JP2009075787A - Information recording medium and its patch - 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 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, makes it difficult to be recognized that the information is added, and enables to perform the authenticity determination by providing a conductive portion on 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 an attached material thereof. 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.

Conventionally, as a measure to prevent counterfeiting and alteration of printed matter such as banknotes and stock certificates, various certificates and valuable documents, mainly designs with designs such as metal foil attached to the printed matter and a lot of geometric patterns There is a method to use.

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 In addition, improvement in microfabrication technology has led to the production of metal foils with reproducibility that cannot be distinguished at first glance.

In the inspection of printed matter having a diffraction grating, 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 repeated pattern of the security thread is compared with the pattern of the authentic printed matter to determine the authenticity ( For example, see Patent Document 1.)

This technique is to detect whether the previous security thread simply has a security thread, or whether there are characters on the security thread, i.e. partially removed. On the other hand, paying attention to the fact that the security thread, which has gone one step further and removed the metal film partially with a repeating pattern, generates a waveform pattern of a certain microwave detection voltage, the waveform pattern of the microwave detection voltage is Compared with this, the authenticity is discriminated.

In addition, a part of the metal vapor deposition layer or a part of the metal layer and the heat-sensitive adhesive layer formed in advance is removed by laser processing into a slit shape or a mesh shape, and the region including the removed portion is simulated transparent or semi-transparent. A metal contact type thermal transfer hologram sheet in which a pseudo-transparent hologram is transparently 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 take into account the design properties such as the design of printed matter, and can take measures to prevent forgery and alteration, making the same pattern in the forgery difficult by making the pattern complicated. .

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. However, it has become an important design as a design that generally gives an impression of luxury. Therefore, in the printed matter such as securities such as banknotes and stock certificates, various certificates and important documents, the background pattern / color pattern, relief pattern, etc. 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 in a repetitive pattern is configured to generate a waveform pattern of a constant microwave detection voltage. Since it is configured by the presence of two types of regions that do not exist, only a change in analog voltage based on the presence or absence of conductivity can be obtained from the detected voltage waveform. For this reason, it has been difficult to accurately determine the authenticity even if an operation is performed based on the 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 metal vapor deposition-type thermal transfer hologram sheet has been subjected to the removal process is seen through the back, and functions as a pseudo transparent sheet. 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 poor 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 is an information recording medium composed of a conductor-attached area and a conductor non-attached area, and the conductor-attached area has a predetermined line width and is displayed in an arbitrary pattern. Overlapping the metallized conductor non-adhering region, forming a plurality of non-demetalized conductor adhering regions surrounded by the conductor non-adhering region, camouflaging the machine reading region, and An object of the present invention is to provide an information recording medium capable of authenticating with high accuracy and a sticker thereof.

The invention according to claim 1 of the present invention is an information having a plurality of conductor adhesion regions surrounded by a conductor non-adhesion region by superimposing a line-shaped conductor non-adhesion region on the conductor adhesion region. In the recording medium, a conductor attachment region having a length of ½ ⁿ (n is an integer of 0 or more) of a wavelength at which the length of the longest side resonates at a predetermined frequency among the plurality of conductor attachment regions. It is an information recording medium having at least one.

The invention according to claim 2 of the present invention has a first collective pattern formed by repeating a pattern in which a conductor-like non-adhered region is superimposed on a conductor adhering region. And a second aggregate pattern formed by repeating a pattern that overlaps a different line-shaped conductor non-adhesion region, and the first aggregate pattern and the second aggregate pattern are adjacent or surrounded The first collective pattern and the second collective pattern arranged so as to be adjacent to or surrounding each other are composed of a portion having a contact and a portion not having a contact, and the first set of portions having no contact A conductor whose length of the longest side of the conductor adhering region surrounded by the pattern and the second aggregate pattern is 1/2 ⁿ (n is an integer of 0 or more) of the wavelength that resonates at a predetermined frequency. It is an information recording medium having at least one attached region.

The invention according to claim 3 of the present invention is an information recording medium in which the length of the longest side of the resonating conductor adhesion region is 4 mm.

In the invention according to claim 4 of the present invention, information that does not place a predetermined length to resonate on the machine reading scan other than the conductor adhesion region surrounded by the first aggregate pattern and the second aggregate pattern. It is a recording medium.

The invention according to claim 5 of the present invention is the information recording medium in which the line width of the image-like conductor non-adhering region is 0.05 to 0.15 mm. It is characterized by

The invention according to claim 6 of the present invention is an information recording medium in which a ground pattern or a colored pattern is formed by superimposing an image-like conductor non-adhering region on a conductor adhering region. .

