JP2020194069A - Authentication medium and manufacturing method thereof - Google Patents

Abstract

To provide an authentication medium with higher security, easier to find an alteration when individual information is altered.SOLUTION: An authentication medium includes at least a laser coloring sheet 13 and a transparent surface sheet 11 laminated in this order on a core sheet 14. A hologram layer 12 with at least one hologram pattern formed is disposed between the laser coloring sheet and the transparent surface sheet. Individual information 1 is recorded by color development of the laser coloring sheet. The individual information is recorded in a recording area 5 with a prescribed hologram pattern 7 of the hologram layer set as a reference of a location. The recording area at least includes part of an area of the hologram layer. One of an area 3 of the at least one hologram pattern and an area having no hologram pattern inside the recording area serves as a non-recording part 6 where no individual information is to be recorded.SELECTED DRAWING: Figure 2

Description

The present invention relates to an authentication medium in which information is recorded by laser color development, and relates to an authentication medium in which it is difficult to falsify the recorded information and has high security, and a method for manufacturing the same.

In the authentication medium such as ID card and passport, the information recorded on the authentication medium is used to prove that the authentication medium is genuine, not forged or tampered with, and that the owner is a legitimate owner. It is necessary to collate the information possessed by the owner himself, and as the collated information, a method using biometric information such as a password, a face image, a fingerprint, a vein pattern, and an iris pattern is known.

Further, as an authentication medium, an IC medium equipped with an IC chip has been promoted in order to enhance the security of information, and it has become possible to record such information as electronic information on the authentication medium. By comparing and collating the face image taken directly of the person with the face image information stored in the IC, there are merits such as reliable authentication of the person and automation, for example, for immigration. It has been adopted. However, since it cannot be used without an information reading device or the like, many security devices such as holograms having an optical effect that can be visually confirmed are also adopted.

On the other hand, in the field of materials forming these certification media, the adoption of polycarbonate resin is widespread. Polycarbonate resin has excellent heat resistance and impact resistance, can be applied to a wide range of usage environments, has high transparency, and the information recorded when applied to a recording medium is highly clear and has good workability. It can also be suitably used as a base material for mounting an IC chip or an antenna by applying it to an IC card or the like. Furthermore, when a laser color-developing layer is provided and applied to laser recording, there are features such as less thermal deformation, good color-developing recording, and excellent visibility when a security medium such as a hologram is provided. , The use is widespread.

Therefore, a polycarbonate resin is provided by recording authentication information such as various biological information as described above on a recording medium as electronic information or visual information, and further providing a plurality of security media such as holograms in combination to improve security. Authentication media such as IC cards and passports used as base materials have come to be used.

For example, in Patent Document 1, a preprinted portion is provided in advance with a special ink on an article to which a hologram is transferred, and after the holograms are bonded together, the reflective layer of the hologram in the preprinted portion of the special ink is removed by laser irradiation. By writing individual information in the above and making the preprinted part of the base visible, it is said that an article that is difficult to counterfeit and has improved design can be obtained.

However, in the article as shown in FIG. 1 of Patent Document 1, when individual information data is written by laser irradiation, the preprinted portion is under the reflective thin film layer and cannot be seen. There is a problem that it is difficult to accurately align the position with the preprinted portion. Further, the article as shown in FIG. 2 has a problem that the original information and the falsified information cannot be distinguished when the individual information is further added by laser irradiation and falsified.

Further, in Patent Document 2, a transparent polycarbonate sheet is subjected to hologram processing on the surface, a polycarbonate sheet containing carbon black is laminated, and the polycarbonate sheet containing carbon black is irradiated with a YAG laser to develop a color. , It is said that it is possible to provide an ID card that can record individual information and is difficult to tamper with.

However, the ID card disclosed in Patent Document 2 is also similar in that it is not possible to distinguish between the original information and the falsified information when the individual information is further added by laser irradiation and falsified. ..

