CN204166810U - Nanometer anti-counterfeit structure - Google Patents

Abstract

The utility model discloses a kind of secondary nanometer anti-false sign.This anti-counterfeiting design at least has periodic convex-concave structure by one and forms, and its convex-concave structure does not have axial symmetry, and the color-changing anti-counterfeit design that these periodic structures produce through optical diffraction is false proof as the first order, is directly differentiated by consumer; This anti-counterfeiting design embeds the nanostructured with stochastic distribution on periodic structure, has that one deck is irreversible becomes opaque color shifting ink layer from transparent above it at least.The beneficial effects of the utility model are: the irreversible color shifting ink of the utility model design becomes opaque when consumer uses product from transparent and forever block first order anti-false sign, stops reusing of anti-fake mark.

Description

Nanometer anti-counterfeit structure

Technical field

The utility model relates to diffraction optics anti-counterfeiting technology, particularly relates to a kind of nanometer anti-counterfeit structure.

Background technology

With modern science and technology, as color photocopying technology, the development of scanning and printing technique, it is more and more that counterfeit product etc. invade crime.These counterfeit products damage the rights and interests of consumer and businessman greatly.Counterfeit for product, the businessman of current famous and precious drinks adopts exquisite bottled and packaging to increase the anti-counterfeit capability of its product.But being packaged in of these finenesses increases while cost, is in fact difficult to the false-proof function reaching simple and fast.These packagings may be reclaimed by lawless person and reuse, and as the holographic optics anti-false sign changed as color, the logical product of these marks is attached on bottle or bottle cap, although consumer can recognize by naked eyes, these marks are not destroyed after open bottle cover.If anti-false sign design is too complicated, ordinary consumer is also made to be beyond recognition the true and false of product.

Summary of the invention

In order to solve the problems of the prior art, the utility model devises a kind of nanometer anti-counterfeit structure, solve a difficult problem of destroying anti-false sign when current ordinary consumer is beyond recognition product false proof mark and is used product, simultaneously for businessman's professional accreditation counterfeit product provides discriminating foundation.

The utility model provides a kind of nanometer anti-counterfeit structure, comprises diffracting layer and encryption layer, and described encryption layer embeds diffracting layer; Described diffracting layer has periodic asymmetric cross section structure, and the difference in height of its structure is between 50 nanometers to 500 nanometers, and the cycle of its structure is between 300 nanometers are to 2 microns; Described encryption layer is groove or outstanding structure.

As further improvement of the utility model, the vertical view of the basic cell structure of the diffracting layer of described nanometer anti-counterfeit structure is square, circle, straight line, have the circular arc of circular symmetry a part or there are 3 solid axles overlooked on direction, 5 solid axles and 6 solid axle symmetry.

As further improvement of the utility model, described anti-counterfeit structure second level cryptographic structure.

As further improvement of the utility model, described second level cryptographic structure is nanostructured, these second level cryptographic structure being embedded in diffracting layer are groove or outstanding structure, and its width or length are in 200 nanometers or following, and the degree of depth or thickness are below 200 nanometers.

As further improvement of the utility model, described second level cryptographic structure is micrometer structure, these second level Sealing mechanisms being embedded in diffracting layer are groove or outstanding structure, and its width or length are between 500 nanometers are to 10 microns, and the degree of depth or thickness are below 50 nanometers.

As further improvement of the utility model, described second level cryptographic structure is the structure with magnetic, optical property.

As further improvement of the utility model, described nanometer anti-counterfeit structure also comprises and has the irreversible optical ink layer from transparent to opaque change of one deck at least.

As further improvement of the utility model, what described nanometer anti-counterfeit structure had layer of transparent at least buries protective seam.

The beneficial effects of the utility model are: the utility model emphasis is that the nano-micrometre processing technology adopting modern microelectronic technical development to get up is prepared cross section not have the optical diffraction layer of axial symmetry false proof as the first order, designs and produce the optic metachromatic security devices that laser holography cannot copy.This anti-false sign is integrated on bottle cap, single use.When product had both been purchased in consumer's use, the optical anti-counterfeiting function of security devices had been destroyed by color shifting ink, avoided product false proof to pack and was re-used by lawless person.Therefore the nanometer security devices that the utility model proposes while meeting consumer's simple and fast identification authenticity of products, can eliminate the possibility that security devices is replicated or is reused.In addition, in first order anti-false sign, introduce second level anti-counterfeit structure, ensure that the utility model provides professional authentication to provide certificate for businessman and associated mechanisms.

