CN209728803U - A kind of magnetic anti-counterfeiting chip - Google Patents
A kind of magnetic anti-counterfeiting chip Download PDFInfo
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- CN209728803U CN209728803U CN201920742102.9U CN201920742102U CN209728803U CN 209728803 U CN209728803 U CN 209728803U CN 201920742102 U CN201920742102 U CN 201920742102U CN 209728803 U CN209728803 U CN 209728803U
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Abstract
The utility model proposes a kind of magnetic anti-counterfeiting chips, including substrate, information labels code, magnetics security code, optical tag code and magnetics security code are located on substrate, optical tag code is used to read the label information of anti-counterfeiting chip, and magnetics security code is made of several magnet units, and magnet unit has soft magnetism unit, or Hard Magnetic unit, perhaps anti-iron unit or recombiner unit, the anti-counterfeiting information of magnetic anti-counterfeiting chip include the Surface field distribution under the magnetization curve and specific incentives magnetic field of magnetics security code.
Description
Technical field
The utility model relates to a kind of anti-counterfeit fields, are related specifically to a kind of based on magnetic anti-counterfeiting chip.
Background technique
All the time, the false distinguishing of the valuables such as noble metal, jewel, antique, historical relic, certificate all just needs the group of profession
Team completes with professional precision instrument, wherein many valuables are that the experience of expert is leaned on to discern the false from the genuine.With science
The progress of technology, emulation technology also increasingly improve, and the valuables of forgery are more and more true to nature, and traditional false distinguishing means can be gradually difficult
With reply.
The identification system of a large amount of commercial operations is the magnetic head of cash inspecting machine for bank note exploitation at present, by reading and analyzing
The optics and Magnetics characteristL code of bank note, to judge the true and false of bank note.But since valuables are different, there is presently no general
Detection device detect valuables, for jewelry, be difficult in its surface printing larger-size magnetics and
Optical thin film.
Utility model content
In view of the above technical problems, the utility model proposes a kind of magnetic anti-counterfeiting chip, the utility model do not destroy it is expensive
Under the premise of heavy articles ontology, antiforge function is played.
The utility model is realized according to following technical scheme:
A kind of magnetic anti-counterfeiting chip, which is characterized in that including substrate, information labels code, magnetics security code, be arranged on substrate
Information labels region and the anti-fake region of magnetics, wherein information labels code is formed in the information labels region of substrate by etching, or
Person is attached in the information labels region of substrate by plating mode, and magnetics security code is made of one or more magnet units,
The magnetics security code is formed in the anti-fake region of magnetics of the substrate by etching, the anti-counterfeiting information of the magnetics security code
It the magnetization curve that is collectively formed including single magnet unit or multiple magnet units and is observed by external detection equipment
The magnet unit under the action of an external magnetic field Surface field distribution, the size of magnetic anti-counterfeiting chip is nanoscale.
In above-mentioned technical proposal, information labels code be text or two dimensional code, the information of information labels code include merchandise classification,
Factory number and the date of production, information labels code are read by optical microscopy.
In above-mentioned technical proposal, magnet unit is single-layer membrane structure or multi-layer film structure.
In above-mentioned technical proposal, single-layer membrane structure includes soft magnetism unit, Hard Magnetic unit, anti-iron unit.
In above-mentioned technical proposal, multi-layer film structure successively includes inverse ferric magnetosphere, the first coupling layer, buffer layer, the second coupling
Layer, separation layer and free layer, the first coupling layer are opposite with the direction of magnetization of the second coupling layer.In above-mentioned technical proposal, soft magnetism list
The material of member includes permalloy, CoFe, CoFeB or amorphous.
In above-mentioned technical proposal, the material of Hard Magnetic unit includes CoPt alloy or ferrite.
In above-mentioned technical proposal, multi-layer film structure successively includes inverse ferric magnetosphere, the first coupling layer, buffer layer, the second coupling
Layer, separation layer and free layer, the first coupling layer are opposite with the direction of magnetization of the second coupling layer.