Japanese Unexamined Patent Publication No. 2005-119106 JP-A-2015-116767

In view of the above problems of the prior art, the present invention is provided with an optical device such as a hologram pattern such as an ID card, and individual information is falsified by adding laser irradiation to an article for recording individual information by laser irradiation. If this is the case, the challenge is to provide an authentication medium that is easy to detect tampering and has higher security.

In order to solve the above problems, the present invention
At least a laser coloring sheet and a transparent surface sheet are laminated in this order on the core sheet, and a hologram layer in which at least one hologram pattern is formed between the laser coloring sheet and the transparent surface sheet is provided. An authentication medium in which individual information is recorded by the color development of the laser color development sheet.
The individual information is recorded in a recording area set with a predetermined hologram pattern of the hologram layer as a reference for the position.
The recording area includes at least a part of the area of the hologram layer.
Provided is an authentication medium characterized in that at least one hologram pattern region or a region without a hologram pattern in the recording region is a non-recording unit on which the individual information is not recorded.

According to the above-mentioned authentication medium, the individual information recorded by developing the color of the laser coloring sheet is recorded at an accurate position with reference to the position of a predetermined hologram pattern, and even within the recording area, in the non-recording unit. Has the characteristic that individual information is missing because it is not recorded, and when the recorded individual information is tampered with by a method such as adding with a laser beam or scraping the laser coloring sheet, it is tampered with. If the positional relationship between the individual recordings made and the predetermined hologram pattern is misaligned, and if the non-recording portion is a minute area, it is difficult to understand that the recording is missing in that area, and it is difficult to reproduce the missing part. Since it is easy to detect that the information has been tampered with, it is possible to provide an authentication medium with high security.

Further, in the authentication medium, the predetermined hologram pattern that serves as a reference for the position of the individual information may be a diffraction grating. When a predetermined hologram pattern is used as a diffraction grating, the diffracted light is emitted at a specific angle with respect to the incident light, so that the position can be detected more accurately.

Further, in the authentication medium, the hologram layer may be provided with a plurality of types of hologram patterns having different optical effects. By providing a plurality of types of patterns, it is possible to separately provide patterns suitable for the purpose, such as a pattern suitable for using as a reference for position and a pattern suitable for detecting falsification.

Further, in the authentication medium, the laser coloring sheet and the transparent surface sheet may be laminated on both the front and back surfaces of the core sheet. This makes it possible to provide an authentication medium in which individual information is recorded on both sides.

Further, in the authentication medium, at least one of the core sheet, the laser coloring sheet, and the transparent surface sheet may be made of polycarbonate resin. By using a polycarbonate resin, it is possible to provide an authentication medium having high thermal stability, not being deformed by the heat of laser irradiation, and having better impact resistance, transparency, processability, and the like.

The present invention also optically detects the position of a predetermined hologram pattern on the authentication medium of the present invention, and irradiates a recording area with a laser beam based on the position of the predetermined hologram pattern to obtain a laser coloring sheet. Provided is a method for manufacturing an authentication medium, characterized in that individual information is recorded by developing a color and individual information is lost in a non-recording portion without irradiating a laser beam.

According to the above-mentioned manufacturing method of the authentication medium, the individual information recorded by developing the color of the laser coloring sheet can be recorded at an accurate position based on the position of a predetermined hologram pattern, and is within the recording area. However, in the non-recording section, individual information was not recorded, so recording could be performed in a missing manner, and the recorded individual information was tampered with by adding with laser light, scraping the laser coloring sheet, etc. At times, the positional relationship between the tampered individual recording and the predetermined hologram pattern is likely to be misaligned, and if the non-recording portion is a minute area, it is difficult to understand that the recording is missing in that area, and it is also missing. It is difficult to reproduce the information, and it is easy to find that it has been tampered with, and it is possible to manufacture a highly secure authentication medium.

According to the present invention, when recording individual information on an authentication medium, the position of the individual information is accurately aligned with a predetermined hologram, so that the individual information is added for falsification or the authentication medium is removed. When the individual information is rewritten, it is easy to find the positional deviation that occurs in the individual information of the laser color development layer with respect to the predetermined hologram, and it is possible to make the non-recording part difficult to reproduce by falsification, so that falsification can be easily found. can do.

