Multilayer structure feature information carrier, its preparation method and application

Abstract

This invention discloses a feature information carrier with a multi-layered structure, its preparation method, and its applications. The feature information carrier includes an optical feature layer on the surface and a chemical feature layer on the inner layer. The optical feature layer has a periodic micro / nano structure capable of generating structural colors. The chemical feature layer has a regionalized distribution of metal elements, so that the types and / or contents of metal elements differ in different parts of the feature information carrier. The feature information carrier provided by this invention has visible structural colors, providing a first layer of anti-counterfeiting functionality. By setting structural color areas with different patterns, a second layer of anti-counterfeiting functionality is provided. By making the distribution of metal elements different in different parts of the feature information carrier, a third layer of anti-counterfeiting functionality can be achieved. The metal element distribution pattern and the fine pattern structure are difficult to reverse engineer, greatly increasing the difficulty of counterfeiting and significantly enhancing the anti-counterfeiting capability.

Description

Technical Field

[0001] This invention relates to the field of anti-counterfeiting carrier technology, and in particular to a feature information carrier with a multi-layer structure, its preparation method and application. Background Technology

[0002] Anti-counterfeiting carriers, also known as anti-counterfeiting labels, refer to carriers that can be affixed, printed, or transferred to the surface of a product, its packaging, or its accessories (such as product tags, business cards, and anti-counterfeiting certificates) to serve an anti-counterfeiting function. Currently, the main anti-counterfeiting label technologies used include watermarks, holograms, tamper-evident packaging, and radio frequency identification (RFID) tags. Some anti-counterfeiting carriers also use special inks that alter the pattern's appearance when exposed to heat, light, or other stimuli. However, generally speaking, these technologies are conventional and easily counterfeited.

[0003] For example, in the field of metal-based components, commonly used anti-counterfeiting methods include laser engraving, affixing anti-counterfeiting codes, and traceability codes, which have a certain degree of traceability and counterfeiting effectiveness. However, the characteristic information carried by these carriers is technically easy for others to copy, especially in high-value-added manufacturing fields such as precision instruments and equipment and automobile manufacturing. Others may incur high costs to copy or decode anti-counterfeiting technologies. Therefore, improving anti-counterfeiting measures can provide better technical protection for the interests of consumers and suppliers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a layered feature information carrier, which can be fixedly arranged on the surface of parts and other products, thereby enabling the product to carry feature information and distinguish it from other products without feature information. Specifically, this invention provides a feature information carrier with a multi-layered structure, its preparation method, and its application.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this invention includes:

[0006] In a first aspect, the present invention provides a feature information carrier, the feature information carrier being sheet-like, comprising an optical feature layer and a chemical feature layer stacked together, the optical feature layer being located on the outermost layer, and the chemical feature layer being located on the inner layer covered and protected by the optical feature layer;

[0007] The surface of the optical feature layer is provided with periodic micro-nano structures, which are used to generate structural colors;

[0008] The chemical feature layer has a regionalized distribution of metal elements, so that the different parts of the feature information carrier contain different types and / or contents of metal elements.

[0009] The feature information carrier provided by the present invention carries at least two aspects of feature information: optical feature information and chemical feature information.

[0010] Based on the above technical solution, the feature information carrier is composed of at least two stacked metal layers. The outermost metal layer, which is in contact with air, carries a periodic micro-nano structure that can produce structural color under natural light and / or near-white light. The outermost layer carries at least optical feature information and is referred to as an optical feature layer. Specifically, the second layer can be optionally configured as a single layer or multiple layers, wherein each layer can be optionally divided into a single region or multiple regions. When one layer is divided into two or more regions, at least two different regions contain different types and / or contents of metal elements, thereby carrying chemical feature information and is referred to as a chemical feature layer.

[0011] Furthermore, in a direction parallel to the surface of the optical feature layer, the overall shape of the periodic micro / nano structure includes any one or more combinations of text, numbers, and graphics to produce patterned structural colors.

[0012] Furthermore, the optical feature layer is made of an oxidation-resistant metal material, specifically selected from gold, silver, and platinum, or a combination of two or more of these materials.