In above-mentioned technical proposal, the material of anti-iron unit includes PtMn, IrMn, Mn2Au、FeRh、Cr2O3Or BiFeO3。
In above-mentioned technical proposal, the material of inverse ferric magnetosphere includes PtMn, IrMn, Mn2Au、FeRh、Cr2O3Or BiFeO3,
The material of first, second coupling layer is that the material of CoFe perhaps CoFeB buffer layer is Ru or Ta, and the material of separation layer is
Cu, MgO or Al2O3, the material of free layer includes permalloy, CoFe, CoFeB or amorphous alloy.
Compared with prior art, the utility model has following advantageous effects:
The size of magnetics security code may diminish to nanoscale, and the size of the magnetic anti-counterfeiting chip thus constituted is smaller, Ke Yiqian
Enter into valuables, it is not easy to the person's of being forged discovery；Since magnetic anti-counterfeiting chip is smaller, valuables ontology can not destroyed
Under the premise of, play anti-fake function；Magnet unit inside magnetic anti-counterfeiting chip includes soft magnetism unit, Hard Magnetic unit, anti-iron list
The magnetic characteristic of member, one of recombiner unit or a variety of, every kind of unit is different, has complicated anti-counterfeiting information, can be improved
Anti-counterfeit capability.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon:
Fig. 1 is the overall structure diagram of magnetic anti-counterfeiting chip；
Fig. 2 is the side view of magnetics security code；
Fig. 3 is the pattern schematic diagram that a kind of magnetics security code is constituted；
Fig. 4 is the schematic diagram that magnetics security code is observed with detection device；
Fig. 5 is the pattern schematic diagram that another magnetics security code is constituted；
Fig. 6 is a kind of magnetization curve schematic diagram of soft magnetism unit；
Fig. 7 is a kind of magnetization curve schematic diagram of anti-iron unit；
Fig. 8 is the magnetization curve schematic diagram of another anti-iron unit；
Fig. 9 is a kind of magnetization curve schematic diagram of Hard Magnetic unit；
Figure 10 is a kind of magnetization curve schematic diagram in a direction of recombiner unit；
Figure 11 is the magnetization curve schematic diagram in another direction of the recombiner unit in Figure 10.
Specific embodiment
The utility model is described in detail combined with specific embodiments below.Following embodiment will be helpful to this field
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, several changes and improvements can also be made.
These are all within the protection scope of the present invention.
Embodiment one
Fig. 1 is the overall structure diagram of the magnetic anti-counterfeiting chip of the utility model embodiment one.As shown in Figure 1, a kind of magnetic
Anti-counterfeiting chip, including substrate, information labels code and magnetics security code, on the substrate 101 setting information label area 102 and magnetics
Anti-fake region 103.Wherein, information labels code is formed in the information labels region 102 of substrate 101 by etching, or passes through electricity
Plating mode is attached to 102 in the information labels region of substrate 101, and magnetics security code is made of one or more magnet units, magnetic
It learns security code to be formed in the anti-fake region 103 of magnetics of substrate 101 by etching, the anti-counterfeiting information of magnetics security code includes single
The magnetization curve and observed outside by external detection equipment that a magnet unit or multiple magnet units collectively form
The Surface field of the magnet unit under magnetic fields is added to be distributed, the size of magnetic anti-counterfeiting chip is nanoscale.
Specifically, different according to application, the area of substrate 101, information labels region 102 and the anti-fake region 103 of magnetics can
With free setting, external detection equipment can be magnetic field observation piece, magnetic force microscopy or magneto-optical kerr microscope, externally-applied magnetic field
Can be permanent magnet, current coil or other can produce the object or equipment in magnetic field.