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

According to the present invention, there is provided an information recording medium comprising a conductor adhesion region and a conductor non-adhesion region, and the conductor non-adhesion that is demetalized into an arbitrary pattern with a fixed line width in the conductor adhesion region. Overlapping and forming a plurality of non-demetalized conductor adhesion regions surrounded by the conductor non-adhesion region, camouflaging of the machine reading area can be performed and true / false discrimination can be performed with high accuracy. It has become possible.

Hereinafter, an example of an embodiment of the information recording medium of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the present invention. The printing sheet 1 according to the embodiment is formed by sticking an information recording medium 30 to paper or the like that is a 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 taken along line aa ′ of FIG. 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 layer 7 and a portion of only the hologram forming layer 5 by demetalizing the conductive layer 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. However, a hologram having a diffraction grating is desirable. In addition, a known technique may be used as a demetalizing method, for example, a method of immersing in an alkaline solution to partially dissolve a metal, a method using a laser irradiation apparatus, or the like. The conductive part 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. As shown in FIG. 3A, the information recording medium 30 has two types of geometric patterns 31 and 32 formed adjacent to each other. The geometric pattern 31 includes a metal portion 31a and a line portion 31b, and the geometric pattern 32 includes a metal portion 32a and a line portion 32b. At this time, the metal parts 31a and 32a are composed of the conductive layer 10 including the conductive part 7 shown in FIG. 2, and the conductive part 7 is formed of a metal such as aluminum, copper, nickel, or tin. On the other hand, the line portions 31b and 32b are the non-conductive layer 11 that does not include the conductive portion 7 shown in FIG. 2, and specifically, the conductive portion 7 is demetallized in an arbitrary line shape (or image line) (metal As a line aggregate, an arbitrary geometric pattern is obtained.

FIG. 3B is a diagram schematically showing a region 31 ′ for forming the first geometric pattern 31 and a region 32 ′ for forming the second geometric pattern 32 in the information recording medium 30. is there. The region 31 ′ is a region surrounded by the line portion 31 b of the geometric pattern 31, the region 32 ′ is a region surrounded by the line portion 32 b of the geometric pattern 32, and the two regions are machine regions. Therefore, the non-resonant region 33 is formed. On the other hand, a part of the region other than the non-resonant region 33 is designed to function as the resonance region 34. Specifically, the resonance region 34 does not resonate unless there is a predetermined length L1 that resonates with the frequency in the direction perpendicular to the reading direction (X-X ′) when read by the machine. Therefore, the resonance region 34 is surrounded by the line portion 31b and the line portion 32b and needs a predetermined length L1 that resonates with the frequency. As shown in FIG. 3B, regions other than the region 31 ′, the region 32 ′, and the resonance region 34 (regions arranged above and below the resonance region 34 in the figure) are on the scanning at the time of machine reading. Since there is no influence on machine reading, it may or may not have a predetermined length L1 that resonates with the metal part. The resonance region 34 is composed of the conductive layer 10 including the conductive portion 7 shown in FIG. 2, and has the same configuration as the metal portion 31a and the metal portion 32a.

Further, as a feature of the embodiment, by disposing the resonance region 34 between the first geometric pattern 31 and the second geometric pattern 32 which are the non-resonance regions 33, the mechanical reading element is noticed. It can be recognized only as a design and decorative pattern. In addition, the geometric patterns 31 and 32 are arbitrary, but considering the design surface, the pattern may be constituted by a set of curved lines having a fixed line width such as a background pattern / color pattern, relief pattern, etc. Although it is desirable, there is no particular limitation, and a lattice pattern regularly composed of quadrilaterals or a geometric pattern combining triangles, squares, rhombuses, polygons, circles, etc. may be used.

Moreover, when the line width of the line part 31b and the line part 32b is comprised between 0.01 and 0.20 mm, preferably between 0.05 and 0.15 mm, the line part itself becomes fine and the forgery prevention effect is improved.

Next, machine reading of the information recording medium 30 will be described with reference to FIG. The resonance region 34 requires a metal portion having a predetermined length L1 that resonates with a frequency during machine reading. The width of the predetermined length L1 that resonates, specifically, the length L2 is arbitrary in FIG. As a specific machine reading method, an electromagnetic wave having a resonance frequency is re-radiated when the information recording medium 30 is irradiated with the electromagnetic wave in the direction of the arrow shown in the figure. For example, when measured by a microwave sensor, the metal portion of the resonance region 34 has a predetermined length L1 that resonates at a predetermined frequency, and the predetermined length L1 that resonates is ½ ⁿ (n Is an integer greater than or equal to 0), resonance is obtained when a large current flows along the length direction (vertical direction in the drawing), and authenticity determination is possible. Therefore, the predetermined length L1 to resonate is substantially perpendicular to the reading direction of the detector such as the microwave sensor and from the end of the metal part of the resonance region 34, as shown in FIG. The length to the other end may be a length L1 of ½ ⁿ of the wavelength that resonates at a predetermined frequency. As a reading method using a machine, Japanese Patent Application No. 2006-26652 filed earlier by the same applicant may be used.

