JP2009075786A - Information recording medium and its attached object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recording medium and its attached object capable of performing highly accurate authenticity determination in which identification of a portion where information is added thereon is difficult. <P>SOLUTION: The information recording medium 30 for configuring a geometric pattern by line portions 31b, 32b which are minutely demetallized makes a resonant area 32 difficult to be distinguished from the other non-resonant area, and makes it difficult to be recognized that the information is added by providing a conductive portion to the line portion 32b of the resonant area 32. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an information recording medium and a patch. In particular, the present invention relates to a machine-readable information recording medium in which an information recording medium is attached to a printed matter such as securities such as banknotes and stock certificates, various certificates and valuable documents.

Traditionally, as a measure to prevent counterfeiting and alteration of printed matter such as banknotes and stock certificates, various certificates and valuable documents, mainly the use of sticking metal foil etc. to printed matter and / or a pattern with many geometric patterns There is a method used for design.

In order to dismiss counterfeiters, forgery and alteration prevention measures with metal foil attached to printed materials have been adopted in too many precious printed materials and products in recent years, so the principle has been learned, and counterfeiting and copying It is getting easier. In addition, with the improvement of microfabrication technology, metal foils with high reproducibility that cannot be discriminated at first glance are on the market.

In the inspection of printed matter having a diffraction grating, a hologram foil, etc., for example, a metal film is applied to the base material of the security thread by a method such as vacuum deposition, chemical etching or laser etching, and the metal film is partially patterned in a repeated pattern. A technique is disclosed in which, when the paper with the security thread removed is passed through a microwave detector or the like, the repeat pattern of the security thread is compared with the pattern of the genuine printed matter to determine authenticity (for example, , See Patent Document 1).

This technique detects whether the previous security thread simply has a security thread, or whether there are characters on the security thread, i.e., has been partially removed. On the other hand, paying attention to the fact that the security thread that has removed the metal coating partly in a repetitive pattern by going one step further generates a waveform pattern of a certain microwave detection voltage, the waveform pattern of the microwave detection voltage is a genuine print Compared with that of, the authenticity is discriminated.

In addition, a part of the metal vapor deposition layer or a part of the metal layer and a pre-formed heat-sensitive adhesive layer is removed by laser processing into a slit shape or a mesh shape, and the region including the removed portion is pseudo transparent or semi-transparent. A metal contact type thermal transfer hologram sheet on which a pseudo-transparent hologram is formed and a processing method thereof (for example, see Patent Document 2) have been proposed.

Forgery and alteration prevention measures using a geometric pattern include a ground pattern / color pattern, a relief pattern, etc., and the pattern is basically constituted by a set of curved lines with a fixed line width. These patterns can take counterfeiting and alteration prevention measures in consideration of design properties such as the design of printed matter, and make the same pattern in the forgery difficult by making the pattern complicated.

In addition, these patterns are widely used worldwide in the design of valuable printed materials, and at the same time, they have been used for a long time as printed patterns having the monetary value of securities such as banknotes and stock certificates. In general, it has become an important pattern as a design that impresses luxury. Therefore, in the printed matter such as securities such as banknotes and stock certificates, various certificates and important documents, the background pattern, the color pattern, the relief pattern, and the like are indispensable in design.

Japanese Patent No. 2906352 JP 2003-226085 A

In Patent Document 1, a safety thread in which a metal film is partially removed with a repetitive pattern is configured to generate a waveform pattern of a constant microwave detection voltage. However, the thread is removed from a portion having a conductive portion. Since there are two types of regions that do not exist, only the change in analog voltage based on the presence or absence of conductivity can be obtained from the detected voltage waveform. For this reason, it is difficult to accurately determine true / false even if an operation is performed based on this waveform pattern for identification. Furthermore, there is a problem in that when the waveform pattern is subjected to a conveyance error or noise, it becomes more inaccurate.

In Patent Document 2, the area where the removal process is performed is seen through the back of the metal vapor deposition type thermal transfer hologram sheet, functions as a pseudo transparent sheet, and the portion of the metal vapor deposition layer that remains without being removed is Although the hologram effect is maintained, when a fine line or point is formed due to variations in the output of the laser beam, the size of the line or point changes, which is not suitable.