It is sectional drawing of one form of the authentication medium of this invention. It is a schematic diagram of an example in which individual information is recorded in one form of the authentication medium of the present invention. It is a schematic diagram of the second example which recorded individual information in one form of the authentication medium of this invention. It is a schematic diagram of the third example which recorded individual information in one form of the authentication medium of this invention. It is a schematic diagram of the 4th example which recorded individual information in one form of the authentication medium of this invention. It is a schematic diagram of the fifth example in which individual information was recorded in one form of the authentication medium of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below.

FIG. 1 is a schematic cross-sectional view of a form of the authentication medium of the present invention. In the authentication medium 10 of the present embodiment, laser coloring sheets 13 and 15 capable of developing colors by irradiating laser light to write individual information and transparent surface sheets 11 and 16 for protecting the surfaces are laminated on both sides of the core sheet 14. A hologram layer 12 is provided between the laser coloring sheet 13 and the transparent surface sheet 11. In addition to this, the authentication medium 10 may include other layers as long as the function as an authentication medium is not impaired. For example, an inlay sheet including an IC chip and a communication antenna can be used, for example, a core sheet 14 and a laser coloring sheet 15. You may put it in between. Further, each of the above layers may be appropriately printed or may be provided with a known anti-counterfeiting function as long as the function as an authentication medium is not impaired. Further, if necessary, an adhesive layer may be provided.

The materials of the core sheet 14 and the laser coloring sheets 13 and 15 are not particularly limited as long as they have durability as an authentication medium, shape stability, processing suitability, etc., but if they are made of polycarbonate resin, they have impact resistance. It is more preferable because it has excellent heat resistance during laser light irradiation, can be applied to a wide range of usage environments, has high transparency, high clarity of recorded information, and good workability.

The transparent surface sheets 11 and 16 may be made of the same material as the core sheet 14 and the laser coloring sheets 13 and 15, but the laser beam irradiating the laser coloring sheets 13 and 15 is an infrared laser such as a YAG laser. In this case, it is preferable to use a resin that is not easily affected by laser light, for example, a polyethylene terephthalate resin. The entire surface of the transparent surface sheets 11 and 16 may be transparent, but a part of the transparent surface sheets 11 and 16 may be opaque as long as the writing of individual information on the laser coloring sheets 13 and 15 is not hindered.

The core sheet 14 may be transparent or opaque, but when laser coloring sheets are provided on both sides as in the example of FIG. 1, opaque is preferable because the coloring pattern of the laser coloring sheet is easy to see.

The laser coloring sheets 13 and 15 may be made of a resin containing a coloring agent or the like that absorbs laser light to develop color, but if it is made of a polycarbonate resin, the YAG laser, VYO ₄ may be used without using a coloring agent or the like. It absorbs an infrared laser such as a laser and develops color due to alteration of the sheet due to the heat.

The hologram layer 12 has at least a relief forming layer and a reflecting layer. The "hologram" referred to in the present specification is not limited to a hologram in a strict sense, but is generated by a relief forming layer having a fine structure formed on the surface such as reflection, diffraction, scattering, refraction, changing, and 3D display effect. It is a general term for those having an optical effect. The reflective layer may be a vapor-deposited layer of a metal such as aluminum, but if a transparent reflective film in which a metal oxide such as titanium oxide or zinc oxide is vapor-deposited is used, the color-developing pattern of the laser coloring sheet 13 is on the transparent surface sheet 11 side. It is more preferable because it can be seen through from. Further, it may be partially opaque by providing a metal vapor deposition layer.

The hologram layer 12 can be provided by a known method of thermal pressure transfer from what is considered to be a transfer foil. The hologram layer 12 may be provided over the entire surface of the authentication medium 10 or a part thereof, and the area, the width, the shape of the layer, and the like to be provided can be appropriately determined.