When the resonance region 34 of the information recording medium 30 is scanned by a machine, the metal portion 31a and the metal portion 32a of the non-resonance region 33 positioned on the scan have a predetermined length that resonates in the direction perpendicular to the scanning direction. It is desirable not to arrange L1. The reason is that the same detection value as that in the resonance region 34 is detected in the non-resonance region 33, and authenticity determination cannot be easily performed. In the first embodiment and the second embodiment, the configuration is described in which the line portion is not disposed in the resonance region 34. However, if the predetermined length L1 that resonates is not obstructed, the resonance region 34 may be disposed within the resonance region 34. A line portion may be provided.

Example 1 FIG. 4 shows an information recording medium 30 according to one embodiment of the present invention, and is an example in which a geometric pattern is provided over substantially the entire area of the information recording medium 30. FIG. 4A is a plan view of the information recording medium 30, and a geometric pattern 31 and a geometric pattern 32 are provided in the elliptical information recording medium 30. Further, the geometric pattern 31 forms a striated pattern by a line portion 31b obtained by radially demetalizing the metal portion 31a from the center of the information recording medium 30. On the other hand, the geometric pattern 32 forms a striated pattern along the contour of the information recording medium 30 by a line portion 32b obtained by demetalizing the metal portion 32a. At this time, the line width of the line part 31b and the line part 32b is 0.12 mm.

FIG. 4B schematically shows the region 31 ′ of the geometric pattern 31, the region 32 ′ of the geometric pattern 32, and the resonance region 34. The region 31 ′ is a region surrounded by the line portion 31 b, the region 32 ′ is a region surrounded by the line portion 32 b, and the region 31 ′ and the region 32 ′ become the non-resonant region 33. On the other hand, the region surrounded by the line portion 31b of the region 31 'and the line portion 32b of the region 32' and having a predetermined resonance length L1 is the resonance region 34. In this embodiment, four places are provided.

FIG. 4C is an enlarged view of the resonance region 34 disposed in the upper part of FIG. This is an example of mechanically arranged for the purpose of reading in the vertical direction (Y-Y '). The resonance region 34 is a metal portion of a region surrounded by the line portion 31b of the geometric pattern 31 and the line portion 32b of the geometric pattern 32, and has a predetermined length that resonates perpendicularly to the reading direction. L1 is provided.

FIG. 4D is an enlarged view of the resonance region 34 arranged in the right part of FIG. This is an example of mechanically arranged for the purpose of reading in the lateral direction (X-X '). The resonance region 34 is a metal portion of a region surrounded by the line portion 31b of the geometric pattern 31 and the line portion 32b of the geometric pattern 32, and has a predetermined length that resonates perpendicularly to the reading direction. L1 is provided.

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. 5 illustrates an example of the case where the printed securities 1 'to which the information recording medium 30 is pasted and the authenticity is determined by machine reading. 5A, on the information recording medium 30 of the securities printed matter 1 ′, more precisely, on the metal part of the resonance region 34, within a predetermined length L1 that resonates and in a direction substantially orthogonal to the resonance portion 34. Scan and measure the microwave sensor. Therefore, in the information recording medium 30 shown in FIG. 4A, the resonance regions 34 are arranged at four locations in the upper, lower, left and right directions, but the two left and right locations are in the horizontal direction (XX ′), and the two upper and lower locations are in the vertical direction. It can be read in the direction (YY ′). In this embodiment, four resonance regions are provided in order to enable reading in any of the vertical and horizontal directions, but there is no restriction and one resonance region may be used.

FIG. 5A 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). Since the resonance length is about 4 mm when the frequency is 24.15 GHz, the predetermined resonance length L1 is about 4 mm.