Embodiment two
Fig. 2 is the side view of the magnetics security code of the utility model embodiment two.As shown in Fig. 2, a kind of magnetic anti-counterfeiting chip,
Including substrate 201, information labels code, magnetics security code, setting information label area and the anti-fake region of magnetics on substrate,
In, information labels code is formed in the information labels region of substrate by etching, or the letter of substrate is attached to by plating mode
It ceases in label area, magnetics security code is made of one or more magnet units, and magnetics security code is formed in substrate by etching
The anti-fake region of magnetics in, the anti-counterfeiting information of magnetics security code includes that single magnet unit or multiple magnet units collectively form
Magnetization curve and the magnet unit under the action of an external magnetic field observed by external detection equipment Surface field point
Cloth, the size of magnetic anti-counterfeiting chip are nanoscale.
Information labels code is text or two dimensional code, and the information of information labels code includes merchandise classification, factory number and factory
Date, information labels code are read by optical microscopy.Specifically, the information labels code in the present embodiment is text, pass through quarter
Erosion mode is formed in the information labels region of substrate 201.
Magnet unit is single-layer membrane structure or multi-layer film structure, and single-layer membrane structure includes the soft magnetism list for being spaced apart from each other arrangement
Member 202, Hard Magnetic unit 203 and anti-iron unit 204.
Specifically, the pattern citing that a kind of magnetics security code that Fig. 3 is the utility model embodiment two is constituted.In order to increase
Identification, the magnet unit on substrate 301 can be made any shape, and multiple magnet units may be constructed any array,
As shown in figure 3, the shape of magnet unit 302 can be 1 × 4 circular array, magnet unit 303 can be 1 × 4 ellipse
Array, magnet unit 304 can be 1 × 4 rectangular array, and magnet unit 305 can be 1 × 4 rectangular array, wherein array
In magnet unit can be soft magnetism unit, Hard Magnetic unit, anti-iron unit, any one or more in recombiner unit.
Specifically, Fig. 4 is a kind of showing with external detection equipment observation magnetics security code of the utility model embodiment two
It is intended to, to put it more simply, being only provided with 2 magnet units 402 and 403 on substrate 401.Probe 404 is for reading magnet unit
402 and 403 magnetics information, probe 404 can be plane Kerr magnetooptical effect probe or magnetic force microscopy probe.In base
The outside of plate 401, have 405 and 406,405 and 406 for applying externally-applied magnetic field magnetic source can be permanent magnet, electromagnet or
Person's helmholtz coil；Meanwhile magnetic source also can be set in substrate lower part, to change the direction of externally-applied magnetic field.
The material of soft magnetism unit includes permalloy, CoFe, CoFeB or amorphous alloy.
The material of Hard Magnetic unit includes CoPt alloy or ferrite.
The material of anti-iron unit includes PtMn, IrMn, Mn2Au、FeRh、Cr2O3Or BiFeO3。
Multi-layer film structure successively includes inverse ferric magnetosphere, the first coupling layer, buffer layer, the second coupling layer, separation layer and freedom
Layer, the first coupling layer are opposite with the direction of magnetization of the second coupling layer.
The material of inverse ferric magnetosphere includes PtMn, IrMn, Mn2Au、FeRh、Cr2O3Or BiFeO3, the first, second coupling layer
Material be the material of CoFe perhaps CoFeB buffer layer be the material of Ru perhaps Ta separation layer be Cu, Mgo or Al2O3, from
It include permalloy, CoFe, CoFeB or amorphous alloy by the material of layer.
Specifically, multi-layer film structure successively includes but is not limited to inverse ferric magnetosphere, the first coupling layer, buffer layer, the second coupling
Layer, separation layer and free layer.Inverse ferric magnetosphere in recombiner unit 205 has anti-ferromagnetism, and material includes but is not limited to PtMn,
IrMn, Mn2Au, FeRh, Cr2O3, BiFeO3, the coupling layer material in recombiner unit 205 is CoFe or CoFeB, recombiner unit
Cushioning layer material in 205 is Ru or Ta, and the free layer in recombiner unit 205 has a soft magnetic characteristic, and material includes but not
It is limited to permalloy or CoFe or CoFeB or amorphous alloy.The first coupling layer and second in recombiner unit 205
The direction of magnetization of coupling layer is opposite.