[accompanying drawing explanation]

Fig. 1 is the physical principle schematic diagram of the reflective color-change optical security devices of the utility model.

Fig. 2 is the utility model variable color light anti-counterfeiting design.Security devices layer has concavo-convex periodic structure 02 by a plane layer 01 and at least one and forms diffracting layer.The different cycles represented by figure can be adopted to design the pattern of different colours.

Fig. 3 be the utility model form optical anti-counterfeiting design diffracting layer can different dot structure schematic diagram, the pixel of 01 is square, and 02 is round, and 03 is the linear structure with one fixed width.

Fig. 4 pattern 00 is that the utility model adopts square pixel, three parts (01,02 and 03) that different cycles (local amplifies 04,05 and 06) designs, and pattern 01 is the color effects figure of group 00 under certain visual angle, and 11,12 and 13 present different colours.

Fig. 5 is the design proposal of the utility model anti-fake mark.

Fig. 6 pattern 00 is the linear pixel with one fixed width that the utility model adopts Fig. 5 design concept to design.Three parts (01,02 and 03) that different pixels trend (local amplifies 04,05 and 06) designs, pattern 01 is the color effects figure of group 00 under certain visual angle, and 11,12 and 13 present different colours.

Fig. 7 is the embodiment schematic diagram that the utility model utilizes design concept Fig. 5.

Fig. 8 pattern 00 is that the utility model adopts same period on Fig. 7 basis, has the schematic diagram of the optical anti-counterfeiting device of different symmetry Pixel Design.Cycle is identical, three parts (01,02 and 03) that symmetry different pixels (local amplifies 04,05 and 06) designs, and pattern 01 is the color effects figure of group 00 under certain visual angle, and 11,12 and 13 present different colours.

Fig. 9 is the asymmetric smooth anti-counterfeiting design schematic cross-section of the utility model, bottle cap basalis 01 arranges security devices layer, security devices layer is made up of a plane layer and at least one concavo-convex periodic structure layer, security devices layer has one from transparent to opaque irreversible color shifting ink layer at least.

Figure 10 is that the utility model is embedded in second level encryption 02 at first order diffracting layer anti-false sign 01.

Figure 11 is the security devices sectional view of the utility model superencipher, 01 is bottle cap basalis, 02 is color unit layer or first order anti-false sign, does not have a concavo-convex periodic structure of axial symmetry and forms, embed the second time cryptographic structure 04 in periodic structure by a plane layer and at least one.Security devices layer has the optical ink layer 03 of an initial transparent at least.

[embodiment]

To illustrate below in conjunction with accompanying drawing and embodiment further illustrates the utility model.

A kind of secondary nanometer anti-counterfeit structure, comprise diffracting layer and encryption layer, described encryption layer embeds diffracting layer.

Described diffracting layer has periodic asymmetric cross section structure, and the difference in height of its structure is between 50 nanometers to 500 nanometers, and the cycle of its structure is between 300 nanometers are to 2 microns.

The vertical view of the basic structural unit of described secondary nanometer anti-counterfeit structure diffracting layer is square, circle, straight line, have the circular arc of circular symmetry a part or there are 3 solid axles overlooked on direction, 5 solid axles and 6 solid axle symmetry.

Described encryption layer is diffracting layer (first order cryptographic structure) and second level cryptographic structure.

Described second level cryptographic structure is nanostructured, and these second level cryptographic structure being embedded in first order cryptographic structure are groove or outstanding structure, and its width or length are in 200 nanometers or following, and the degree of depth or thickness are below 200 nanometers.

Described second level cryptographic structure is micrometer structure, and these second level Sealing mechanisms being embedded in one-level cryptographic structure are groove or outstanding structure, and its width or length are between 500 nanometers are to 10 microns, and the degree of depth or thickness are below 50 nanometers.

Described second level cryptographic structure is the structure with magnetic, optical property.