FIG. 2 is a schematic diagram of an example in which individual information is recorded in one form of the authentication medium of the present invention. The authentication medium is viewed in a plan view from the transparent surface sheet 11, and the transparent hologram pattern A2 and the transparent hologram pattern B3 of the hologram layer 12 are visible. The hologram pattern A2 and the hologram pattern B3 are preferably made easy to distinguish when magnified with a magnifying glass or the like. For example, the hologram pattern A2 may be a simple scattering structure or micro characters, and the hologram pattern B3 may be a hologram of a pattern. .. In the set recording area 5, a laser coloring unit 1 that develops color by irradiating a dot-shaped laser is formed. However, here, the portion of the hologram pattern B3 is a non-recording portion 6, and the laser coloring portion 1 is not formed and is missing in that portion.

As is clear from FIG. 1, the laser coloring sheet 13 is under the hologram layer 12, but since the hologram layer 12 is a transparent hologram, the laser coloring portion 1 can be visually recognized. The dot size of the laser coloring unit 1 is equivalent to the spot diameter of the laser beam, and is several tens of μm.
Since it can be made as minute as possible, the position of the laser coloring unit 1 can be set with high accuracy. Therefore, the size of the non-recording unit 6 can be made very small, which is difficult to see with the naked eye, difficult to tamper with, and easy to find even when tampered with.

As a method of forging or tampering with an authentication medium such as an ID card, the surface of the card is scraped and another hologram sheet or print sheet is embedded, and a laser is added to the face image (adding a beard, changing the hairstyle, etc.) to another person. However, in the authentication medium of the present invention, it is difficult to notice that the non-recording unit 6 having a minute size that is difficult to see with the naked eye is provided, and the non-recording unit 6 is provided with a magnifying glass or the like. It is possible to confirm whether or not forgery or falsification has been performed by confirming the presence or absence of the laser and its position.

The position of the recording region 5 can be adjusted with high accuracy by detecting the diffracted light from the alignment mark 7 composed of the diffraction grating provided in the hologram layer using a known optical sensor. Instead of providing the alignment mark 7, the characteristic portion of the hologram pattern A2 or the hologram pattern B3 can be similarly detected and used as a reference for the position.

FIG. 3 is a schematic diagram of a second example in which individual information is recorded in one form of the authentication medium of the present invention. Similar to the above example, the authentication medium is viewed in a plan view from the transparent surface sheet 11, and the transparent hologram pattern B3 of the hologram layer and the region 4 without the hologram are visible. The hologram pattern B3 is a hologram of the pattern. In the set recording area 5, a laser coloring unit 1 that develops color by irradiating a dot-shaped laser is formed. However, here, the laser coloring portion 1 is formed in the region 4 without the hologram, the portion of the hologram pattern B3 is regarded as the non-recording portion 6, and the laser coloring portion 1 is missing in that portion without being formed. Since the region 4 without the hologram can be a single color such as white, the laser coloring unit 1 can be easily visually recognized. In this example, although not particularly shown, a characteristic portion of the hologram pattern B3 is detected and used as a position reference, and the laser coloring unit 1 can set the position with high accuracy and is difficult to tamper with, and tampering is found. It is easy as in the above example.

FIG. 4 is a schematic view of a third example in which individual information is recorded in one form of the authentication medium of the present invention. Similar to the above example, the authentication medium is viewed in a plan view from the transparent surface sheet 11, and the transparent hologram pattern A2 and the transparent hologram pattern B3 of the hologram layer 12 are visible. In this example, the hologram pattern A2 is a simple scattering structure, and the hologram pattern B3 is a hologram of a pattern. In the set recording area 5, a laser coloring unit 1 that develops color by irradiating a dot-shaped laser is formed. However, here, the portion of the hologram pattern A2 is the non-recording portion 6, and the laser coloring portion 1 is not formed and is missing in that portion.

If the hologram layer 12 is a transparent hologram, the laser coloring unit 1 can be visually recognized even if the hologram pattern B3 is a hologram of a pattern. It is the same as the above-mentioned example that the laser color-developing unit 1 can set the position with high accuracy, is difficult to tamper with, and is easy to detect tampering.

