KR101785467B1 - Dual color-shifting security element and method for producing it, security product comprising it - Google Patents

Dual color-shifting security element and method for producing it, security product comprising it Download PDF

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Publication number
KR101785467B1
KR101785467B1 KR1020160006317A KR20160006317A KR101785467B1 KR 101785467 B1 KR101785467 B1 KR 101785467B1 KR 1020160006317 A KR1020160006317 A KR 1020160006317A KR 20160006317 A KR20160006317 A KR 20160006317A KR 101785467 B1 KR101785467 B1 KR 101785467B1
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South Korea
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layer
dielectric layer
color conversion
security
forming
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KR1020160006317A
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Korean (ko)
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KR20170087090A (en
Inventor
길정하
류진호
김진영
주성현
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한국조폐공사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D2033/10—
    • B42D2033/18—
    • B42D2033/30—
    • B42D2033/40—
    • B42D2035/24—

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

The present invention relates to color conversion security elements. The color conversion security element of the present invention is a color conversion security element that is formed on one side of an absorbing layer, a dielectric layer formed on one side of an absorbing layer having a different thickness, a reflecting layer formed on one side of the dielectric layer except for a part of the upper end of the multi- . Thus, a color conversion effect in which the color of the multi-stage changes according to the viewing angle can be obtained. In addition, it is possible to obtain a multi-color conversion effect in which the colors of the respective stages are different from each other even in one viewing angle, thereby preventing forgery and falsification.

Description

TECHNICAL FIELD [0001] The present invention relates to a color conversion security element, a manufacturing method thereof, and a security product including a color conversion security element,

The present invention relates to a security product comprising a color conversion security element and a color conversion security element that exhibit different colors according to viewing angles.

Color-Shifting A security element is an element whose color changes according to the viewing angle of an observer, and can visually identify the authenticity without using a separate authenticity identification device. At this time, the color conversion security element is a representative example such as color-shifting, hologram, and color-shifting ink.

Since the color conversion effect can not be reproduced by simply scanning and copying, it is very effective in preventing counterfeiting. However, counterfeiting cases using similar films in recent years have occurred, and it is difficult to cope with high counterfeiting by a simple color conversion effect. Various security technologies have been proposed to cope with a high degree of counterfeiting.

Such security techniques include a technique of enhancing security characteristics by combining a thin film interference layer and a diffraction pattern, a technique of disposing metal layers having different hues to produce different hues, and the like, There is a disadvantage in that the cost is increased or the color conversion effect is insufficient.

In order to maximize the visual change, there is a demand for a color conversion security technology that can enhance the color conversion effect and improve the anti-fake effect.

1. Korean Patent Publication No. 2004-0074073 (Aug. 21, 2004)

The present invention relates to a color conversion security element, a color conversion security element manufacturing method, and a color conversion security element, which can improve various color effects and visibility by having a multi-stage dielectric layer having different thicknesses and a reflective layer having a part of a top dielectric layer exposed. We want to provide security products.

According to an aspect of the present invention, there is provided a color conversion security element including an absorption layer, a dielectric layer formed on one side of the absorption layer in a multi-layered structure having different thicknesses, a dielectric layer excluding a part of the upper end of the multi- A reflective layer formed on one side, and a substrate formed on the other side of the absorbing layer or one side of the reflective layer.

The multi-stages may have different thicknesses from 150 nm to 1000 nm, and the multi-stage material may be composed of a composition having the same refractive index or a composition having a different refractive index, and may exhibit different colors depending on the viewing angle.

The partial region may be a boundary region from an edge of the upper end of the multi-stage to a position spaced from the edge of the upper edge by a predetermined dimension.

Further, it may further include an additional security layer formed on the other side of the substrate.

In addition, the additional security layer may be at least one of a fluorescent characteristic layer, a magnetic characteristic layer, and an infrared characteristic layer.

According to another aspect of the present invention, there is provided a color conversion security element comprising: an absorption layer; a dielectric layer formed on one side of the absorption layer, the dielectric layer having at least one convex portion and a concave portion; A reflective layer formed on one side, and a substrate formed on the other side of the absorbing layer or one side of the reflective layer.

Meanwhile, a security product according to an exemplary embodiment of the present invention includes a color conversion security element according to the embodiments of the present invention, and the color conversion security element can be attached or inserted on one side.