FIG. 5B is a diagram illustrating a detected voltage when the horizontal sensor (X-X ′) is scanned and read with the microwave sensor (not illustrated) in FIG. As can be seen from this figure, the detection voltage in the resonance region 32 is at a level higher than 0 V of the base, and the detection voltage at a place other than the resonance region 32 is at a level of 0 V or lower than 0 V at the base. It can be seen that the detection is performed at a high level by the predetermined length L1 provided in the metal portion of the region 34. In this way, it is possible to confirm by reading using a sensor that determines authenticity of the information recording medium 30. In FIG. 5A, the horizontal direction (X-X ′) is illustrated, but the waveform shown in FIG. 5B is also obtained in the vertical direction (Y-Y ′).

(Embodiment 2) In Embodiment 2, the configuration of the second geometric pattern 32 is different from that of Embodiment 1, but the other configurations and the machine reading method are the same, so only the different configurations will be described.

FIG. 6 shows an information recording medium 30 according to an embodiment of the present invention. In Example 1, a line portion 31b of a geometric pattern 31 and a line portion 32b of a geometric pattern 32 are formed in succession. Has a configuration in which a region having no contact, that is, a space region (metal portion) surrounded by the line portion 31b and the line portion 32b is a resonance region. In the second embodiment, the line portion 31b of the geometric pattern 31 and the line portion 32b of the geometric pattern 32 are configured to have a contact point, and the continuous line of the line portion 32b of the geometric pattern 32 is formed. A part of the inner region of the line portion 32b has a cut shape, and a space region (metal portion) surrounded by the partially cut region portion of the line portion 32b and the line portion 31b of the geometric pattern 31 resonates. It is characterized by being an area. FIG. 6A is a plan view of the information recording medium 30, and a geometric pattern 31 and a geometric pattern 32 are provided in the elliptical information recording medium 30. Further, the geometric pattern 31 forms a chromatic pattern by a line portion 31b obtained by radially demetalizing the metal portion 31a from the center of the information recording medium 30. On the other hand, in the geometric pattern 32, along the contour of the geometric pattern 32, a colored pattern is continuously formed by a line portion 32b obtained by demetalizing the metal portion 32a. At this time, the line width of the line part 31b and the line part 32b is 0.12 mm.

6 (b), FIG. 6 (c) and FIG. 6 (d) correspond to FIG. 4 (b), FIG. 4 (c) and FIG. 4 (d) of the first embodiment. Since it is the same as that of Example 1, description is abbreviate | omitted. On the other hand, in the machine reading, the same effect is obtained by the method shown in FIG.

When such an information recording medium 30 is visually recognized, it can be recognized as a geometric pattern, but it is difficult to recognize that machine read information is given.

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 plane enlarged view of the information recording medium of the present invention, and is a diagram showing the configuration of a resonance region and a non-resonance region. 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.

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
DESCRIPTION OF SYMBOLS 11 Non-conductive layer 30 Information recording medium 31 Geometric pattern 31a Metal part 31b Line part 32 Geometric pattern 32a Metal part 32b Line part 33 Non-resonant area 34 Resonant area

Claims (7)

An information recording medium having a plurality of the conductor adhesion regions surrounded by the conductor non-adhesion region by superimposing a line-shaped conductor non-adhesion region on the conductor adhesion region, Among the conductive material adhesion regions, it has at least one conductive material adhesion region having a length of ½ ⁿ (n is an integer of 0 or more) of a wavelength whose longest side resonates at a predetermined frequency. To record information. The conductor adhering region has a first aggregate pattern formed by repeating a pattern that overlaps the line-shaped conductor non-adhering region, and is different from the first aggregate pattern. It has a second aggregate pattern formed by repeating a pattern that overlaps the adhesion area, and the first aggregate pattern and the second aggregate pattern are arranged adjacent to or enclose, and the adjacent or enclose The first collective pattern and the second collective pattern arranged in such a manner are composed of a portion having a contact and a portion not having the contact, and the first collective pattern of the portion not having the contact and the The length of the longest side of the conductor adhering region surrounded by the second aggregate pattern is 1/2 ⁿ (n is an integer of 0 or more) of the wavelength that resonates at a predetermined frequency. An information recording medium having at least one area. 3. The information recording medium according to claim 1, wherein the length of the longest side of the resonating conductor adhering region is 4 mm. 2. The predetermined length that resonates is not arranged on a machine reading scan except for the conductor adhesion region surrounded by the first aggregate pattern and the second aggregate pattern. Or the information recording medium of 3. 5. The information recording medium according to claim 1, wherein a line width of the image-like conductor non-adhering region is 0.05 to 0.15 mm. The information according to claim 1, wherein a ground pattern or a chromatic pattern is formed by superimposing the image-like conductor non-adhering region on the conductor adhering region. recoding media. A printed sheet comprising the information recording medium according to any one of claims 1 to 6 attached thereto.

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