Embodiment three
Fig. 5 is the schematic diagram for another magnetics security code that the utility model embodiment three provides.As shown in figure 5, a kind of
Magnetic anti-counterfeiting chip, including substrate, information labels code and magnetics security code, setting information label area and magnetics on substrate 501
Anti-fake region.Wherein, information labels code is formed in the information labels region of substrate 501 by etching, or passes through plating mode
It is attached in the information labels region of substrate 501, magnetics security code is made of one or more magnet units, and magnetics security code is logical
Over etching is formed in the anti-fake region of magnetics of substrate 501, the anti-counterfeiting information of magnetics security code include single magnet unit or
Magnetization curve that multiple magnet units collectively form and by external detection equipment observe under the action of an external magnetic field
The Surface field of magnet unit is distributed, and the size of magnetic anti-counterfeiting chip is nanoscale.
Information labels code is text or two dimensional code, and the information of information labels code includes merchandise classification, factory number and factory
Date, information labels code are read by optical microscopy.Specifically, the information labels code in the present embodiment is two dimensional code, pass through
Plating mode is attached to the information labels region of substrate 501.
Magnet unit is single-layer membrane structure or multi-layer film structure, and single-layer membrane structure includes the soft magnetism list for being spaced apart from each other arrangement
Member 502, Hard Magnetic unit 503 and anti-iron unit 504.Specifically, the shape of soft magnetism unit 502 can be 1 × 4 oval battle array
Column, the shape of Hard Magnetic unit 503 can be 1 × 4 rectangular array, and the shape of anti-iron unit 504 can be 1 × 4 circle
Column, the shape of recombiner unit 505 can be " 1 " printed words of composition.
The material of soft magnetism unit includes permalloy, CoFe, CoFeB or amorphous alloy.
The material of Hard Magnetic unit includes CoPt alloy or ferrite.
The material of anti-iron unit includes PtMn, IrMn, Mn2Au、FeRh、Cr2O3Or BiFeO3。
Multi-layer film structure successively includes inverse ferric magnetosphere, the first coupling layer, buffer layer, the second coupling layer, separation layer and freedom
Layer, the first coupling layer are opposite with the direction of magnetization of the second coupling layer.
The material of inverse ferric magnetosphere includes PtMn, IrMn, Mn2Au、FeRh、Cr2O3Or BiFeO3, the first, second coupling layer
Material be the material of CoFe perhaps CoFeB buffer layer be the material of Ru perhaps Ta separation layer be Cu, Mgo or Al2O3, from
It include permalloy, CoFe, CoFeB or amorphous alloy by the material of layer.Specifically, Fig. 6 is oval soft magnetism unit in Fig. 5
Magnetization curve, material CoFeB, wherein abscissa is externally-applied magnetic field H, and ordinate is magnetization M, ordinate and abscissa
Ratio be magnetic susceptibility χ.The curve A from figure6As it can be seen that magnetic susceptibility χ is larger when the value of externally-applied magnetic field is smaller, work as externally-applied magnetic field
(the X in such as figure when reaching saturation field Hs61), soft magnetism unit enters saturation, and magnetic susceptibility χ decline, the corresponding intensity of magnetization is at this time
Saturation magnetization Ms (the Y in such as figure61)。X62And Y62It is when applying opposing magnetic field, corresponding saturation magnetic field and saturated magnetization are strong
Degree.When χ, Hs, Ms for detecting soft magnetism unit deviate design value, determine that commodity are counterfeit.