[0013] Furthermore, the material of the chemical feature layer is selected from one or more combinations of gold, silver, tin, copper, platinum, magnesium, zinc, gold alloys, silver alloys, tin alloys, copper alloys, platinum alloys, magnesium alloys, and zinc alloys.

[0014] Furthermore, the total thickness of the optical feature layer and the chemical feature layer ranges from 1 μm to 1000 μm, the thickness of the optical feature layer ranges from 0.5 to 5 μm, and the total thickness of the chemical feature layer ranges from 0.5 to 995 μm.

[0015] Furthermore, when the chemical feature layer is set to two or more layers, each layer has at least one different feature, which includes one or more of the following: the type of metal element contained, the content of the metal element, the pattern it has, and the layer thickness.

[0016] Furthermore, the feature information carrier also includes a fixing material layer, which is bonded to the side of the chemical feature layer away from the optical feature layer, for fixing the feature information carrier to the surface of the substrate; the chemical feature layer is completely covered by the optical feature layer, and the optical feature layer and the chemical feature layer are integrally stacked together.

[0017] Secondly, the present invention also provides a method for preparing the above-mentioned feature information carrier, which includes the following steps:

[0018] The step of forming an optical feature layer, wherein the surface of the optical feature layer is provided with periodic micro-nano structures, the periodic micro-nano structures being used to generate structural colors; the step of forming a chemical feature layer, wherein the chemical feature layer can be selectively configured as a single layer or multiple layers, each layer can be selectively divided into a single region or multiple regions, and when one layer is divided into two or more regions, the different regions contain different types and / or contents of metal elements.

[0019] Optionally, it may include the step of integrally stacking the optical feature layer and the chemical feature layer.

[0020] Furthermore, a method for preparing a feature information carrier specifically includes:

[0021] A diamond template is provided, wherein the surface of the diamond template is provided with the periodic micro / nano structure template structure;

[0022] An oxidation-resistant metal is deposited on the surface of the diamond template to form the optical feature layer, wherein the periodic micro / nano structure and the template structure are mutually concave and convex structures;

[0023] A patterned metal deposition layer is formed on the surface of the optical feature layer to create the chemical feature layer.

[0024] Additionally, a fixing material layer may be deposited on the surface of the chemically characterized layer.

[0025] Furthermore, the metal deposition method used is selected from any one or a combination of two or more of the following: thermal evaporation, magnetron sputtering, electron beam evaporation, electroplating, and electroless plating.

[0026] Furthermore, the diamond may be selected from any one of the following shapes: block, sheet, and film.

[0027] As one application of the present invention, the feature information carrier provided by the present invention is fixed on the surface of an automotive part article, thereby providing an automotive part article in another aspect of the present invention, wherein the above-mentioned feature information carrier is fixedly arranged on its surface.

[0028] Based on the above technical solution, compared with the prior art, the beneficial effects of the present invention include at least the following:

[0029] The optical feature layer of the feature information carrier provided by this invention has a conspicuous structural color, providing a first layer of anti-counterfeiting function; the surface of this structural color can be set with structural color areas of different patterns according to needs, and different periodic micro-nano structures are set in different areas, providing a second layer of anti-counterfeiting function; the chemical feature layer sets metal-containing layers with different metal element compositions, thicknesses, and pattern area distributions in different areas, so that different areas present different metal element composition distributions. Finally, the metal content in the composite coating can be measured by tools such as energy dispersive spectroscopy analysis equipment and metal composition analyzers. According to the feature position string calibrated by different coordinates, the specific metal composition content is measured at different feature positions, thereby realizing a third layer of anti-counterfeiting function.

[0030] The feature information carrier provided by this invention has a structural color or patterned surface in the optical feature layer, which can be observed with the naked eye to obtain optical feature information. The chemical composition information of the chemical feature layer is obtained through detection equipment. The two anti-counterfeiting functions are superimposed and verified, thereby meeting the anti-counterfeiting requirements that are difficult to crack and imitate.

[0031] The feature information carrier provided by the present invention is composed of a metal-based material. The metal-based material is easy to form a film, has good toughness, and the layers can easily permeate each other and bond firmly, making the sheet structure of the feature information carrier itself stable and tough.