Described secondary nanometer anti-counterfeit structure also comprises and has the irreversible optical ink layer from transparent to opaque change of one deck at least.

What described secondary nanometer anti-counterfeit structure had layer of transparent at least buries protective seam

A kind of bottle cap optics anti-false sign, on bottle cap or bottle cap side be provided with an antifake device mark, this visit is indicate that the diffracting layer that is made up of the concaveconvex structure of one-period be first order accidental enciphering result that is false proof, that slip into diffracting layer is that the first order is false proof, this anti-false sign is through template impression or copies on metal foil, or on the material of opaque high reverse--bias, or grow up on an opaque material.

Check in 10 degree to 80 degree visual angles, the color gamut that above-mentioned security devices layer presents is from purple to redness.

The cross section structure of the pixel of described security devices has axial symmetry or the axle without any symmetry, and the difference in height of structure is between 50 nanometers to 500 nanometers.

The vertical view of basic structure (or being the pixel)/concaveconvex structure of described false proof diffracting layer is square, circle, straight line, have the circular arc of circular symmetry a part or there are triple, the five heavy and symmetric structures of hexagonal axis overlooking direction.

There is the irreversible color shifting ink of one deck on the surface of described anti-false sign.

On concaveconvex structure (pixel) on described security devices layer or between structure, the second level is set anti-fake encrpted.

Described cryptographic structure is groove or outstanding structure, and a width of groove or outstanding structure or length are in 150 nanometers or following, and the degree of depth or thickness are below 100 nanometers.

Described cryptographic structure is the structure with magnetic, optical property, and described magnetic, optical property have thickness between 10-100 nanometer, breadth wise dimension 50 nanometers to cycle size false proof in.

It is the sub pattern be separated that described optical anti-counterfeiting layer splits into several space a complete security pattern, and each sub pattern has fixing pixel and cycle; Or a complete pattern is splitted into several sub pattern, by several word patterns of splitting at several microns to some tens of pm yardstick, the pixel of each sub pattern in space be near but not overlapping.

Described security devices layer presents different colours, has periodic concaveconvex structure/pixel, cycle of described pixel/concaveconvex structure be 500 nanometers to 3 microns, the size of each pixel be the 0.3-0.7 in corresponding cycle doubly.

The ultimate principle of color-change optical false proof (optically variable device) technology utilizes optical interference or diffraction principle to make an anti-counterfeiting mark, and its color changes with the angle change of vision, and its principle of work as shown in Figure 1.Anti-false sign or pattern have convex-concave structure or optical grating constitution by surface, when the surface structure size of these convex-concaves is suitable, when white light is to surface, on certain visual angle, only has reflected wavelength lambda, the cycle of surface structure meets following equation

（1）

Time, reflected light is subject to the coherence stack of grating, and view directions can be seen pattern (the wherein θ of this color _dmfor visual angle, θ i is incident angle, and λ is wavelength, n _d,n _ifor the optical refractive index of medium, Λ is the cycle of structure).We call a pixel this basic concaveconvex structure, utilize the anti-false sign of such structural design, when the macroscopic direction of change, the light of different colours can meet equation (1) successively, and such anti-false sign just can change with the visual angle of observer and present different colors.Modern color photocopying and printing technique, no matter how advanced, all cannot copy such security pattern.What Fig. 2 represented be one group, and convex-concave structure is identical or pixel is identical, cycle different design.If we adopt Fig. 2 to represent in the pattern of security devices, adopt identical Pixel Design, different sub pattern adopts the different cycles to realize.Like this, we on identical visual angle, can see that different sub pattern presents different colors, and when changing visual angle, the part of different colours presents again different color changes.Do not change convex-concave structure look exactly like element cycle prerequisite under, if change pixel to overlook the symmetry on direction, as shown in Figure 3, adopt square, circle and the pixel represented by straight line pie graph one, such pattern color can also present different color change process with the change at visual angle.

Fig. 4 be adopt Fig. 2 mention employing same pixel, different cycles design concrete schematic diagram.The design concept of the anti-false sign that the utility model relates to also can adopt shown in Fig. 5, a security pattern is splitted into the several sub pattern overlaped.Each sub pattern is spatially divided into the pixel of 10-50 micron size, and the pixel of different piece is spatially immediately connected but not overlapping, and the pixel of same sub-image case is identical with the cycle to be designed.Such design with the difference at visual angle, in the identical sub pattern spatially can seeing different colours.