Meanwhile, a method of fabricating a color conversion security element according to an exemplary embodiment of the present invention includes forming an absorbing layer on one side of a substrate, forming a multi-layered dielectric layer having different thicknesses on the absorbing layer, Forming a reflective layer on the dielectric layer of the upper dielectric layer, and removing the edge of the upper reflective layer formed on the upper dielectric layer of the dielectric layer by a predetermined dimension.

The step of forming the dielectric layer may include the steps of forming a first dielectric layer on the absorber layer, forming a masking on a specific region of the first dielectric layer, and forming a second dielectric layer on the first dielectric layer on which the masking is formed. Forming a dielectric layer and removing the masking to form a multi-layered dielectric layer having different thicknesses.

The step of removing the edge of the upper reflective layer by a predetermined dimension may include the steps of applying protective lacquer to all the upper portions of the reflective layer except the boundary region of the upper reflective layer formed on the upper portion of the upper dielectric layer in the multi- Sulfuric acid solution to remove the boundary region of the upper reflective layer to which the protective locker is not applied.

The multi-stages may have different thicknesses from 150 nm to 1000 nm, and the multi-stage material may be composed of a composition having the same refractive index or a composition having a different refractive index, and may exhibit different colors depending on the viewing angle.

The method may further include forming an additional security layer on the other side of the substrate.

In addition, the additional security layer may be at least one of a fluorescent characteristic layer, a magnetic characteristic layer, and an infrared characteristic layer.

Meanwhile, a method of fabricating a color conversion security element according to another embodiment of the present invention includes the steps of forming a reflective layer on one side of a substrate, removing a part of the reflective layer, A step of forming a multi-layered dielectric layer having a predetermined thickness and a step of forming an absorbing layer on the multi-layered dielectric layer, wherein a boundary region of the uppermost dielectric layer in the multi- Can be stacked.

As described above, according to the present invention, the color conversion security element and the security product including the color conversion security element have a multi-layered dielectric layer structure having different thicknesses, so that various color effects can be obtained according to the viewing angle. In addition, it is possible to obtain a multi-color conversion effect in which the colors of the respective stages are different from each other even in one viewing angle, thereby preventing forgery and falsification.

In addition, the color conversion security element and the security product including the color conversion security element of the present invention have a structure of a reflective layer in which a part of the upper dielectric layer is exposed, thereby improving the visibility.

In addition, the color conversion security element and the security product including the color conversion security element can improve the security characteristic by forming the additional security layer.

1 is a diagram illustrating a security product according to an embodiment of the present invention.
2 is a cross-sectional view of a color conversion security element according to an embodiment of the present invention.
3 is a diagram for explaining a color conversion effect of the color conversion security element of FIG.
4 is a cross-sectional view of a color conversion security element according to another embodiment of the present invention.
5 is a cross-sectional view of a color conversion security element according to another embodiment of the present invention.
6A to 6I are cross-sectional views illustrating a manufacturing process of the color conversion security element of FIG.
7A to 7G are cross-sectional views illustrating a manufacturing process of the color conversion security element of FIG.
Fig. 8 is an enlarged plan view taken along the direction B in Fig.
9 is a flowchart illustrating a method of manufacturing a color conversion security element according to an exemplary embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, color conversion security elements 1000, 2000 and 3000 according to a preferred embodiment of the present invention and a security product 50 including the same will be described with reference to FIGS. 1 to 9. In the following description, for the sake of clarity of the present invention, a description of what has been conventionally known will be omitted or simplified.

1 is a diagram illustrating a security product according to an embodiment of the present invention. Figures 2, 4 and 5 are cross-sectional views of a color conversion security element according to an embodiment of the present invention.

The security product 50 according to an exemplary embodiment of the present invention may be a secure security product such as a banknote, a passport, and an ID card attached or inserted using the color conversion security element 1000, 2000, have. The color conversion security elements 1000, 2000, and 3000 may be attached or inserted into the security product 50 to prevent forgery and falsification of the security product 50. The color conversion security elements 1000, 2000 and 3000 may be color conversion lines, holograms, have.

Referring to FIG. 1, when the security product 50 is a banknote, the color conversion security elements 1000 and 2000 may be inserted and adhered to one area of the security product 50. 2 and 6 are cross-sectional views taken along the line A-A of the color conversion security elements 1000 and 2000 according to each embodiment.

