WO2012176301A1

WO2012176301A1 - Antenna sheet, brochure body with ic attached, and ic card

Info

Publication number: WO2012176301A1
Application number: PCT/JP2011/064395
Authority: WO
Inventors: 水口　義之; 志帆赤澤
Original assignee: 凸版印刷株式会社
Priority date: 2011-06-23
Filing date: 2011-06-23
Publication date: 2012-12-27

Abstract

An antenna sheet comprises: an antenna substrate, further comprising a first surface and a second surface which is opposite from the first surface; an antenna which is formed on the first surface of the antenna substrate; an IC module which is connected to the antenna; a function layer which is formed on the first surface of the antenna substrate with the same material as the antenna; an upper exterior substrate which is opposite from the first surface of the antenna substrate; and a lower exterior substrate which is opposite from the second surface of the antenna substrate. One of the upper exterior substrate or the lower exterior substrate has opacity except for a region which corresponds to a portion of the antenna and either all or part of the function layer. The other of the upper exterior substrate or the lower exterior substrate has partial or total opacity.

Description

Antenna sheet, booklet with IC, and IC card

The present invention relates to an antenna sheet used for a non-contact IC medium, an IC booklet using the antenna sheet, and an IC card. In particular, the present invention relates to an IC booklet and an IC card that require high security such as a passport and an ID card.

Conventionally, a non-contact IC card, an electronic passport capable of non-contact data communication, and the like have a configuration in which an inlet having an IC chip and an antenna is sandwiched between sheets such as an exterior base material. Since the inlet is concealed by a sheet such as an exterior base material or a printing layer provided there, the inlet cannot be visually recognized from the outside.
There has also been a technique for preventing counterfeiting such as illegally replacing an inlet by using a transparent exterior base material to intentionally expose a module or inlet so that the module or inlet can be visually recognized (Patent Document 1). Patent Document 1 also discloses a technique for forming a part of an antenna so as to express predetermined information and be visible from the outside.

In the above-described method, the visible portion is an antenna, an IC chip, or the like. An antenna that can be visually recognized from the outside can be easily imitated because it can be seen how to form the antenna, the antenna design such as the number of turns and size, and the connection with the module. If the IC chip can also be visually recognized, the same one can be easily prepared. Further, since the portion of the antenna that expresses the predetermined information can be visually recognized, there is a risk that an antenna having the same shape can be easily formed and replaced with a counterfeit product.
As described above, a simple pattern or an easily available pattern is likely to be dead copied if it can be visually recognized from the outside. Therefore, when the information, encryption, etc. inside the IC are read, there is a risk that the completely same information is manufactured and the security is lowered.

Also, in terms of preventing unauthorized use of non-contact IC media, a method of performing security processing such as hologram sealing on the surface of non-contact IC media is also known. However, in this method, for example, there is a risk of unauthorized use by removing the hologram seal, replacing the inlet contained in the non-contact IC medium, and pasting the removed hologram seal again.

Japanese Unexamined Patent Publication No. 07-276870

In view of the above problems, an object of the present invention is to provide an antenna sheet that has high security and is difficult to forge an inlet having an IC chip and an antenna, and a non-contact IC medium using the antenna sheet. .

An antenna sheet according to an aspect of the present invention includes: an antenna substrate having a first surface and a second surface opposite to the first surface; an antenna formed on the first surface of the antenna substrate; An IC module connected to the antenna substrate; a functional layer formed of the same material as the antenna on the first surface of the antenna substrate; an upper exterior substrate facing the first surface of the antenna substrate; A lower exterior substrate facing the second surface of the substrate, and one of the upper exterior substrate and the lower exterior substrate corresponds to part of the antenna and part or all of the functional layer. Except for the region, it has concealability, and all or part of the other of the upper exterior substrate and the lower exterior substrate has concealability.

In the antenna sheet, the functional layer includes a fine character having a size of 2 mm × 2 mm or less, a micro character, a fine image having a line width of 10 μm to 500 μm, a metal reflective layer having a diffraction structure, a latent image, and a latent image. It may include at least one of verification filters that reveal the image.

In the antenna sheet, the upper exterior base material has a transparent base material and a concealable print layer, and the concealable print layer corresponds to a part of the antenna and a part or all of the functional layer. It may be formed in a region excluding.

In the antenna sheet, the antenna and the functional layer may be formed of a metal thin film, a conductive printed layer, or metal plating.