Fig. 6 adopts the linear pixel mentioned in Fig. 3, and the pixel of each sub pattern is identical, the cycle is identical, but moving towards of pixel is different, the microtexture schematic diagram of the security devices designed like this.

Fig. 7 is an example of security pattern design.This is the segmentation design drawing of five-Grain Liquor mark, and this mark network can be downloaded.Word and pattern are divided into two different sub pattern.To each subgraph of this segmentation in Fig. 8, we adopt same period, have the optical effect schematic diagram of different symmetric Pixel Design.

The color change anti-fake mark that the utility model adopts has and by the advantage of duplicating and printing technique copies, can not be used in the anti-counterfeiting technology of banknote.As banknotes more than 50 Euros of face amounts.Because banknote is repeatedly and Long-Time Service, such anti-false sign will be printed in flexible metal forming usually, so just greatly loses the comprehensive advantage of such anti-counterfeiting design.The utility model makes full use of such color change optical principle and designs that to be applicable to bottled product (drinks, medicine and cosmetics) false proof, the anti-counterfeiting technology especially on bottle cap.We are from structural design below, and realizing on bottle cap sets forth advance of the present utility model and unique anti-counterfeit capability in two.

Anti-false sign prepared by as represented in fig. 3 three kinds conventional pel arrays, has axisymmetric cross section structure if adopted, may there is a kind of potential threat.That is exactly the anti-counterfeiting mark that the expert with advanced laser hologram photography technology can utilize commodity, and when not broken also this anti-fake mark, imitated anti-fake mark is out with the naked eye very indistinguishable.This is also a deadly defect of Laser Holographic Counterfeit-proof Technique.The cross section of the anti-counterfeit structure of the preparation of Laser Holographic Counterfeit-proof Technique has axial symmetry, and the change of its optical diffraction color also presents identical axial symmetry.The anti-false sign of invention adopts the micron/nano process technology of microelectric technique use, and the optical anti-counterfeiting device obtained like this has the cross section structure shown in Fig. 9.With such cross section not any axis of symmetry of tool pixel form anti-false sign, only can see in the direction of surface structure hypotenuse pattern and color change.Even if this anti-counterfeiting mark is copied by light holographic technique, counterfeit anti-false sign can see pattern and color change in both direction.Like this, the anti-fake mark that the utility model provides stops the counterfeit of holographic technique completely.In addition, the utility model also proposes the anti-false sign of the second level.The pixel of the optical anti-counterfeiting device of the color change related to based on the utility model, as the size of square or circle, or the width of straight line is in 200-1000 nanometer.On the security devices of 5 mm in sizes, has the pixel that 100,000 small like this at least.We prepare the structure of micron/nano in these pixels, and as groove structure, or yardstick is in 50-10000 nanometer, are randomly dispersed in diffracting layer structure, as shown in Figure 10.Such mechanism does not produce on the optical effect of the false proof diffracting layer of the first order impact that any naked eyes can distinguish, also cannot copy with laser holography.Utilize these structures to carry out superencipher to diffracting layer, false proof beautiful fingerprint judging technique can be provided for manufacturer or expert.Such design also can be stopped holographic counterfeit completely and be provided false proof fingerprint identification function.

Therefore invention the second anti-counterfeiting technology that color-change optical security devices carries out is ensured that this anti-counterfeiting technology can stop the counterfeit of any holographic technique, but also provide fingerprint identification function for security devices.