In addition, holograms and the like give a viewer a high level of aesthetic appeal with a plurality of complex images, but storing such images does not verify actual hologram images, but includes holograms and the like. It is only to confirm this, and it will not be understood even if a crude counterfeit or substitute of a commercial hologram is used instead of a real hologram or the like. When such a hologram or the like is used as a machine reading element, there is a method in which reading is performed by an arbitrarily set conductor adhesion region. However, if the reading region is easily visually recognized, a similar metal foil is applied to the paper surface. There is a possibility that forging and data alteration that are cut and pasted may be easy.

The present invention has been considered in view of the above circumstances, and a conductor non-adherent region demetalized into an arbitrary pattern with a fixed line width on an information recording medium comprising a conductor adhering region and a conductor non-adhering region. And forming a non-adhering region of the conductor formed by a part of an arbitrary pattern having a portion that is not demetalized, thereby performing camouflaging of the machine reading region and true / false accuracy. It is an object of the present invention to provide an information recording medium capable of being discriminated and an attached material thereof.

The invention according to claim 1 of the present invention is an information recording medium comprising a first pattern and a second pattern composed of a conductor adhering region and a conductor non-adhering region, wherein the first pattern Is formed by arranging a plurality of patterns formed by surrounding the conductor adhering region with the conductor non-adhering region as a unit pattern, and the second pattern is a part of the portion constituting the first pattern. Formed at least two or more of the unit patterns and arranged adjacent to each other in a certain direction, and provided with a conductive portion in a part of the conductor non-adhering region serving as a boundary between the adjacent portions, In the at least two or more unit patterns, the dimension of the longest part from one end to the other end through the conducting part is 1/2 ^{n of} the wavelength that resonates at a predetermined frequency (n is 0 or more) Having a conductor attachment region that is an integer) length An information recording medium according to symptoms.

The invention according to claim 2 of the present invention is the information recording medium according to claim 1, wherein the length of the conductor adhering region that resonates at the predetermined frequency is 4 mm. .

According to a third aspect of the present invention, in the information recording medium according to the first or second aspect, the predetermined length of resonance in the conductive pattern adhesion region of the first pattern is on a mechanical reading scan. The information recording medium is characterized by not being arranged.

According to a fourth aspect of the present invention, in the information recording medium according to the first to third aspects, a line width of the conductor non-adhering region surrounding the conductor adhering region is 0.05 to An information recording medium having a thickness of 0.15 mm.

According to a fifth aspect of the present invention, in the information recording medium according to the first to fourth aspects, the length of the conductive portion provided in a part of the conductor non-adhering region in the second pattern is 0. An information recording medium having a thickness of 0.05 to 0.15 mm.

The invention according to claim 6 of the present invention is characterized in that in the information recording medium according to any of claims 1 to 5, a lattice pattern is formed by regularly providing unit patterns constituting the first pattern. Information recording medium.

The invention according to claim 7 of the present invention is a printed sheet on which the information recording medium of the invention according to claims 1 to 6 is affixed.

According to the present invention, an information recording medium composed of a first pattern and a second pattern composed of a conductor adhering region and a conductor non-adhering region is displayed in an arbitrary pattern with a constant line width. By forming a metalized conductor non-adhering region and forming a part of the arbitrary pattern with a conductor non-adhering region formed with a portion that is not demetalized, it is possible to camouflage the area by machine reading. In addition, it is possible to determine authenticity with high accuracy.

Below, an example of an embodiment in an information recording medium of the present invention and its patch is explained based on a drawing.

FIG. 1 is a schematic diagram showing an embodiment of the present invention. The printing sheet 1 of the present embodiment is formed by sticking an information recording medium 30 to paper or the like that becomes the base material 2. In addition, although it is desirable to use the printing sheet 1 for securities as a security product, it may be a general product.