The booklet with an IC according to another aspect of the present invention includes: a cover material; a book paper having a plurality of book paper pieces; incorporated into the book paper as one of the plurality of book paper pieces; An antenna sheet having a first surface, and an antenna substrate having a first surface and a second surface opposite to the first surface; and formed on the first surface of the antenna substrate. An antenna; an IC module connected to the antenna; a functional layer formed of the same material as the antenna on the first surface of the antenna base; and an upper exterior base facing the first surface of the antenna base A lower exterior substrate facing the second surface of the antenna substrate, and one of the upper exterior substrate and the lower exterior substrate is part of the antenna and part of the functional layer. Or the area corresponding to all It can have a hiding property, the other of all or part of the upper outer substrate and the lower exterior base having a hiding property.

In the above-mentioned booklet with IC, the functional layer includes a fine character having a character size of 2 mm × 2 mm or less, a micro character, a fine image having a line width of 1 mm or less, a metal reflection layer having a diffraction structure, and a latent image. It may include at least one of the manifestation verification filters.

In the booklet with IC, the upper exterior base material has a transparent base material and a concealing print layer, and the concealment print layer is a region excluding a region corresponding to a part of the antenna and the functional layer. It may be formed.

In the booklet with IC, the antenna and the functional layer may be formed of a metal thin film, a conductive printed layer, or metal plating.

In the booklet with IC, the antenna sheet is incorporated in one of the plurality of paper sheets, and the functional layer is a verification filter or a polarizer that reveals a latent image, and the plurality of paper sheets The paper sheet adjacent to the lower exterior substrate of the antenna sheet has at least one of a print latent image and a polarization latent image, and the lower exterior substrate of the antenna sheet is the lower exterior substrate. You may have concealment property except the area | region corresponding to at least one of the said printing latent image and polarized light latent image which were formed in the adjacent paper sheet piece.

In the above-mentioned booklet with IC, the lower exterior base material has a transparent base material and a concealing print layer, and the concealment print layer is formed on the adjacent paper sheet pieces. It may be formed on the entire surface except for a region corresponding to at least one of them.

In the booklet with IC, the antenna sheet is incorporated into one of the plurality of paper sheets so that the antenna sheet is adjacent to the cover material, and the cover material corresponds to a functional layer formed on the antenna sheet. You may have an opening in the field to do.
An IC card according to another aspect of the present invention includes the antenna sheet.

According to the aspect of the present invention, since the antenna and the functional layer are inseparably formed, the antenna sheet cannot be exchanged by separating the functional layer, so that the antenna sheet having high security can be obtained.

It is the schematic which shows the antenna sheet which concerns on one Embodiment of this invention. It is the schematic which shows the antenna sheet which concerns on other embodiment of this invention. It is the schematic which shows the antenna sheet which concerns on other embodiment of this invention. FIG. 1B is a cross-sectional explanatory view showing a cross section along the line A-A ′ of the antenna sheet of FIG. 1A. It is a section explanatory view showing the section of the antenna sheet concerning other embodiments of the present invention. It is a section explanatory view showing the section of the antenna sheet concerning other embodiments of the present invention. It is the schematic which shows the antenna sheet which concerns on other embodiment of this invention. FIG. 6 is a cross-sectional explanatory view showing a cross section taken along line BB ′ of the antenna sheet of FIG. It is the schematic which shows the antenna sheet and booklet which concern on other embodiment of this invention. It is sectional explanatory drawing which shows the cross section of the booklet which concerns on other embodiment of this invention. It is sectional explanatory drawing which shows the cross section of the booklet which concerns on other embodiment of this invention. It is sectional explanatory drawing which shows the cross section of the booklet which concerns on other embodiment of this invention. It is sectional explanatory drawing which shows the cross section of the booklet which concerns on other embodiment of this invention. It is sectional explanatory drawing which shows the cross section of the booklet which concerns on other embodiment of this invention. It is the schematic which shows the dual type IC card using the antenna sheet which concerns on one Embodiment of this invention.