FIG. 5 is a schematic view of a fourth example in which individual information is recorded in one form of the authentication medium of the present invention. Similar to the above example, the authentication medium is viewed in a plan view from the transparent surface sheet 11, and the transparent hologram pattern A2 and the transparent hologram pattern B3 of the hologram layer are visible. In this example, the hologram pattern A2 is a micro character and the hologram pattern B3 is a hologram of a pattern. In the set recording area 5, a laser coloring unit 1 that develops color by irradiating a dot-shaped laser is formed. However, here, the portion of the hologram pattern A2 is the non-recording portion 6, and the laser coloring portion 1 is not formed and is missing in that portion.

Since the micro characters of the hologram pattern A2 have no optical effect in normal visual observation, they do not affect the appearance of the hologram of the pattern of the hologram pattern B3, which is preferable. On the other hand, if a magnifying glass or the like is used, the micro characters can be easily identified, and the non-recording unit 6 can easily find them. Therefore, it is the same as the above-mentioned example that the laser coloring unit 1 can set the position with high accuracy, is difficult to tamper with, and is easy to detect tampering.

FIG. 6 is a schematic diagram of a fifth example in which individual information is recorded in one form of the authentication medium of the present invention. Similar to the above example, the authentication medium is viewed in a plan view from the transparent surface sheet 11, and the transparent hologram pattern B3 of the hologram layer and the region 4 without the hologram are visible. The hologram pattern B3 is a hologram of the pattern. In the set recording area 5, a laser coloring unit 1 that develops color by irradiating a dot-shaped laser is formed. However, here, the laser coloring portion 1 is formed in the hologram pattern B3, the portion of the region 4 without the hologram is regarded as the non-recording portion 6, and the laser coloring portion 1 is not formed and is missing in that portion. If the hologram layer 12 is a transparent hologram, the laser coloring unit 1 can be visually recognized even if the hologram pattern B3 is a hologram of a pattern. In this example, although not particularly shown, a characteristic portion of the hologram pattern B3 is detected and used as a position reference, and the laser coloring unit 1 can set the position with high accuracy and is difficult to tamper with, and tampering is found. It is easy as in the above example.

As described above, according to the present invention, falsification of individual information recorded by laser color development can be easily found, and an authentication medium with high security can be provided.

1 ... Laser color development part 2 ... Hologram pattern A
3 ... Hologram pattern B
4 ... Area without hologram pattern 5 ... Recording area 6 ... Non-recording unit 7 ... Alignment mark (diffraction grating)
10 ... Authentication medium 11, 16 ... Transparent surface sheet 12 ... Hologram layer 13, 15 ... Laser coloring sheet 14 ... Core sheet

Claims (6)

At least a laser coloring sheet and a transparent surface sheet are laminated in this order on the core sheet, and a hologram layer in which at least one hologram pattern is formed between the laser coloring sheet and the transparent surface sheet is provided. An authentication medium in which individual information is recorded by the color development of the laser color development sheet.
The individual information is recorded in a recording area set with a predetermined hologram pattern of the hologram layer as a reference for the position.
The recording area includes at least a part of the area of the hologram layer.
An authentication medium characterized in that at least one hologram pattern area or a non-hologram pattern area in the recording area is a non-recording unit on which the individual information is not recorded. The authentication medium according to claim 1, wherein a predetermined hologram pattern that serves as a reference for the position of the individual information is a diffraction grating. The authentication medium according to claim 1 or 2, wherein the hologram layer is provided with a plurality of types of hologram patterns having different optical effects. The authentication medium according to any one of claims 1 to 3, wherein the laser color-developing sheet and the transparent surface sheet are laminated on both the front and back surfaces of the core sheet. The authentication medium according to any one of claims 1 to 4, wherein at least one of the core sheet, the laser coloring sheet, and the transparent surface sheet is made of a polycarbonate resin. The position of a predetermined hologram pattern of the authentication medium according to any one of claims 1 to 5 is optically detected, and the recording area is irradiated with laser light based on the position of the predetermined hologram pattern to develop laser color. A method for manufacturing an authentication medium, characterized in that a sheet is colored to record individual information, and individual information is lost in a non-recording portion without irradiating a laser beam.

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