[0032] The method for preparing the feature information carrier provided by this invention uses diamond as a template. Firstly, based on diamond's extremely strong chemical stability, it will not react with metals such as gold, silver, or platinum even at high temperatures under vacuum coating environments such as magnetron sputtering and thermal evaporation. This ensures that there is only physical contact between the optical information layer of the feature information carrier and the diamond, without chemical bonding. Therefore, when the feature information carrier is firmly placed on the substrate surface through welding and bonding, its bonding strength with the substrate is higher than its physical contact bonding strength with the diamond, allowing the diamond template to be easily removed. Secondly, diamond has a lower coefficient of thermal expansion than metals such as gold, silver, and platinum. When the feature information carrier preparation process is carried out under high-temperature conditions, after cooling, due to the difference in thermal expansion, a gap naturally exists between the feature information carrier and the diamond, making demolding easier.

[0033] In addition, the feature information anti-counterfeiting identification method provided by the present invention is relatively easy to implement. It can verify authenticity by optical detection of surface structural color and detection of metal content in different locations, but it is difficult to counterfeit. It is an ideal anti-counterfeiting technology.

[0034] The above description is merely an overview of the technical solution of the present invention. In order to enable those skilled in the art to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described below in conjunction with detailed drawings. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the multi-layer structure of the feature information carrier provided in a typical embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram illustrating the preparation process of a feature information carrier provided in a typical embodiment of the present invention. Detailed Implementation

[0037] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The following will further explain and illustrate the technical solution, its implementation process, and its principles.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0039] This invention provides a feature information carrier that carries at least two aspects of feature information: optical feature information and chemical feature information.

[0040] The chemical feature layer is a metal inner layer covered and protected by the optical feature layer. There is at least one layer, and each layer is divided into at least one region. When there are two or more regions, the types and / or contents of metal elements contained in different regions may be different, thus carrying chemical feature information.

[0041] The metal material of the optical feature layer is an oxidation-resistant metal, selected from one or more of gold, silver, and platinum. Gold, silver, and platinum are chemically stable, do not react chemically with diamond, and protect the feature information carrier from oxidation by air.

[0042] In some implementations, the periodic micro / nano structures are arranged in patterned regions to produce patterned structural colors; the patterned regions include types such as text, numbers, symbols, and graphics.

[0043] Specifically, in some implementations, the surface of the optical feature layer can be divided into multiple patterned areas, which can carry anti-counterfeiting information such as text, numbers, codes, symbols and specific graphics through patterns. In this way, patterned structural colors are formed on the surface as a second layer of anti-counterfeiting.

[0044] The specific periodic micro / nano structures and their implementation methods can refer to existing structural color preparation technologies, which include mechanical processing, laser processing, liquid phase etching, and vapor phase etching.

[0045] The chemical feature layer is the key technological innovation of this invention. The preparation method for at least one metal-based chemical feature layer is selected from thermal evaporation, magnetron sputtering, electron beam evaporation, electroplating, and electroless plating. When each layer is divided into at least one region and the number of regions is two or more, different metal element types and / or contents are achieved in different regions by masking methods, specifically including mechanical masking and photoresist masking.

[0046] Specifically, such as Figure 1 As shown, in some embodiments, the chemical feature layer may include a plurality of patterned metal sublayers stacked along the specified direction, wherein the metal patterns in the patterned metal sublayers are made of elemental metals and / or alloys.

[0047] In some implementations, it is preferable that the multiple patterned metal sublayers have different thicknesses.

[0048] In some implementations, the total thickness of the optical and chemical feature layers ranges from 1 μm to 1000 μm, and the thickness of the optical feature layer ranges from 0.5 to 5 μm. When certain metal composition analyzers have strong penetration detection capabilities, a certain thickness of elemental metal sheet with known composition can be pre-placed on the surface of the feature information carrier as compensation when testing the component content, so as to avoid interference from the composition of the substrate with the chemical information carried by the feature information carrier.

[0049] For ease of use, in some embodiments, the feature information carrier may further include a fixing material layer disposed on the side of the chemical feature layer opposite to the optical feature layer, for fixing the feature information carrier to the surface of the substrate.