The antenna sheet according to the present invention includes an antenna substrate, an antenna formed on the antenna sheet, an IC module connected to the antenna, and upper and lower surfaces (first surface and second surface) of the antenna substrate. And an exterior base material arranged to face each other. A functional layer made of the same material as the antenna is provided on the same surface (first surface) as the surface of the antenna substrate on which the antenna is formed. One of the upper exterior substrate and the lower exterior substrate has transparency in a region including the functional layer and a part of the antenna, and has concealability in other regions. Therefore, a part of the functional layer and the antenna can be visually recognized from above and / or below the antenna sheet.
According to the antenna sheet, since it is difficult to forge a functional layer having high security, it is possible to prevent forgery of the antenna sheet itself. Further, since the antenna and the functional layer are inseparable, it is impossible to exchange only the antenna and the IC without exchanging the functional layer.
Even if only the antenna and the IC are removed and replaced with the functional layer, the functional layer and the antenna can be visually recognized from the outside of the antenna sheet, so that it is easily understood that only the antenna and the IC have been replaced. For this reason, forgery can be prevented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1A is a schematic explanatory view showing an antenna sheet 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional explanatory view of the antenna sheet 100 of FIG. 1A.
The antenna sheet 100 of the present embodiment includes an antenna substrate 1 having a first surface 1a and a second surface 1b opposite to the first surface 1a, and an antenna formed on the first surface 1a of the antenna substrate 1. 2, an IC module 3 connected to the antenna 2, and a functional layer 4 formed on the same first surface 1 a as the surface of the antenna base 1 on which the antenna 2 is formed.

As the antenna substrate 1, a polyester film substrate such as polyethylene terephthalate (PET), a polyimide substrate, an acrylic substrate, or a vinyl chloride substrate can be used.
In addition, a hard base material using engineering plastics such as polycarbonate can be used as the antenna base material 1.
Further, a paper base material may be used as the antenna base material 1.
Further, a base material capable of laser printing may be used. As such a substrate, a sheet for laser marking mainly composed of polycarbonate can be used.
Although it does not specifically limit as a paper base material, For example, the hard paper base material using the compression fixation paper can be used. Specifically, a hard paper base material in which a plurality of vulcanized fibers made of natural cellulose as a raw material are laminated is exemplified.
The antenna substrate 1 may have a thickness of about 25 to 100 μm.

The antenna 2 can be formed by an etching method, a plating method, a printing method, or a pattern vapor deposition method. These methods can be formed simultaneously with the functional layer 4 as will be described later.
According to the etching method, a metal foil such as aluminum or copper is laminated on the antenna substrate 1 or a metal thin film such as aluminum or copper is formed on the antenna substrate 1 by vapor deposition or sputtering. A mask pattern is formed on the metal foil / metal thin film, and an antenna-shaped pattern can be obtained by etching.
In the printing method, conductive ink is printed. The printing method is not particularly limited as long as it can be finely patterned, but a screen printing method can be suitably used. When a paper substrate is used as the antenna substrate 1, a printing method can be suitably used as a method for forming the antenna.
In the plating method, the catalyst layer is formed by patterning, and then the antenna is formed by electrolysis or electroless plating.
In the pattern vapor deposition method, an antenna pattern is formed by performing vapor deposition or sputtering in a pattern using a mask having an opening.
The number of turns and the shape of the antenna can be appropriately set according to the communication frequency and other characteristics.

As the IC module 3, an IC chip provided with bumps for connection to the antenna 2, an IC module having a connection pad for connection between the IC chip and the antenna 2, and the IC chip sealed with resin is used. be able to.

The IC module 3 may be arranged at the same height on the same surface (first surface 1a) as the surface on which the antenna 2 of the antenna substrate 1 is formed. Further, a concave portion or a hole portion may be provided in the first surface 1a of the antenna substrate 1, and the IC module 3 may be accommodated therein.

The IC module 3 and the antenna 2 can be connected by bonding the terminal end of the antenna 2 and the aforementioned bump or connection pad together by welding or an adhesive. As the adhesive, a conductive adhesive can be suitably used.
In addition, when it is necessary to cross the antenna 2 in designing the wiring, jumper wiring is applied to the opposite surface (second surface 1b) of the antenna base 1, and both ends of the jumper wiring are connected to both ends of the antenna 2. You may make it cross by making it conduct. Alternatively, a wiring made of an insulating base material and a conductive member may be bonded to the intersecting portion so that both ends of the wiring are electrically connected to the antenna 2.

The functional layer 4 mainly functions as a security device.
The functional layer 4 is preferably provided in the vicinity of the antenna 2. A plurality of functional layers 4 may be provided.
The functional layer 4 may be provided for decorative purposes.