2 and 4, the color conversion security element 1000 according to an exemplary embodiment of the present invention may include a substrate 100, an absorbing layer 200, a dielectric layer 300, and a reflective layer 400. 2 and 4, a dielectric layer 300 is formed on one side of the absorber layer 200, and a substrate 100 is laminated on one side or another side of a multilayer having a reflective layer 400 formed on one side of the dielectric layer 300 . That is, the color conversion security element 1000 according to the embodiment of FIG. 2 has a structure in which the substrate 100, the absorption layer 200, the dielectric layer 300, and the reflection layer 400 are stacked in this order, The color conversion security element 3000 may have a structure in which the substrate 100, the reflection layer 400, the dielectric layer 300, and the absorption layer 200 are stacked in this order.

Herein, the base material 100 serves as a support for supporting the color conversion security element 1000 as a whole, and its material and thickness are not particularly limited. However, the base material 100 may be applied to a silver wire having a total thickness of about 40 탆 It may be a transparent synthetic resin such as polyethylene terephthalate (PET), polyester, polypropylene, or polycarbonate based on a thickness of about 10 to 30 μm.

The absorber layer 200 is formed on the upper side of the substrate 100 and is formed of a metal layer having a transmittance of 30% to 60%, preferably about 5 nm of chromium (Cr), nickel (Ni), palladium (Pd) And may be a thin film including a material made of any one of or a combination of titanium (Ti), cobalt (Co), iron (Fe), tungsten (W), molybdenum (Mo), iron oxide or carbon (C).

The dielectric layer 300 may be formed on the upper portion of the absorbing layer 200 in a multistage form having different thicknesses. At this time, the thickness of each of the multi-stages 20 and 30 of the dielectric layer 300 may be determined according to a desired color of 150 nm to 1000 nm. Here, the dielectric layer 300 is silicon oxide (SiO 2), aluminum oxide (Al 2 O 3), magnesium fluoride (MgF), aluminum fluoride (AlF 3), barium fluoride (BaF 2), calcium fluoride (CaF 2), or Lithium fluoride (LiF), or a combination thereof. Here, the multi-tier dielectric layer 300 may be formed to have a single refractive index, or multi-tier dielectric layers may be formed of materials having different refractive indexes. The multiple layers of the dielectric layer 300 are formed as continuous thin film layers between the absorbing layer 200 and the reflective layer 400, and are converted into colors separated from each other according to the viewing angle, thereby visually confirming patterns of text, images, figures and the like.

The reflective layer 400 may be formed on the dielectric layer 300 having a multi-layer structure. At this time, the uppermost reflective layer 410 formed at the upper end of the convex portion 20 having the thickest thickness among the multi-stages may be formed such that the upper convex portion 20 is exposed by removing the boundary region by a predetermined value . As a result, the hue of the convex portion 20 is remarkably expressed as shown in Fig.

For example, as shown in FIG. 2, in the case of the dielectric layer 300 formed in two stages, a second dielectric layer 320 having a second thickness is stacked on the first dielectric layer 310 having a first thickness, So that the multi-stepped dielectric layer 300 having the convex portion 20 and the concave portion 30 can be formed. The thickness d1 of the convex portion 20 is the sum of the first thickness d2 of the first dielectric layer 310 and the second thickness d3 of the second dielectric layer 320, The thickness d2 of the first dielectric layer 310 and the thickness d3 of the first dielectric layer 310 may be determined according to the formation of the second dielectric layer 320 after the masking process.

At this time, the hues of the convex portion 20 and the concave portion 30 can be changed according to the viewing angle. On the other hand, when the color conversion security element 1000 is viewed vertically, the convex portion 20 exhibits a hue corresponding to the first thickness d1, and the concave portion 30 exhibits hues corresponding to the second thickness d2 .

Referring to Figure 3 an example, the substrate 100 is PET 12㎛, absorbent layer 200 is chromium (Cr), 5nm, a first dielectric layer 310 is SiO 2 250nm, a masking process when the water-soluble ink 1㎛ coating, the second The color conversion security element 1000 having the dielectric layer 320 of SiO 2 of 140 nm, the reflection layer 400 of aluminum (Al) of 20 nm and the boundary region eliminator setting value of the upper reflection layer 420 of 2 mm is observed according to the viewing angle, A conversion effect can be obtained.