[0050] The material of the fixing layer can be selected based on the composition of the substrate, and can be metal solder paste, inorganic adhesive, or organic adhesive; for example, solder paste can be used as a fixing material between the metal substrate and the feature information carrier.

[0051] As some typical application examples of the above technical solutions, the macroscopic shape of the feature information carrier can be designed according to requirements. Specifically, for example, the macroscopic shape of the feature information carrier can be a regular shape, an irregular shape, or a combination of regular and irregular shapes. The microstructure of the feature information carrier includes periodic micro- and nano-grooves, and the grooves form a grating structure, which can appear as a structural color carrier under natural light or near-white light.

[0052] In a very specific preferred example, the surface area of ​​the feature information carrier is greater than 10 mm. 2 Preferably, the area is greater than 20mm. 2The shape of the structural color area can be designed as a regular shape, such as a triangle, rectangle, or circular polygon; or an irregular shape, such as text, numerical codes, symbols, or a combination of regular and irregular shapes.

[0053] The width of the groove stripes in the periodic micro / nano structure ranges from 0.1 to 100 μm, and the spacing between the microgrooves only needs to meet the structural color requirements.

[0054] In some other preferred embodiments, the material of the feature information carrier is a metal-based material, but it also includes the embedding or doping of non-metallic materials, and the non-metallic materials are selected from one or more of carbon, oxygen, sulfur, nitrogen, boron, silicon and phosphorus.

[0055] To prepare the aforementioned feature information carrier, this embodiment of the invention also provides a method for preparing the feature information carrier, which includes the following steps:

[0056] The step of forming an optical feature layer, wherein the periodic micro / nano structure carried by the optical feature layer is capable of generating structural color; the step of forming a chemical feature layer, wherein each layer of the chemical feature layer is divided into at least one region, and when the number of regions is two or more, the types and / or contents of metal elements contained in different regions may be different.

[0057] Optionally, it may include the step of integrally stacking the optical feature layer and the chemical feature layer.

[0058] In practice, the optical feature layer can be formed first, and then a chemical feature layer can be deposited on its surface. Alternatively, the chemical feature layer can be formed first, and then periodic micro / nano structures can be fabricated on its surface to obtain the optical feature layer. Therefore, there are various methods for fabricating feature information carriers with the above-mentioned structural characteristics, and the order of the steps is not limited.

[0059] However, as a preferred preparation method, such as Figure 2 As shown, in some embodiments, the preparation method may specifically include the following steps:

[0060] A diamond template is provided, wherein the surface of the diamond template is provided with periodic micro / nano structures;

[0061] A metal layer is deposited on the surface of the micro / nano template structure. Metal particles are deposited in the micro / nano structure. After continuous film formation, a corresponding micro / nano structure is formed on the film surface, thereby carrying optical feature information to form an optical feature layer.

[0062] On the surface of the optical feature layer, different types and / or contents of elemental metals and / or alloys are patterned and deposited by means of a mask to form the chemical feature layer.

[0063] In some embodiments, the chemical feature layer is a multilayer deposition, with different patterns and / or types and / or contents and / or thicknesses of metal elements between the layers.

[0064] As typical application examples of the above technical solutions, the method for preparing the feature information carrier preferably employs the template method described above. Specifically, when the substrate surface is planar, a planar diamond sheet or block can be used as a template. When the substrate surface is curved or otherwise non-planar, silicon or molybdenum, which conforms to the shape of the substrate surface, can be used as a substrate, and a diamond film can be grown on the substrate surface as a template. Preferably, the diamond film is polycrystalline diamond with a thickness greater than 10 μm.

[0065] Using diamond as a substrate, grooves with periodic micro- and nano-structures are first arranged on the diamond surface. The arrangement method is selected from laser processing, reactive ion etching (RIE), and inductively coupled plasma etching (ICP).

[0066] The method for depositing the first metal layer, i.e. the optical feature layer, in a diamond template can be selected from magnetron sputtering, thermal evaporation, and electron beam deposition. During the deposition process, the temperature range of the diamond template is 0-300℃. The deposited metal material is selected from oxidation-resistant metals such as gold, silver, and platinum. The deposition thickness is 0.5-5μm, and the deposition rate is 10-100nm / min.