As the functional layer 4, fine characters, micro characters, fine images, and the like can be used.
As the fine character, a character whose size is 2 mm × 2 mm or less can be used. Characters with sizes in this range are difficult to imitate. In addition, it is preferable to use micro characters of 1 mm × 1 mm or less because it becomes difficult to discriminate with the naked eye and the anti-counterfeit performance is further improved. Alternatively, a micro character having a character size of 300 μm × 300 μm or less, and further 100 μm × 100 μm or less may be used. In this case, it is more difficult to discriminate characters with the naked eye, and more advanced techniques are required for the creation thereof, so that the difficulty of imitation is greatly improved.
As the fine image, an image mainly composed of lines having a width of 1 mm or less, preferably about 10 μm to 500 μm can be used. It is difficult to accurately discriminate fine lines having a width in this range with the naked eye, and imitation is also difficult. Examples of such an image include a fine pattern and a background pattern.
These micro characters and fine images can be simultaneously formed on the antenna substrate 1 using the same material as the antenna 2 when the antenna 2 is formed.

Further, as shown in FIG. 3, a metal reflective layer having a diffractive structure may be used as the functional layer 4a. Since the reflected light is obtained as diffracted light by having the diffractive structure, the functional layer 4a can function as a hologram.
If a diffractive structure (fine concavo-convex structure) is formed in advance on the portion of the antenna substrate 1 where the metal reflective layer is to be formed by embossing or the like, the antenna 2 and the functional layer 4a can be simultaneously formed using the same material. .
A printing method or a plating method may be used to form the antenna 2 and the metal reflective layer on the antenna substrate 1 having the diffractive structure. In particular, an etching method and a pattern vapor deposition method that are excellent in followability to the diffractive structure provided on the antenna substrate 1 are preferable.
In addition, after the antenna 2 and the metal reflective layer are simultaneously formed using the same material, a diffractive structure (fine concavo-convex structure) may be formed on the metal reflective layer by embossing or the like.
The region where the metal reflective layer is provided and the region where the diffractive structure is provided may be different. For example, a metal reflective layer may be partially patterned in a region where the diffractive structure of the antenna substrate 1 is provided, or a region having a larger area than the metal reflective layer including the patterned metal reflective layer It may be embossed later.
Further, the metal reflective layer may be patterned so as to include the diffractive structure region provided on the antenna substrate 1, or a part of the patterned metal reflective layer may be embossed later.
Embossing can be performed by pressing the plate while applying heat.

As the functional layer 4, a latent image or a verification filter for visualizing the latent image may be used. In this case, the latent image can be verified by providing a corresponding verification filter or latent image separately from the antenna sheet 100.
As the latent image, a combination of a print latent image and a verification line filter, a combination of a polarization latent image and a polarization filter, or the like can be used.

The antenna sheet 100 according to the embodiment of the present invention includes an upper exterior base material 5 on the surface (first surface 1a) on which the antenna 2 of the antenna base material 1 is formed, and the other surface of the antenna base material 1 ( It has a lower exterior substrate 6 on the second surface 1b). One of the upper exterior substrate 5 and the lower exterior substrate 6 has concealability except for a region corresponding to a part of the antenna 2 formed on the antenna substrate 1 and the functional layer 4. That is, the antenna sheet 100 uses a concealable base material in which a region corresponding to a part of the antenna 2 formed on the antenna base material 1 and a part or all of the functional layer 4 has a light transmittance in the visible light region. It has been.
In the form of FIG. 1A, an opening region 7 described later is provided so that the number of turns of the antenna 2 can be grasped. On the other hand, as shown in FIG. 1B, the opening region 7 can be provided so that the number of turns of the antenna 2 cannot be grasped from the outside. According to such a form, it is possible to prevent the antenna design from being known.
Further, as shown in FIG. 1C, the opening region 7 can be provided so that a part of the functional layer 4 is exposed so that the entire functional layer 4 cannot be grasped from the outside. According to such a form, even if a visible portion of the functional layer 4 can be illegally duplicated, it is difficult to duplicate the portion that cannot be visually recognized, so that it is easy to determine authenticity. At this time, the opening region 7 may be provided so that the number of turns of the antenna 2 can be grasped, or the opening region 7 can be provided so that the number of turns of the antenna 2 cannot be grasped from the outside.
If the area other than the part corresponding to the part of the antenna 2 and the functional layer 4 is concealed, the entire antenna 2 and the IC module 3 cannot be visually recognized, and the shape of the IC module 3 and the antenna 2 being used is determined by a third party. Cannot be recognized.
Moreover, you may provide a character and a pattern layer in the surface of these upper exterior base materials 5 and the lower exterior base material 6. FIG. The character and pattern layers can be provided by a printing method. The printing method is not particularly limited, and an offset printing method, a gravure printing method, a screen printing method, an ink jet printing method, or the like can be used.