FIG. 2 is a cross-sectional view of the a-a ′ portion of FIG. 1. The information recording medium 30 on the substrate 2 is formed by laminating an adhesive layer 4, a hologram forming layer 5, and a protective layer 6 in this order from the bottom, and the unevenness on the top of the hologram forming layer 5 indicates a diffraction grating. Further, on the unevenness, a portion (thick line shown) covered with the conductive portion 7 and a portion of the hologram forming layer 5 only by demetalizing the conductive portion 7 are formed. Therefore, the tomogram of the information recording medium 30 includes the conductive layer 10 including the conductive portion 7 and the nonconductive layer 11 not including the conductive portion 7. The cross-sectional configuration of the information recording medium 30 shows an example, and a known configuration such as the same configuration of the adhesive layer 4 and the hologram layer 5 may be used, and a simple gold foil or silver foil without a diffraction grating may be used. A hologram with a diffraction grating formed is desirable. In addition, a known technique may be used as the demetallizing method, and examples thereof include a method of immersing in an alkaline solution to partially dissolve a metal, a method using a laser irradiation apparatus, and the like. The conductive portion 7 is specifically made of metal.

Next, FIGS. 3A and 3B are partially enlarged views of a plan view of the information recording medium 30 according to the present embodiment. The information recording medium 30 includes a conductor non-adhering region (hereinafter referred to as a non-resonant region) 31 and a conductor adhering region (hereinafter referred to as a resonance region) 32. The non-resonant region 31 and the conductive layer 31a are non-conductive. The resonance region 32 includes a conductive layer 32a and a nonconductive layer 32b. At this time, the conductive layers 31a and 32a include a metal such as aluminum, copper, nickel, and tin, and the non-conductive layers 31b and 32b are demetallized (removed from the metal) in an arbitrary linear shape (or image line). By doing so, it becomes an arbitrary geometric pattern as a collection of lines. In the future, for convenience of explanation, since the conductive layer 31a and the conductive layer 32a specifically include a metal layer, the “metal portion 31a” (the portion including the metal layer in the non-resonant region 31), the “metal portion 32a” ( On the other hand, the non-conductive layer 31b and the non-conductive layer 32b are specifically formed in the shape of a line formed by removing the metal, so that the “line portion 31b” (Parts that do not include the metal layer in the non-resonant region 31) and “line portions 32b” (portions that do not include the metal layer in the resonance region 32) will be described. Therefore, the conductive layer 10 of FIG. 2 shows the metal part 31a and the metal part 32a of FIG. 3, and the non-conductive layer 11 of FIG. 2 shows the line part 31b and the line part 32b of FIG.

In addition, as a feature of the present invention, an arbitrary geometric pattern includes a line portion 31b and a line portion 32b continuously formed at the boundary between the non-resonant region 31 and the resonance region 32, and the resonance region 32. The conductive portion is provided in a part of the inner line portion 32b, and the length L1 of the conductive portion of the line portion 32b is configured to be short (for example, 0.01 to 0.2 mm). According to this configuration, when the information recording medium 30 is visually recognized, the information recording medium 30 can be visually recognized as a uniform geometric pattern, and the conductive portion is not noticed in the line portion 32 b in the resonance region 32. If the line widths of the line portions 31b and 32b are 0.01 to 0.20 mm, preferably 0.05 to 0.15 mm, the line portions themselves become fine and difficult to see. Will improve. Further, for example, as an arbitrary geometric pattern, it is desirable to configure a lattice pattern regularly composed of quadrilaterals, or a geometric pattern combining triangles, squares, rhombuses, polygons, circles, and the like. Furthermore, it is desirable to make the line width and line pitch (interval) of the line portions constant, but the line width and pitch of the line portions may be changed. In addition, if the conduction | electrical_connection part said here is described correctly, the line | wire part 32b in the resonance area | region 32 will de-metalize continuously from one end of the resonance area | region 32 to the other end like 31b originally. A part of the line part 32b that is not demetalized with an arbitrary line width is set, and the line part 32b is made non-continuous to bring the resonance region 32 into a conductive state.

