer in the second region (30) of the structure includes: The structure having the protective layer (80) is placed in a removal solution to remove the functional layer in the second region (30), wherein the functional layer in the second region (30) having a smaller protection index is easily removed.

6. The method for making the anti-counterfeiting coding element according to claim 4, characterized in that: The process of forming protective layers (80) with different protection indexes in different regions of the surface of the functional layer away from the substrate (100) comprises the following steps in interchangeable order: forming the protective layer (80) on one side surface of the substrate (100) for the first time; The protective layer (80) is formed for the second time on one side surface of the first region (10).

7. The method for making the anti-counterfeiting coding element according to claim 1, characterized in that: The hollowing index includes at least one of the depth of the undulating structure, the specific volume of the undulating structure, and the aspect ratio of the undulating structure.

8. The method for making the anti-counterfeiting coding element according to claim 1, characterized in that: The functional layer includes at least one of a metal layer, a dielectric layer, an absorption layer, and a magnetic layer.

9. The method for making the anti-counterfeiting coding element according to claim 1, characterized in that: The protection index includes at least one of the thickness of the protective layer (80), the density of the protective layer (80), the alkali resistance of the protective layer (80), the acid resistance of the protective layer (80), and the resistance of the protective layer (80) to organic solvents.

10. The method for manufacturing the anti-counterfeiting coding element according to claim 1, characterized in that: The difference between the first region (10) and the second region (30) includes at least one of a difference in appearance, a difference in light transmittance, and a difference in magnetism.

11. The method for manufacturing the anti-counterfeiting coding element according to claim 1, characterized in that: The coding pattern includes at least one of numbers, letters, barcodes, and QR codes.

12. The method for manufacturing the anti-counterfeiting coding element according to claim 1, characterized in that: The method of forming the protective layer (80) includes at least one of coating, printing, inkjet, laser printing, and numbering machine printing.

13. The method for manufacturing the anti-counterfeiting coding element according to any one of claims 1 to 11, characterized in that: The substrate (100) has a plurality of anti-counterfeiting coding element regions.

14. The method for manufacturing the anti-counterfeiting coding element according to claim 13, characterized in that: Before forming the undulating structure layers (60) with different hollowing indexes in different regions of the substrate (100), the method further includes: The wound substrate (100) is partially spread out to manufacture a plurality of anti-counterfeiting coding elements on the substrate (100).

15. A method for manufacturing an anti-counterfeiting coding element, characterized in that: The method for manufacturing the anti-counterfeiting coding element can manufacture a plurality of anti-counterfeiting coding elements, and at least two of the plurality of anti-counterfeiting coding elements have different coding patterns. The substrate (100) has at least one anti-counterfeiting coding element region forming the anti-counterfeiting coding element, and the anti-counterfeiting coding element region has a first region (10) and a second region (30). The difference between the first region (10) and the second region (30) forms a readable coding pattern. The method for manufacturing the anti-counterfeiting coding element comprises: forming a functional layer on the substrate (100); forming a protective layer (80) on the functional layer, wherein the protective index of the protective layer in the first region (10) and the second region (30) are different; The structure having the protective layer (80) is placed in an atmosphere capable of reacting with the functional layer until the functional layer in the second area (30) is removed, and the functional layer in the first area (10) is at least partially retained, and the difference between the first area (10) and the second area (30) forms a readable coding pattern.

16. The method for manufacturing the anti-counterfeiting coding element according to claim 15, characterized in that: The process of forming the protective layer (80) on the functional layer includes: The protection index of the protective layer (80) formed in the first region (10) is greater than the protection index of the protective layer (80) formed in the second region (30).

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