Although it does not specifically limit as the upper exterior base material 5, For example, the transparent base material 5a which has a concealable base material and the concealment printing layer 5b can be used.
As the transparent substrate 5a, a polyester film substrate such as polyethylene terephthalate (PET), an acrylic substrate, a polycarbonate substrate, or a vinyl chloride substrate can be used. The transparent substrate 5a may be a single layer or may be a laminate of a plurality of layers. Further, a base material capable of laser printing may be used. As such a substrate, a sheet for laser marking mainly composed of polycarbonate can be used.
The concealing print layer 5b is not particularly limited as long as it can conceal the antenna 2 and the IC module 3 arranged in the lower layer. For example, it can be provided on a transparent substrate by a printing method using an ink having a colored pigment such as white or black or a dye.
As the concealing base material, it is possible to use a plastic base material having a concealing property such as a polyester film base material such as polyethylene terephthalate (PET) containing a color pigment, an acrylic base material, a polycarbonate base material, or a vinyl chloride base material. it can. Moreover, a paper base material etc. can be used as a concealable base material.
As the concealable base material 5c, a material composed of a plurality of base materials as shown in FIG. 4 may be used. Specifically, a laminate of a transparent base material and a concealable base material having an opening may be used.
Since the antenna 2 and the IC module 3 can be shielded by using the concealing base material and the concealing printing layer, the shape of the IC module 3 and the antenna 2 being used is known to the third party by visual inspection and illegal. It can be prevented from being used.

When exposing part of the antenna 2 formed on the antenna substrate 1 and the functional layer 4 so as to be visible from above, it is preferable to use the upper exterior substrate 5 having the transparent substrate 5a and the concealed printing layer 5b. .
In this case, the concealed printing layer 5b is not provided in the portion corresponding to these so that the lower functional layer 4 and a part of the antenna 2 can be visually recognized.
The opening region 7 (opening) where the concealing printing layer 5 b is not provided may be formed so as to include the region of the functional layer 4 and the antenna 2 adjacent to the functional layer 4. The size of the opening region 7 is preferably between 5 mm × 5 mm and 30 mm × 30 mm. If it is larger than this, the degree of freedom of design of the character and picture layer provided on it will be low. If it is smaller than this, formation of the functional layer 4 becomes difficult.

Although it does not specifically limit as the lower exterior base material 6, For example, the transparent base material 6a which has a concealable base material and the concealment printing layer 6b can be used.
The same thing as the upper exterior base material 5 can be used for a concealable base material, a transparent base material, and a concealment printing layer.
When exposing a part of the antenna 2 formed on the antenna substrate 1 and the functional layer 4 so as to be visible from below, the lower exterior substrate 6 having the transparent substrate 6a and the concealment printing layer 6b is used. preferable. The opening area 7 (opening) where the concealing print layer 6 b is not provided can be formed in the same manner as the opening area 7 of the upper exterior substrate 5.

When there are a plurality of functional layers 4, one of the upper exterior substrate 5 and the lower exterior substrate 6 corresponds to a part of the antenna 2 formed on the antenna substrate 1 and at least one functional layer 4. A base material having concealability can be used except for the region.
Further, only one of the upper exterior base material 5 and the lower exterior base material 6 has concealability except for a region corresponding to a part of the antenna 2 formed on the antenna base material 1 and the plurality of functional layers 4. Also good.
Further, a part of the antenna 2 formed on the antenna substrate 1 and an upper exterior substrate 5 having concealability except for a region corresponding to at least one functional layer 4, and the antenna 2 formed on the antenna substrate 1 You may use the lower exterior base material 6 which has concealability except the area | region corresponding to a part and at least 1 other functional layer. 5 and 6 have two functional layers, and the upper exterior substrate 5 has concealability except for a part of the antenna 2 formed on the antenna substrate 1 and a region corresponding to one functional layer 4. The lower exterior substrate 6 shows an example of the antenna sheet 100 having concealability except for a part of the antenna 2 formed on the antenna substrate 1 and a region corresponding to the other functional layer 4. According to the antenna sheet 100 having such a complicated configuration, the effect of suppressing unauthorized duplication is further improved.

Further, the functional layer 4 may not be exposed entirely, may be partially exposed, and the remaining part may be concealed with a concealing base material or a concealing printing layer.