Further, as shown in FIG. 3, the non-resonant region 31 is arranged in a lattice pattern by line portions 31b continuous to the metal portion 31a. On the other hand, the resonance region 32 is a region surrounded by a line portion 31 b of the non-resonance region 31, and the line portion 32 b is arranged as a camouflage in the approximate center and the lateral direction of the resonance region 32. At this time, the line portion 32b is arranged to be a part of the line of the geometric pattern. In addition, as a structure of the line part 32b, one or more may be sufficient. FIG. 3A shows a configuration in which the line portion 32b is composed of one piece, and the line portion 32b is interrupted in the middle of the metal portion 32a. FIG. 3B shows a configuration in which two line portions 32b are formed, and one line portion 32b and the other line portion 32b are not in contact with each other. Therefore, the position where the conductive portion is provided in the line portion is arbitrary. The two line portions 32b are arranged on the same extension line, but may not be on the same extension line.

Next, mechanical reading of the information recording medium 30 will be described with reference to FIG. The resonance region 32 requires a metal portion 32a having a predetermined length L2 that resonates with a frequency at the time of machine reading. In addition, the width | variety of predetermined | prescribed length L2 to resonate, in FIG. 3, the length L1 of the conduction | electrical_connection part of the line part 32b is arbitrary. As a specific machine reading method, when the information recording medium 30 is irradiated with an electromagnetic wave in the direction of an arrow shown in the figure, the electromagnetic wave having a resonance frequency is re-radiated. For example, when measured by a microwave sensor, the metal portion 32a of the resonance region 32 has a predetermined length L2 that resonates at a predetermined frequency, and the predetermined length L2 that resonates is ½ ⁿ of the wavelength ( If n is an integer greater than or equal to 0), a large current flows along the length direction (vertical direction in the figure), so that resonance is obtained and true / false discrimination is possible. Therefore, the predetermined length L2 that resonates is almost perpendicular to the reading direction of the detector such as the microwave sensor and from the end of the metal part 30a of the resonance region 32, as shown in FIG. It is sufficient that the length to one end includes at least part of the length L2 that is 1/2 ⁿ of the wavelength that resonates at a predetermined frequency.

4A, 4B, and 4C are enlarged views of the resonance region 32 surrounded by the line portion 31b. The arrangement of the predetermined length L2 that resonates with the shape and frequency of the resonance region 32 is shown in FIG. Is shown. 4A shows the resonance region 32 as a rectangle, FIG. 4B shows the resonance region 32 as a triangle, and FIG. 4C shows the resonance region 32 as a fan, both of which are in the reading direction (XX ′). It is designed to be a predetermined resonating length L2 (dotted line portion shown in the figure) that resonates with the frequency by the conducting portion in the line portion 32b. As a reading method using a machine, Japanese Patent Application No. 2006-26652 previously filed by the same applicant may be used.

In the configuration of the information recording medium 30 of the present invention, the camouflage property of the resonance region 32 is high when viewed in a normal state as compared with the configuration in which the resonance region 32 does not have the line portion 32b, and the region is recognized as a machine reading region. However, stable reading is possible during machine reading. Moreover, since the line parts 31b and 32b are finely configured by demetalization or the like, they are excellent in the anti-counterfeit effect.

Example 1 FIG. 5 shows an information recording medium 30 according to one embodiment of the present invention. FIG. 5A is a plan view of the information recording medium 30, and a plurality of resonance regions 32 are provided in an elliptical non-resonance region 31. In addition, the non-resonant region 31 and the resonance region 32 are provided with metal portions 31a and 32a and line portions 31b and 32b in substantially the same shape. It is a scientific pattern. In this embodiment, as an example, a lattice pattern (or mesh pattern) in which vertical lines and horizontal lines are combined, and the line portions 31b and 32b have a line width of 0.1 mm and a line pitch of 2.0 mm.

FIG. 5B is an enlarged view of the resonance region 32 and its periphery. The line portions 32b (horizontal lines in the figure) in the resonance region 32 are arranged in a lattice pattern together with the line portions 31b in the non-resonance region 31, and are arranged so as not to partially touch the line portions 31b around the resonance region 32. At this time, the length of the conducting portion (L1 shown in FIG. 3) is designed to be 0.1 mm, and the predetermined length L2 for resonance is designed to be 4 mm. In addition, although the camouflage property when visually recognizing improves as the length L1 of the conductive portion is shorter, it is preferably 0.05 to 0.15 mm in consideration of an abrasion in the case of demetalization.