Fig. 7 is the magnetization curve of round anti-iron unit in Fig. 5, material Cr2O3, wherein abscissa is externally-applied magnetic field H, is indulged
Coordinate is magnetization M, and the ratio of ordinate and abscissa is magnetic susceptibility χ, compared with soft magnetism unit, such as curve A7It is shown, instead
The magnetic susceptibility χ of iron unit does not change with externally-applied magnetic field and is changed, and the value of magnetic susceptibility χ is closer to 1.
Fig. 8 is the magnetization curve of another material of round anti-iron unit in Fig. 5, and wherein abscissa is externally-applied magnetic field H, is indulged
Coordinate is magnetization M, and the ratio of ordinate and abscissa is magnetic susceptibility χ.Such as Fig. 8 upper curve A81With curve A82It is shown, outside
When adding magnetic field smaller, neighboring magnetic moments are antiparallel, intensity of magnetization very little；With the increase of externally-applied magnetic field, when magnetic field reaches X81When, phase
Adjacent magnetic moment antiparallel state is broken, and Net magnetic moment occurs, and the intensity of magnetization increases；Externally-applied magnetic field is continued growing, when magnetic field reaches X82
When, the distribution of magnetic moment reaches stable state, and the intensity of magnetization is not further added by；With continuing growing for externally-applied magnetic field, when magnetic field reaches
X83When, the stability of magnetic moment distribution is broken again, the intensity of magnetization again with outfield increase and increase, until all magnetic
Square is along externally-applied magnetic field direction, and corresponding externally-applied magnetic field is X at this time84。
By the magnetization curve shape for examining anti-iron unit, it can be determined that whether commodity are certified products.
Fig. 9 is the magnetization curve of rectangle Hard Magnetic unit in Fig. 5, and wherein abscissa is externally-applied magnetic field H, and ordinate is that magnetization is strong
M is spent, such as two curve A parallel to each other in Fig. 91And A92It is shown, two curves respectively with the intersection point X of abscissa91And X92It is hard
The coercivity of magnetic cell, two curves respectively with the intersection point Y of ordinate91And Y92It is the remanent magnetism of Hard Magnetic unit.
Pass through detection coercivity and remanent magnetism, it can be determined that whether commodity are certified products.
Figure 10 is a kind of magnetization curve in a direction of recombiner unit in Fig. 5, soft magnetism unit using permalloy,
Hard Magnetic unit is using CoPt alloy, and anti-iron unit is using PtMn.Such as A in Figure 101001And A1002Shown in two curves,
Abscissa is externally-applied magnetic field H, and ordinate is magnetization M.Similar to the soft magnetism unit of Fig. 6, recombiner unit has saturation magnetic field
X1001And X1002, saturation magnetization Y1001And Y1002, but with the increasing in positive magnetic field, it may appear that the magnetic hysteresis of similar Fig. 9 is returned
Line (i.e. curve A1001With curve A1002No longer it is overlapped), X1003And X1004The half of the difference in corresponding magnetic field is coercivity, Y1005
Corresponding magnetic field is remanent magnetism, and biggish negative sense magnetic field can't generate hysteresis loop.
Figure 11 is the magnetization curve in another direction of the recombiner unit in Figure 10, such as curve A in Figure 111101It is shown, this
A direction is vertical with the direction in Figure 10.As seen from the figure, the soft magnetism unit magnetization curve phase of the magnetization curve with Fig. 6 of the direction
Together.
For recombiner unit, whether the magnetization curve for needing to detect both direction is identical with design, if identical,
Then illustrate that commodity are certified products.
Fig. 6-8 depicts the magnetization curve of single magnet unit, if measured zone includes two kinds of magnet units, by two
The magnetization curve that kind magnet unit is constituted also has specific curve shape, passes through the song for comparing the magnetization curve measured and design
Line, it can be determined that whether commodity are certified products.
Different externally-applied magnetic fields, externally-applied magnetic field need the magnetic field for being arranged to change over time in order to obtain.