The above-described antenna sheet 100 can be used as an IC card such as an ID card, or a booklet with an IC such as a passport, a passbook or a notebook.
Hereinafter, an example in which the antenna sheet 100 is used as a booklet with an IC will be described.
FIG. 7 is a schematic explanatory view showing an example of a booklet 200 with an IC, and FIGS. 8 to 12 are cross-sectional explanatory views showing a section of the booklet 200 with an IC.
In FIG. 7, the booklet body with IC 200 includes a cover material (cover) 11 and a main paper 12 including a plurality of main paper sheets 8 and 9. The above-described antenna sheet 100 is incorporated into one 8 of a plurality of paper sheets.
For example, as shown in FIGS. 8 and 9, the upper and lower

exterior base materials

5 and 6 bonded together are used as a paper piece 8, and the antenna base material 1 and the like are sandwiched between the upper and lower

exterior base materials

5 and 6 on one side of the spread. Thus, the antenna sheet 100 can be incorporated into the paper sheet 8. The main paper piece 8 incorporating the antenna sheet 100 may be used for any of the outermost paper piece, the innermost paper piece, and the intermediate paper piece. The outermost paper piece is a main paper piece disposed adjacent to the cover 11, the innermost paper piece is a main paper piece disposed farthest from the cover 11, and the intermediate paper piece is the outermost paper piece and the innermost paper piece. It is this paper paper piece arrange | positioned between.

The cover material 11 and the paper sheets 8 and 9 may be bound by thread binding, or the outermost layers of the paper sheets 8 and 9 bound by thread binding may be bonded to the cover material 11.
As the cover material 11, cloth cloth, paper cloth, water-resistant paper, or the like can be used.
The paper sheets 8 and 9 can be made of paper or thin film.
When the outermost layers of the paper sheets 8 and 9 bound by thread binding are bonded to the cover material 11, for example, in the form shown in FIG. 9, the paper sheets 8 and 9 are first bound by thread binding and the paper adjacent to the cover 11. The paper piece 9 and the cover material 11 can be bonded together with an adhesive or the like.

When the paper sheet 8 incorporating the antenna sheet 100 is used as an intermediate paper piece, as shown in FIG. 10, it is not a double-page paper paper piece but a paper piece having a size corresponding to one page provided with a yarn binding ear. May be used.
In addition, as shown in FIG. 11, when the antenna sheet 100 is incorporated in the innermost paper piece 8, the main paper piece 8 having the antenna substrate 1 or the like is arranged in the innermost part, the main paper piece is bound by thread binding, and then the main paper piece. The antenna sheet 100 can be incorporated in the paper sheet piece 8 by bonding both sides of the spread sheet 8 so that the cover 8 is folded, and the paper sheet piece 9 adjacent to the cover 11 and the cover material 11 can be bonded together with an adhesive or the like. In addition, the antenna sheet 100 may be incorporated into the paper sheet piece 8 by binding both sides of the spread paper so that the paper sheet piece 8 is folded after the cover material 11 and the paper sheet pieces 8 and 9 are bound in the form shown in FIG.

When the antenna sheet 100 is used as a part of the paper sheet 8, as shown in FIG. 12, the paper sheet 10 adjacent to the lower exterior substrate 6 of the paper sheet 8 incorporating the antenna sheet 100 is printed latent image or It has a latent image 4c such as a polarization latent image, and the functional layer 4 of the antenna sheet 100 can be used as a verification filter 4b for visualizing these latent images.
Here, the concealment printing layer 6b can be formed so that the lower exterior base material 6 has concealability except for the region corresponding to the print latent image or the polarization latent image 4c formed on the paper sheet 10.
According to this configuration, when the paper sheet 8 incorporating the antenna sheet 100 and the paper sheet 10 provided with the latent image 4c overlap, the latent image 4c can be visualized and confirmed.
In addition, you may use the paper sheet piece 10 which has the latent image 4c in the paper sheet piece adjacent to the upper exterior base material 5. FIG. In this case, the concealed printing layer 5b may be formed so that the upper exterior substrate 5 has concealability except for the area corresponding to the print latent image or the polarization latent image 4c formed on the paper sheet 10.