[0067] The thickness of the single-layer chemical feature layer ranges from 0.1 to 500 μm. During the feature layer deposition process, a mask can be used to set the pattern of the metal to be deposited; the mask method can be, for example, mechanical masking or photoresist masking. The deposition method is selected from thermal evaporation, magnetron sputtering, electron beam evaporation, electroplating, and electroless plating. The deposition rate is between 10 and 500 nm / min; the deposition temperature is between 0 and 500 °C.

[0068] Of course, the specific substrate material is not limited to diamond. For example, it can also be selected from ceramics such as silicon dioxide, alumina, and silicon carbide, which are not prone to chemical reaction with metals such as gold, silver, and platinum at high temperatures. When diamond is preferred as the substrate material, the diamond can be selected as single-crystal diamond or polycrystalline diamond according to its shape and size. The surface of the substrate is usually ground and polished to a smooth surface with a roughness of less than 0.1 μm before the micro-nano grooves are arranged.

[0069] As a further application of the above-mentioned feature information carrier and its preparation method, this embodiment of the invention also provides a method for detecting the chemical characteristics of the feature information carrier, which includes the following steps:

[0070] Different selected locations in the optical feature layer are used to calibrate the coordinates;

[0071] The elemental composition data at each coordinate position were obtained by using an elemental composition analyzer.

[0072] Establish a database that corresponds coordinate locations to elemental composition contents;

[0073] The elemental composition of a feature information carrier with unknown component content is detected by measuring coordinate values ​​fixed on the surface of the printing substrate. The result is compared with a known database to determine whether the feature information carried by the feature information carrier is the same as or similar to (within the error requirement), thereby identifying whether the printing substrate is genuine.

[0074] It should be noted that the metal content in the optical feature layer is included in the detection process, meaning that the optical feature layer carries at least optical feature information; when the composition and content of the optical feature layer are not fixedly deducted, it also carries chemical feature information.

[0075] In some implementations, the content of the element can be detected using tools such as energy dispersive spectroscopy (EDS) equipment and metal composition analyzers.

[0076] As a more specific application of the above solution, this embodiment of the invention also provides an automotive component, wherein the surface of the automotive component is loaded with the feature information carrier provided by any of the above embodiments.

[0077] The technical solution of the present invention will be further described in detail below through several embodiments and in conjunction with the accompanying drawings. However, the selected embodiments are only for illustrating the present invention and do not limit the scope of the present invention.

[0078] Example 1

[0079] The method for preparing a feature information carrier provided in this embodiment includes the following steps:

[0080] Provide a diamond planar matrix (such as Figure 2 In step 1), the surface roughness is 5 nm. Periodic micro / nano stripe structures are formed on a diamond substrate using inductively coupled plasma etching (ICP-C). The stripe width is approximately 2 μm, and the stripe gap exceeds 1 μm. The surface with the micro / nano structure is used as the template surface (e.g., ...). Figure 2 Step 2 in the process.

[0081] A gold layer was deposited in the template using magnetron sputtering deposition at a rate of 20 nm / min, a deposition temperature of 100 °C, and a deposition thickness of 1 μm, forming an optical feature layer. Figure 1 The first layer shown;

[0082] A chemical feature layer is patterned and deposited on the optical feature layer using a mechanical masking method, as shown in the deposition method below. Figure 1The second layer is a crescent-shaped copper layer, and the third layer is a smiley face-shaped silver (face) and aluminum (mouth and eyes), thus forming a three-layered feature layer. The thickness of each layer is, for example, 2 μm. Different combinations of thicknesses can also be set to form different anti-counterfeiting information, but each layer is no more than 10 μm. The fourth layer is an S-shaped zinc layer deposited using a photoresist mask method, and the deposition method is electroplating, with a thickness of 20 μm.

[0083] A fifth layer of tin-based solder paste is arranged on the chemical feature layer as a fixing material layer; the arrangement method is selected from spin coating, magnetron sputtering, thermal evaporation, electron beam deposition, electroplating and chemical plating.

[0084] Example 2

[0085] The method for preparing a feature information carrier provided in this embodiment includes the following steps:

[0086] A curved molybdenum sheet is provided as a substrate, and a thin-film diamond layer is grown on the molybdenum surface. The diamond layer is 10 μm thick and ground until the surface roughness is less than 0.1 μm. A patterned periodic micro-nano stripe structure is formed on the diamond substrate using laser processing. The stripe width is more than 20 μm and the stripe gap is more than 10 μm.