That is, when the color conversion security element 1000 is viewed vertically, the convex portion 20 appears yellow (Y), and the concave portion 30 forming the security pattern appears purple (P). The convex portion 20 is converted into cyan (G) and the concave portion 30 forming the security pattern is converted into yellow (Y) when observed at an angle of 60 degrees or more.

FIG. 5 has a structure including the additional security layer 500 in the structure of the color conversion security element of FIG. 7G, a structure including the additional security layer 500 on the other side of the base 100 of the color conversion security element of FIG. 4, that is, a side of the base 100 on which the reflective layer 400 is not formed, . Here, the additional security layer 500 may be at least one of a fluorescent characteristic layer, a magnetic characteristic layer, and an infrared characteristic layer. The additional security layer 500 can further improve the effect of preventing forgery and falsification.

Here, the color conversion security elements 1000, 2000, and 3000 of FIG. 2 and FIG. 5 illustrate the dielectric layer 300 formed in two stages, but the multiple stages of the dielectric layer 300 may be formed in at least two stages .

As a result, the color conversion security elements 1000, 2000, and 3000 of the present invention can obtain a color conversion effect in which the colors change in multiple stages according to the viewing angle. In addition, a multi-color conversion effect in which the colors of the respective stages are different from each other even in one viewing angle can be obtained. In addition, a security effect by the additional security layer 500 can be obtained. Thus, forgery and falsification can be prevented.

Meanwhile, the color conversion security elements 1000, 2000, and 3000 according to the exemplary embodiment of the present invention may include a multi-layered dielectric layer 300 and a reflective layer 400 having a boundary region removed by using various methods such as film, ink, and hologram ) Can be formed.

Here, to explain the structure formation of the color conversion security elements 1000 and 2000 of the present invention, the manufacturing process of the color conversion security elements according to FIGS. 6A to 6I will be described as one embodiment. 6A to 6I are cross-sectional views illustrating a manufacturing process of the color conversion security element of FIG. Fig. 8 is an enlarged plan view taken along the direction B in Fig. 9 is a flowchart illustrating a method of manufacturing a color conversion security element according to an exemplary embodiment of the present invention. On the other hand, the structure of the color conversion security element of Fig. 4 can be manufactured as shown in Figs. 7A to 7F. 6A to 6I and 7A to 7G show only differences in the stacking order of the respective layers, and the thickness and the forming method of each layer can be applied equally.

As shown in FIG. 6A, the absorption layer 200 may be formed on the substrate 100 by vacuum deposition to form a laminate (S510). At this time, the base material 100 may be 12 占 퐉 in PET.

Next, as shown in FIG. 6B, a first dielectric layer 310 having a specific thickness may be formed on the absorber layer 200 by a vacuum deposition method to form a laminate (S520). At this time, the first dielectric layer 310 may be 250 nm of SiO2.

Next, as shown in FIG. 6C, the water-soluble ink 10 may be applied to a certain area according to a specific security pattern to be formed on the first dielectric layer 310 (S530), and may be masked with a specific security pattern (S540) . At this time, the water-soluble ink can be coated to 1 mu m.

Next, as shown in FIG. 6D, the second dielectric layer 320 may be formed on the upper region coated with the water-soluble ink and the upper region of the exposed first dielectric layer 310 by a vacuum deposition method (S550). At this time, the second dielectric layer 320 may be 140 nm SiO 2.

Next, the water-soluble ink is removed (S560), and a multi-layered dielectric layer 300 having the convex portion 20 and the concave portion 30 can be formed (S570).

Next, the water-soluble ink is removed (S560) to obtain the structure shown in Fig. 6E. Next, as shown in FIG. 6F, the reflective layer 400 may be formed on the dielectric layer 300 by vacuum deposition (S580). At this time, the reflective layer 400 may be 20 nm of aluminum (Al).

6G, in the upper portion of the reflective layer 400 except for a part of the boundary region of the upper reflective layer 420 formed on the upper dielectric layer, that is, the upper portion of the convex portion 20 in the multi-layered dielectric layer 300, (S590). Then, a portion of the edge of the upper reflective layer 410 to which the protective lacquer 40 is not applied is removed (S600) by dipping in the sulfuric acid solution to obtain the structure shown in FIG. 6H. 6I, an additional security layer 500 may be further formed on the other side of the base material 100. FIG.