Although it does not specifically limit as the lower exterior base material 6 or the upper exterior base material 5, For example, the

transparent base materials

6a and 5a which have the concealment printing layers 6b and 5b can be used.
As the

transparent substrates

6a and 5a, polyester film substrates such as polyethylene terephthalate (PET), acrylic substrates, polycarbonate substrates, and vinyl chloride substrates can be used.
The concealing

print layers

6b and 5b are not particularly limited as long as they can conceal the antenna 2 and the IC module 3 arranged in the upper layer or the lower layer. For example, it can be provided on a transparent substrate by a printing method using an ink having a colored pigment such as white or black or a dye.
As described above, the concealing

printing layers

6b and 5b are not provided in the corresponding portions so that the functional layer 4 disposed in the upper layer or the lower layer can be visually recognized from the outside. That is, the opening area 7 where the hidden

printing layers

6b and 5b are not provided may be formed so as to include the area of the functional layer 4 (corresponding to the functional layer 4).

When the latent image 4c is a print latent image, a latent image drawn with a pitch different from the above pitch is formed in a background image drawn with lines or halftone dots arranged at a predetermined pitch. Can do.
As the verification filter 4b for visualizing the latent image 4c, the functional layer 4 having a parallel stripe pattern that matches the pitch of the background image can be used. By superimposing the print latent image and the functional layer, the functional layer hides the background image, and the latent image drawn at a pitch different from the background image can be recognized.

The print latent image can be formed using a known printing method such as an offset printing method, a gravure printing method, a screen printing method, or an ink jet printing method.
The functional layer 4b that is a verification filter can be formed of the same material as the antenna 2 when the antenna 2 is formed, as described above.
In addition, when the functional layer 4b which is a verification filter is formed with metals, such as copper and aluminum, you may blacken the functional layer 4b so that metallic luster may not interfere with visualization. Specifically, a portion other than the functional layer 4b may be covered with a protective mask made of resin or the like, and acid treatment or the like may be performed to blacken the surface of the metal pattern serving as the functional layer 4b. Thereby, it becomes easy to visually recognize the visualized image.

When the latent image 4c is a polarized latent image, it can be formed by a polarizing layer having different polarization directions in the background portion and the latent image portion. Further, a retardation layer having a different phase difference between the background portion and the latent image portion may be formed on the polarizing layer having the same polarization direction.
As the verification filter 4b that visualizes the latent image 4c, a functional layer 4b that functions as a polarizing filter can be used. In this case, since the light from the background portion and the latent image portion has different polarization directions, the light from one of the background portion and the latent image portion is blocked and the light from the other is transmitted through the polarizing filter. . Thus, since the contrast difference is produced between the background portion and the latent image portion through the polarizing filter, the latent image can be recognized.
As such a polarizing filter, a functional layer having a stripe pattern of 1,000 or more per 1 mm can be used. The number of stripe patterns can be arbitrarily set according to the frequency of the target light. If the polarized light in the visible light range is selectively transmitted, the number of stripe patterns may be about 5,000 to 10,000 per mm.

The liquid crystal latent image can be formed using a known method.
The functional layer 4b that is a verification filter can be formed of the same material as the antenna 2 when the antenna 2 is formed, as described above.
In addition, when the functional layer 4b which is a verification filter is formed with metals, such as copper and aluminum, you may blacken the functional layer 4b so that metallic luster may not interfere with visualization. Specifically, a portion other than the functional layer 4b may be covered with a protective mask made of resin or the like, and acid treatment or the like may be performed to blacken the surface of the metal pattern serving as the functional layer 4b. Thereby, it becomes easy to visually recognize the visualized image.

Further, the antenna sheet 100 may be used by being directly bonded to the back surface of the cover material 11. In this case, the outermost paper piece of the stapled paper pieces can be bonded to the cover material 11.

The antenna sheet 100 can be used as an IC card such as an ID card as it is. If necessary, a single or multiple intermediate layer or the like laminated on the antenna sheet 100 to form a card can be used as an IC card.
For the intermediate layer, a substrate similar to the upper exterior substrate and the lower exterior substrate can be used.
When an IC module with external connection terminals is used as the IC module, a so-called dual IC card capable of contact communication and non-contact communication can be obtained. FIG. 13 shows a dual type IC card 150 using the antenna sheet 100 described above.
In addition, the IC card may be provided with a magnetic recording layer and a surface printing layer as necessary, or post-processing such as embossing.

Further, when a latent image or a verification filter is used as the functional layer of the IC card, the authenticity of the IC card can be verified using a medium on which a verification filter or a latent image is separately formed.

An antenna sheet having high security can be provided.