[0087] A platinum layer was deposited in a template using magnetron sputtering deposition. Platinum particles were deposited within micro / nano structures, and after continuous film deposition, corresponding micro / nano structures formed on the film surface, thereby carrying optical feature information to form an optical feature layer. The deposition rate was 50 nm / min, the deposition temperature was 200℃, and the deposition thickness was 3 μm, forming the optical feature layer, i.e. Figure 2 Step 3 shown in the figure: After depositing the optical feature layer, the platinum layer is polished to remove the uneven structure caused by the periodic micro-nano structure that causes the platinum layer to move away from the diamond surface.

[0088] A chemical feature layer is patterned and deposited on the optical feature layer using a mechanical masking method. One or more different metals selected from gold, silver, tin, copper, platinum, magnesium, zinc, gold alloys, silver alloys, tin alloys, copper alloys, platinum alloys, magnesium alloys, and zinc alloys are deposited sequentially in different patterns, with a thickness ranging from 0.5 to 995 μm. Figure 2 As shown in step 4.

[0089] An inorganic adhesive is spin-coated onto a chemically characterized layer as a fixing material layer. This inorganic adhesive can be used for bonding between metals and between metals and plastics, such as... Figure 2 As shown in step 5.

[0090] Example 3

[0091] This embodiment illustrates an application of a feature information carrier, as shown below:

[0092] The feature information carrier obtained in Example 1 was applied to a metal-based automotive part. A diamond template and the feature information carrier were arranged on the plane of the part, with the fixing material layer in contact with the part. The diamond template and the feature information carrier were heated until the tin-based solder paste melted. After cooling, the diamond template was removed, completing the fixed arrangement of the feature information carrier on the surface of the part. Figure 2 As shown in step 6.

[0093] Example 4

[0094] This embodiment illustrates an application of a feature information carrier, as shown below:

[0095] The feature information carrier obtained in Example 2 was applied to a plastic-based automotive part. A diamond template and the feature information carrier were arranged on the surface of the plastic part, which conformed to its shape. A fixing material layer was in contact with the part. An inorganic adhesive was used to bond the feature information carrier to the part surface. The molybdenum substrate with the diamond template as its surface was then removed, completing the fixed arrangement of the feature information carrier on the part surface. Figure 2 As shown in step 6.

[0096] Example 5

[0097] This embodiment illustrates a method for detecting chemical feature information of a feature information carrier, as detailed below:

[0098] The chemical characteristics of the feature information carrier prepared in Example 1 were detected. First, multiple detection coordinates were calibrated. Then, a portable elemental composition analyzer was used to detect and record the elemental composition content at the coordinate positions, thereby realizing the detection of the metal composition content at the corresponding coordinates. Using this as a database, the elemental composition content at the corresponding coordinates of the feature information carrier carrying unknown chemical characteristics was detected. After comparing the values, it was determined whether the carrier was consistent with the feature information carrier prepared in Example 1, thereby identifying whether the printed product was genuine.

[0099] Based on the above embodiments, it is clear that the optical feature layer of the feature information carrier provided by the embodiments of the present invention has a conspicuous structural color, providing a first layer of anti-counterfeiting function; the surface of the structural color can be set with structural color areas of different patterns according to needs, and different microstructures are set in different areas, providing a second layer of anti-counterfeiting function; the chemical feature layer is set with metal-containing layers of different metal element compositions, thicknesses, and pattern area distributions in different areas, so that the distribution of metal elements that can be measured in different areas is different, and the metal content in the final composite coating can be measured by various metal composition analyzers to obtain the distribution of various metal contents, thereby achieving a third layer of anti-counterfeiting function; furthermore, the chemical feature layer includes sheet-like metal layers of varying thicknesses and patterns, and the distribution of metal elements and fine pattern structures in each internal layer are difficult for third parties to reverse engineer, greatly increasing the difficulty of counterfeiting and significantly enhancing the anti-counterfeiting capability.