The optic metachromatic anti-counterfeiting technology of present commercialization, is normally buried in the security devices with convex-concave structure inside other layer of material, as shown in figure 11.Counterfeiter can be avoided so directly surface structure to be carried out nano impression and to prepare new template, massive duplication is carried out to anti-false sign.Technology of burying although it is so does not stop imitated person principle, and especially such security devices is if for nonexpondable products such as banknotes, and these anti-false signs must be wear-resisting.If imitated person has outstanding material and chemical knowledge, he is just wear-resisting these possibly, and the security devices of Long-Time Service is separated and copied from buried structure, obtains the security pattern the same with actual products.The superencipher combine with technique optics that the utility model proposes, electricity or magnetics encryption, imitated person cannot know the details of encryption, therefore cannot copy the Counterfeit Item can with fingerprint identification.In addition, the utility model will be integrated on bottle cap the optic metachromatic anti-false sign through superencipher, this anti-false sign surface coverage layer of transparent optical disclour printing ink.When consumer uses product, ink irreversibly becomes opaque from transparent, and anti-false sign uses with first time of product and damages.Anti-fake mark is avoided to be re-used by lawless person.Therefore, the utility model discloses a kind of single use, the optic metachromatic anti-false sign that cannot copy with laser holography.

We can see the priority of color-change optical anti-counterfeiting design disclosed in the utility model: simplicity of design is easy to consumer's identification and is single use, all counterfeiters such as utilization to be duplicated, printing technique and laser hologram are imitative and stop outdoors.

The realization of the anti-fake mark that the utility model relates to:

1, the utility model can utilize microelectronic plated film, inscription, corrosion and electroplating technology that security devices is made template, also can to this template superencipher;

2, the anti-false sign of template and nano impression (Nanoimprinting) technology massive duplication low cost is utilized;

3, the anti-false sign that second step obtains is integrated on bottle cap, and on anti-fake mark, applies one deck optical ink coating.

At the upper optical anti-counterfeiting mark adopting the non-laser holographic technique of color change to prepare of bottle cap (bottle, medicine bottle and cosmetics), a large feature of this anti-counterfeiting design is exactly the change at visual angle, and anti-false sign presents different colors.Optical anti-counterfeiting mark in bottle cap forms nonrecoverable anti-fake mark together with irreversible color shifting ink coating, can not reuse.

The utility model is to stop to copy printing etc. common counterfeit and have the holographic counterfeit and micron/nano of the light of expertise and technology and copy counterfeit.In false proof distinguishing ability, because adopt design and the color change of simple, intuitive, ordinary consumer can differentiate the true and false of mark very soon with eyes.Because be single use, such anti-fake mark cannot be reused, and can ensure the authenticity of consumer spending product.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.

Claims (8)

1. a nanometer anti-counterfeit structure, is characterized in that: comprise diffracting layer and encryption layer, and described encryption layer embeds periodic diffracting layer; Described periodic diffracting layer has asymmetric cross section structure, and the difference in height of its structure is between 50 nanometers to 500 nanometers, and the cycle of its structure is between 300 nanometers are to 2 microns; Described encryption layer is groove or outstanding structure.

2. nanometer anti-counterfeit structure according to claim 1, it is characterized in that: the vertical view of the basic cell structure of the diffracting layer of described nanometer anti-counterfeit structure is square, circle, straight line, have the circular arc of circular symmetry a part or there are 3 solid axles overlooked on direction, 5 solid axles and 6 solid axle symmetry.

3. nanometer anti-counterfeit structure according to claim 1, is characterized in that: diffracting layer is embedded in second level cryptographic structure.

4. nanometer anti-counterfeit structure according to claim 3, it is characterized in that: described second level cryptographic structure is nanostructured, these second level cryptographic structure being embedded in diffracting layer are groove or outstanding structure, its width or length are in 200 nanometers or following, and the degree of depth or thickness are below 200 nanometers.

5. nanometer anti-counterfeit structure according to claim 3, it is characterized in that: described second level cryptographic structure is micrometer structure, these second level Sealing mechanisms being embedded in diffracting layer are groove or outstanding structure, its width or length are between 500 nanometers are to 10 microns, and the degree of depth or thickness are below 50 nanometers.

6., according to the arbitrary described nanometer anti-counterfeit structure of claim 4 or 5, it is characterized in that: described second level cryptographic structure is the structure with magnetic, optical property.

7. nanometer anti-counterfeit structure according to claim 1, is characterized in that: described nanometer anti-counterfeit structure also comprises and has the irreversible optical ink layer from transparent to opaque change of one deck at least.

8. nanometer anti-counterfeit structure according to claim 1, is characterized in that: what described nanometer anti-counterfeit structure had layer of transparent at least buries protective seam.