The color conversion security elements 1000 and 2000 formed in this manner cause different color conversion characteristics in the reflective layer 410 and the reflective layer 420 as shown in FIG. 8, and the boundary region, that is, the region 320 in which the dielectric layer is exposed, , It is possible to easily recognize the more obvious difference, and the visibility can be improved.

It will be apparent to those skilled in the relevant art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. The appended claims are to be considered as falling within the scope of the following claims.

1000,2000: Color Conversion Security Element 50: Security Products
100: substrate 200: absorbing layer
300: dielectric layer 310: first dielectric layer
320: second dielectric layer 400: reflective layer
500: additional security layer 10: water-soluble ink
20, 30: multi-stage (convex portion, concave portion) 40: protective locker

Claims (12)

An absorbing layer;
A dielectric layer formed on one side of the absorber layer and having at least one convex portion and a concave portion in a multistage form having different thicknesses;
A reflective layer formed on one side of the dielectric layer and having a boundary region that is removed from an edge of the convex portion by a predetermined dimension to expose the convex portion; And
A substrate formed on the other side of the absorber layer or on one side of the reflective layer; , ≪ / RTI &
Wherein the boundary region exposes the convex portion at an upper end of the convex portion to improve visibility by a distinct color difference between the convex portion and the concave portion. The method according to claim 1,
Wherein the multi-tier has a different thickness between 150 nm and 1000 nm, and the material constituting the multi-tier comprises a constituent having the same refractive index or a constituent having a different refractive index, Element. delete The method according to claim 1,
And an additional security layer formed on the other side of the substrate,
Wherein the additional security layer is at least one of a fluorescent characteristic layer, a magnetic characteristic layer, and an infrared characteristic layer. delete A security product comprising a color conversion security element according to any one of claims 1 to 4,
Wherein the color conversion security element is attached or inserted on one side of the color conversion security element. A manufacturing method for manufacturing the security element of claim 1
Forming an absorbing layer on one side of the substrate;
Forming a multi-layered dielectric layer having different thicknesses on the absorber layer;
Forming a reflective layer on the multi-layered dielectric layer; And
And removing the boundary region of the upper reflection layer formed on the upper portion of the upper dielectric layer of the dielectric layer by a predetermined dimension. 8. The method of claim 7,
Wherein forming the dielectric layer comprises:
Forming a first dielectric layer on the absorber layer;
Forming a masking in a specific region on the first dielectric layer; And
And forming a second dielectric layer on top of the first dielectric layer having the masking formed thereon to form a multi-layered dielectric layer having different thicknesses. 8. The method of claim 7,
Wherein the step of removing the edge of the upper reflective layer by a predetermined dimension comprises:
Applying a protective locker to all the upper portions of the reflective layer except a part of the boundary region of the upper reflective layer formed on the upper portion of the upper dielectric layer in the multi-layered dielectric layer; And
Sulfuric acid solution to remove a portion of the boundary region of the upper reflective layer to which the protective locker is not applied. delete 8. The method of claim 7,
Wherein the multi-tier has a different thickness between 150 nm and 1000 nm, and the material constituting the multi-tier comprises a constituent having the same refractive index or a constituent having a different refractive index, ≪ / RTI > 8. The method of claim 7,
Further comprising forming an additional security layer on the other side of the substrate,
Wherein the additional security layer is at least one of a fluorescent characteristic layer, a magnetic characteristic layer, and an infrared characteristic layer.
KR1020160006317A 2016-01-19 2016-01-19 Dual color-shifting security element and method for producing it, security product comprising it KR101785467B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102333137B1 (en) 2021-06-08 2021-12-01 박정훈 Multi Printing structure and printing sheet having the same structure

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Publication number Priority date Publication date Assignee Title
JP4406033B2 (en) * 1995-03-20 2010-01-27 スリーエム イノベイティブ プロパティズ カンパニー Interference color filter
JP2011123722A (en) * 2009-12-11 2011-06-23 Toppan Printing Co Ltd Security thread, security paper sheet and verification method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4406033B2 (en) * 1995-03-20 2010-01-27 スリーエム イノベイティブ プロパティズ カンパニー Interference color filter
JP2011123722A (en) * 2009-12-11 2011-06-23 Toppan Printing Co Ltd Security thread, security paper sheet and verification method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102333137B1 (en) 2021-06-08 2021-12-01 박정훈 Multi Printing structure and printing sheet having the same structure

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