[0100] Furthermore, the structural color or patterned surface of the feature information carrier provided in this embodiment of the invention can create a deceptive effect, misleading counterfeiters into believing that only surface anti-counterfeiting features are present, thus ignoring the internal metal distribution structure features. This makes it easier for them to expose counterfeiting behavior, which is more conducive to the verification of counterfeit and substandard products. In addition, the feature information anti-counterfeiting identification method provided in this embodiment of the invention is relatively easy to implement, and can verify authenticity through optical detection of surface structural color and detection of metal element content at different locations. It is time-efficient and facilitates the efficient implementation of anti-counterfeiting work.

[0101] It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for detecting the chemical characteristics of a feature information carrier, characterized in that, include: A feature information carrier with a multi-layered structure is provided. The feature information carrier is sheet-like, including stacked optical feature layers and chemical feature layers. The optical feature layers are located on the outermost layer, and the chemical feature layers are located in the inner layer covered and protected by the optical feature layers. The surface of the optical feature layers is provided with periodic micro-nano structures, which are used to generate structural colors. The chemical feature layers have regionalized distributions of metal elements, so that the different parts of the feature information carrier contain different types and / or contents of metal elements. Different selected locations are used to calibrate the coordinates in the optical feature layer; The elemental composition data at each coordinate position were obtained by using an elemental composition analyzer. Establish a database that corresponds coordinate locations to elemental composition contents; The elemental composition of a feature information carrier with unknown component content is detected by measuring coordinate values ​​fixed on the surface of the printing substrate. The result is compared with a known database to determine whether the feature information carried by the feature information carrier is the same as or less than the error requirement, thereby identifying whether the printing substrate is genuine.

2. The chemical characteristic detection method according to claim 1, characterized in that, The chemical feature layer is configured as a single layer or multiple layers, wherein each layer is divided into a single region or multiple regions, and when one layer is divided into two or more regions, at least two different regions contain different types and / or contents of metal elements.

3. The chemical characteristic detection method according to claim 1, characterized in that, In a direction parallel to the surface of the optical feature layer, the overall shape of the periodic micro / nano structure includes any one or more combinations of text, numbers, and graphics to produce patterned structural colors.

4. The chemical characteristic detection method according to claim 1, characterized in that, The material of the optical feature layer is an oxidation-resistant metal material, which is selected from any one or a combination of two or more of gold, silver, and platinum.

5. The chemical characteristic detection method according to claim 1, characterized in that, The material of the chemical feature layer includes any one or a combination of two or more of the following: gold, silver, tin, copper, platinum, magnesium, zinc, gold alloys, silver alloys, tin alloys, copper alloys, platinum alloys, magnesium alloys, and zinc alloys.

6. The chemical characteristic detection method according to claim 1, characterized in that, The total thickness of the optical feature layer and the chemical feature layer is 1-1000 μm, wherein the thickness of the optical feature layer is 0.5-5 μm and the thickness of the chemical feature layer is 0.5-995 μm.

7. The chemical characteristic detection method according to claim 6, characterized in that, When the chemical feature layer is set to two or more layers, each layer has at least one different feature, which includes one or more of the following: the type of metal element contained, the content of the metal element, the pattern it has, and the layer thickness.

8. The chemical characteristic detection method according to claim 1, characterized in that, It also includes a fixing material layer, which is bonded to the side of the chemical feature layer away from the optical feature layer, for fixing the feature information carrier to the surface of the substrate; The chemical feature layer is completely covered by the optical feature layer, and the optical feature layer and the chemical feature layer are integrally stacked together.

9. The chemical characteristic detection method according to any one of claims 1-8, characterized in that, The method for preparing the feature information carrier includes: The step of forming an optical feature layer, wherein the surface of the optical feature layer is provided with periodic micro / nano structures, the periodic micro / nano structures being used to generate structural colors; The step of forming a chemical feature layer, wherein the chemical feature layer is configured as a single layer or multiple layers, each layer is divided into a single region or multiple regions, and when one layer is divided into two or more regions, the different regions contain different types and / or contents of metal elements. And, including the step of integrally stacking the optical feature layer and the chemical feature layer.

10. The chemical characteristic detection method according to claim 1, characterized in that, The printing substrate includes automotive parts.

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