The information recording medium 30 has excellent anti-counterfeiting effects due to the demetallized fine line portions 31b and 32b by attaching the information recording medium 30 to a securities printed matter 1 ′ such as a gift certificate or stock certificate via an adhesive layer, In addition, a machine-readable printed material can be provided.

FIG. 6 illustrates an example of the case where the printed securities 1 'to which the information recording medium 30 is affixed and authenticity determination is performed by machine reading. 6A. On the information recording medium 30 of the securities printed matter 1 ′ in FIG. 6A, more specifically, on the metal portion 32a of the resonance region 32, the direction within a predetermined length L2 that resonates and substantially orthogonal. Then, measure with a microwave sensor. Therefore, in the information recording medium 30 in FIG. 5A, the resonance regions 32 are arranged in four places on the upper, lower, left, and right sides. By reading in the direction (YY ′), different wavelengths can be obtained in each resonance region. In this embodiment, four resonance regions are provided in order to enable reading in any of the vertical and horizontal directions. However, there is no restriction and one resonance region may be used.

FIG. 6A shows an example of reading in the horizontal direction (XX ′). At this time, in order to resonate with the microwave sensor, the resonating predetermined length L2 needs to be 1/2 ^{n of a} predetermined wavelength (n is an integer of 0 or more). As a result of the experiment, 24.15 GHz In this case, since it is known that it is about 4 mm, the predetermined resonating length L2 is configured to be about 4 mm.

FIG. 6B is a diagram illustrating a detection voltage when scanning the horizontal direction (X-X ′) with a microwave sensor (not illustrated) in FIG. 6A and reading it. As can be seen from this figure, the detection voltage in the resonance region 32 is at a level higher than the base 0V, and the detection voltage at a place other than the resonance region 32 is at a level 0V or lower than 0V at the base. It can be seen that the detection is performed at a high level by the predetermined length L2 provided in the 32 metal portions 32a. In this way, it is possible to confirm by reading using a sensor that determines authenticity of the information recording medium 30. In FIG. 6A, the horizontal direction (X-X ′) is exemplified, but the waveform shown in FIG. 6B is also obtained in the vertical direction (Y-Y ′). In order to obtain the waveform of FIG. 6B, if a predetermined length L2 that resonates with the metal portion 31a of the non-resonant region 31 is provided on the reading scan of the microwave sensor, a large waveform is obtained when reading. It will output. Therefore, when scanning the information recording medium 30 with a microwave sensor and reading information, the metal portion 32b of the resonance region 32 is provided with a predetermined length L2 that resonates, but the metal portion 31a of the non-resonance region 31 is provided with The predetermined length L2 that resonates is not provided.

(Example 2) After this example, the configuration of the geometric pattern composed of the line part 31b of the non-resonant region 31 and the line part 32b of the resonance region 32 and the arrangement of the line part 32b of the resonance region 32 are described. Although other configurations and machine reading methods are the same, only different configurations will be described.

FIG. 7 shows an information recording medium 30 according to an embodiment of the present invention, which is characterized by using a curved line. As shown in FIG. 7A, the non-resonant region 31 and the resonance region 32 are provided with metal portions 31a and 32a and line portions 31b and 32b, one of the line portions 31b being a curve, the other being a straight line, The part 32b is a straight line. Precisely, in the curve of the line part 31b, the circular line is expanded outward, and the straight lines of the line part 31b and the line part 32b are arranged radially from the center. When viewed, it becomes a geometric pattern. The line portions 31b and 32b are configured with a line width of 0.1 mm.

FIG. 7B is an enlarged view of the resonance region 32 and its periphery. The line portion 32b (horizontal line in the figure) in the resonance region 32 is a part of the geometric pattern together with the line portion 31b in the non-resonance region 31, and the conducting portion is arranged in the line portion 32b in the resonance region 32. To do. At this time, the length of the conducting portion (L1 shown in FIG. 3) is designed to be 0.1 mm, and the predetermined length L2 for resonance is designed to be 4 mm. According to this configuration, when read by a microwave sensor, a detection voltage as shown in FIG. 6B is obtained, and authenticity determination is possible.