DESCRIPTION OF SYMBOLS 100 Antenna sheet 1 Antenna base material 1a First surface 1b of antenna base material 1b Second surface of antenna base material 2 Antenna 3 IC module 4 Functional layer 4a Functional layer (diffractive structure)
4b Functional layer (Verification filter)
4c Print latent image or polarized latent image 5 Upper exterior substrate 5a Upper exterior substrate 5b Hidden printing layer 5c Upper exterior substrate (concealable substrate)
6 Lower exterior substrate 6a Lower exterior substrate 6b Hidden printing layer 7 Opening area (opening)
8 Paper sheet piece incorporating antenna sheet 9 Paper paper piece 10 Paper paper piece having latent image 11 Cover material 12 Paper 150 IC card 200 IC booklet

Claims

An antenna substrate having a first surface and a second surface opposite to the first surface;
An antenna formed on the first surface of the antenna substrate;
An IC module connected to the antenna;
A functional layer formed of the same material as the antenna on the first surface of the antenna substrate;
An upper exterior substrate facing the first surface of the antenna substrate;
A lower exterior substrate facing the second surface of the antenna substrate;
An antenna sheet comprising:
One of the upper exterior substrate and the lower exterior substrate has concealability except for a region corresponding to a part of the antenna and a part or all of the functional layer,
All or a part of the other of the upper exterior substrate and the lower exterior substrate has a concealing property.
The functional layer reveals fine characters and micro characters whose size of one character is 2 mm × 2 mm or less, a fine image having a line width of 10 μm to 500 μm, a metal reflective layer having a diffraction structure, a latent image, and a latent image. The antenna sheet according to claim 1, comprising at least one of verification filters.
The upper exterior substrate has a transparent substrate and a concealing print layer,
The antenna sheet according to claim 1, wherein the concealable printed layer is formed in a region excluding a region corresponding to a part of the antenna and a part or all of the functional layer.
The antenna sheet according to any one of claims 1 to 3, wherein the antenna and the functional layer are formed of a metal thin film, a conductive printed layer, or metal plating.
Cover material;
A book having a plurality of book pieces;
An antenna sheet incorporated in the paper as one of the plurality of paper paper pieces or bonded to the cover material;
A booklet with an IC comprising:
The antenna sheet is:
An antenna substrate having a first surface and a second surface opposite to the first surface;
An antenna formed on the first surface of the antenna substrate;
An IC module connected to the antenna;
A functional layer formed of the same material as the antenna on the first surface of the antenna substrate;
An upper exterior substrate facing the first surface of the antenna substrate;
A lower exterior substrate facing the second surface of the antenna substrate;
Have
One of the upper exterior substrate and the lower exterior substrate has concealability except for a region corresponding to a part of the antenna and a part or all of the functional layer,
A booklet with an IC, wherein the other of the upper exterior substrate and the lower exterior substrate has a concealing property.
The functional layer is a fine character having a size of 2 mm × 2 mm or less, a micro character, a fine image having a line width of 1 mm or less, a metal reflective layer having a diffractive structure, and a verification filter that reveals a latent image The booklet with IC according to claim 5, comprising at least one of the following.
The upper exterior substrate has a transparent substrate and a concealing print layer,
The booklet with an IC according to claim 5 or 6, wherein the concealable printed layer is formed in a region excluding a region corresponding to a part of the antenna and the functional layer.
The IC-attached booklet according to any one of claims 5 to 7, wherein the antenna and the functional layer are formed of a metal thin film, a conductive printed layer, or metal plating.
The antenna sheet is incorporated into one of the plurality of paper pieces;
The functional layer is a verification filter or polarizer that exposes a latent image;
Of the plurality of paper sheets, a paper sheet piece adjacent to the lower exterior base material of the antenna sheet has at least one of a print latent image and a polarization latent image,
The lower exterior base material of the antenna sheet has concealability except for a region corresponding to at least one of the print latent image and the polarization latent image formed on the paper sheet adjacent to the lower exterior base material. The booklet with an IC according to any one of claims 5 to 7.
The lower exterior substrate has a transparent substrate and a concealing print layer,
10. The concealable printing layer is formed on the entire surface except for a region corresponding to at least one of the print latent image and the polarization latent image formed on the adjacent paper sheet pieces. Booklet with IC.
The antenna sheet is incorporated in one of the plurality of paper sheets such that the antenna sheet is adjacent to the cover material,
The booklet with an IC according to any one of claims 5 to 8, wherein the cover material has an opening in a region corresponding to a functional layer formed on the antenna sheet.
An IC card comprising the antenna sheet according to any one of claims 1 to 4.