For all material of Fig. 6-11, as long as there is the intensity of magnetization, around certainly exist magnetic field, with magnetic force microscopy or
Person's magneto-optical kerr microscope, can detect magnetic field, and export the figure of Distribution of Magnetic Field.If the magnetic field detected and design
It is identical, that is, it can determine that commodity are certified products.
Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
All other embodiment obtained, fall within the protection scope of the utility model.Although the utility model just side of preferred implementation
Formula is illustrated and has been described, it is understood by those skilled in the art that without departing from the claim of the utility model
Limited range can carry out variations and modifications to the utility model.
Claims (9)
1. a kind of magnetic anti-counterfeiting chip, which is characterized in that including substrate, information labels code, magnetics security code, set on the substrate
Confidence ceases label area and the anti-fake region of magnetics, wherein the information labels code is formed in the information of the substrate by etching
Label area, or be attached in the information labels region of the substrate by plating mode, magnetics security code is by one or more
A magnet unit is constituted, and the magnetics security code is formed in the anti-fake region of magnetics of the substrate by etching, the magnetics
The anti-counterfeiting information of security code includes the magnetization curve that single magnet unit or multiple magnet units collectively form and passes through outer
The Surface field for the magnet unit under the action of an external magnetic field that portion's detection device is observed is distributed, the magnetic anti-counterfeiting chip
Size be nanoscale.
2. a kind of magnetic anti-counterfeiting chip according to claim 1, which is characterized in that the information labels code is text or two dimension
Code, the information of the information labels code includes merchandise classification, factory number and the date of production, and the information labels code passes through optics
Microscope is read.
3. a kind of magnetic anti-counterfeiting chip according to claim 1, which is characterized in that the magnet unit be single-layer membrane structure or
Person's multi-layer film structure.
4. a kind of magnetic anti-counterfeiting chip according to claim 3, which is characterized in that the single-layer membrane structure includes soft magnetism list
Member, Hard Magnetic unit and anti-iron unit.
5. a kind of magnetic anti-counterfeiting chip according to claim 4, which is characterized in that the material of the soft magnetism unit includes perm
Alloy, CoFe, CoFeB or amorphous alloy.
6. a kind of magnetic anti-counterfeiting chip according to claim 4, which is characterized in that the material of the Hard Magnetic unit includes CoPt
Alloy or ferrite.
7. a kind of magnetic anti-counterfeiting chip according to claim 4, which is characterized in that the material of the anti-iron unit includes
PtMn、IrMn、Mn2Au、FeRh、Cr2O3Or BiFeO3。
8. a kind of magnetic anti-counterfeiting chip according to claim 3, which is characterized in that the multi-layer film structure successively includes anti-iron
Magnetosphere, the first coupling layer, buffer layer, the second coupling layer, separation layer and free layer, first coupling layer are coupled with described second
The direction of magnetization of layer is opposite.
9. a kind of magnetic anti-counterfeiting chip according to claim 8, which is characterized in that the material of the inverse ferric magnetosphere includes
PtMn、IrMn、Mn2Au、FeRh、Cr2O3Or BiFeO3, the material of first, second coupling layer is CoFe or CoFeB,
The material of the buffer layer is that the material of the Ru perhaps Ta separation layer is Cu, MgO or Al2O3,The material of the free layer
Including permalloy, CoFe, CoFeB or amorphous alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920742102.9U CN209728803U (en) | 2019-05-22 | 2019-05-22 | A kind of magnetic anti-counterfeiting chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920742102.9U CN209728803U (en) | 2019-05-22 | 2019-05-22 | A kind of magnetic anti-counterfeiting chip |
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| Publication Number | Publication Date |
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| CN209728803U true CN209728803U (en) | 2019-12-03 |
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| CN201920742102.9U Active CN209728803U (en) | 2019-05-22 | 2019-05-22 | A kind of magnetic anti-counterfeiting chip |
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