(Example 3) FIG. 8 shows an information recording medium 30 according to an aspect of the present invention. As shown in FIG. 8A, the non-resonant region 31 and the resonant region 32 include metal portions 31a and 32a. Line portions 31b and 32b are provided, and the line portions 31b and 32b are formed by diagonal lines, and when viewed as the information recording medium 30, a lattice pattern is obtained. The line portions 31b and 32b have a line width of 0.1 mm and a line pitch of 2.0.

FIG. 8B is an enlarged view of the resonance region 32 and its periphery. Two line portions 32b (diagonal lines in the figure) in the resonance region 32 are part of the lattice pattern and are arranged so as not to contact the line portion 31b around the resonance region 32. At this time, the distance (L1 shown in FIG. 3) that does not contact is set to 0.1 mm, and the resonance length L2 is set to 4 mm. According to this configuration, the detection direction as shown in FIG. 6B is obtained in the reading direction by the microwave sensor, and authenticity determination is possible. Therefore, the resonance region 32 of the information recording medium 30 is provided in four places, top, bottom, left, and right.

When such an information recording medium 30 is visually recognized, since the distance where the line portion 32b of the resonance region 32 does not contact and the length of the conductive portion are short, only a simple geometric pattern can be recognized, and machine-readable information is given. It is difficult to recognize that it is.

It is a figure which shows the information recording medium and print sheet which show one embodiment of this invention. It is a fragmentary sectional view of the information recording medium which shows one embodiment of this invention. It is a figure which shows the line structure of the resonance area | region in the information recording medium concerning embodiment of this invention. It is a figure which shows the shape and line | wire structure of a resonance area | region in the information recording medium concerning embodiment of this invention. 1 is a diagram illustrating a configuration image of an information recording medium according to Embodiment 1. FIG. It is a figure which shows the authenticity determination method of the information recording medium concerning Example 1. FIG. FIG. 6 is a diagram illustrating a configuration image of an information recording medium according to a second embodiment. FIG. 10 is a diagram illustrating a configuration image of an information recording medium according to a third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Print sheet 1 'Securities printed matter 2 Base material 4 Adhesive layer 5 Hologram formation layer 6 Protective layer 7 Conductive part 10 Conductive layer 11 Nonconductive layer 30 Information recording medium 31 Resonant area 31a Metal part 31b Line part 32 Nonresonant area 32a Metal Part 32b Line part

Claims (7)

An information recording medium comprising a first pattern and a second pattern composed of a conductor attached region and a conductor non-attached region,
The first pattern is formed by arranging a plurality of patterns formed by surrounding a conductor adhering region with a conductor non-adhering region as unit patterns,
The second pattern is formed by a part of a portion constituting the first pattern, and is arranged at least two of the unit patterns and adjacent to each other in a certain direction, and a boundary between the adjacent portions The length of the longest portion from one end to the other end of the at least two unit patterns configured as described above is configured by providing a conductive portion in a part of the conductor non-adhering region. Has a conductor adhering region having a length of ½ ⁿ (n is an integer of 0 or more) of a wavelength that resonates at a predetermined frequency. 2. The information recording medium according to claim 1, wherein a length of the conductor adhesion region that resonates at the predetermined frequency is 4 mm. 3. The information recording medium according to claim 1, wherein the resonating predetermined length is not arranged on a machine reading scan in the first pattern conductor adhering region. 4. 4. The information according to claim 1, wherein a line width of the non-conductor-attached region surrounding the conductor-attached region is 0.05 to 0.15 mm. 5. recoding media. The length of the conduction | electrical_connection part provided in a part of conductor non-adhesion area | region in the said 2nd pattern is 0.05-0.15 mm, The any one of Claims 1 thru | or 4 characterized by the above-mentioned. The information recording medium described. The information recording medium according to any one of claims 1 to 5, wherein the information recording medium forms a lattice pattern by regularly providing unit patterns constituting the first pattern. A printed sheet comprising the information recording medium according to any one of claims 1 to 6 attached thereto.

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