JP2007144861A - Wireless ic booklet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless IC booklet capable of increasing the storable amount of information and performing stable communication processing. <P>SOLUTION: The wireless IC booklet 1 is constituted by binding a plurality of sheets of internal papers 6a-6d between two sheets of covers 2 and 4. Each of the internal papers 6 is constituted respectively by sticking a wireless IC sheet 8 with an LSI 12 and an antenna 14 and an amorphous metal sheet 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless IC booklet capable of wireless data communication.

  Conventionally, as a wireless IC booklet, a booklet using a shield member that hardly shields or allows electromagnetic waves to pass through is known (for example, see Patent Document 1). An IC unit having an IC chip and an antenna capable of exchanging information with radio waves from the outside without contact is provided inside the booklet.

  In this booklet, metals such as aluminum, copper, and iron, alloys such as permalloy, ferrites, etc. are used as shield members. When the cover is opened and the IC unit is opposed to the information reading unit, information is exchanged. The electromagnetic wave coming out from the antenna is shielded. This prevents forgery and alteration by radio waves for illegal purposes from the outside.

  However, when the above-described permalloy or ferrite is used as a shield member, it achieves a sufficient magnetic shield function, but has a problem that the communication distance is shortened because loss due to eddy current is relatively large and energy loss is large.

  In recent years, in the field of such a wireless IC booklet, the amount of information stored in an IC chip tends to increase with the diversification of services. For this reason, the appearance of a wireless IC booklet capable of mounting a plurality of IC chips is desired.

However, for example, when an IC chip is mounted on a plurality of pages of the above-described conventional wireless IC booklet, when trying to wirelessly communicate with an IC chip attached to a specific page, it is not desired with other IC chips. Communication may be established, and normal communication processing may not be performed.
JP 11-348471 A (paragraph [0014], FIG. 6)

  An object of the present invention is to provide a wireless IC booklet that can increase the amount of information that can be stored and can perform stable communication processing.

  In order to achieve the above object, the wireless IC booklet of the present invention is characterized in that a plurality of IC sheets each having an LSI and an antenna are bound, and an amorphous metal layer is bonded to non-opposing surfaces of each IC sheet. .

  Further, the wireless IC booklet of the present invention binds a plurality of IC sheets each having an LSI and an antenna, and is affixed to the first IC sheet of the plurality of IC sheets to shield the first IC sheet. In addition, an amorphous metal layer that functions to shield the second IC sheet bound next to the first IC sheet in a state where the first IC sheet is opened to the opposite side is provided with the plurality of ICs. It is characterized by being bonded to each sheet.

  According to the above-described invention, since the amorphous metal layer is bonded to each of the IC sheets having the LSI and the antenna, it is possible to prevent a problem of communicating with another IC chip when performing wireless communication with the IC chip of each IC sheet.

  Since the wireless IC booklet of the present invention has the above-described configuration and operation, the amount of storable information can be increased and stable communication processing can be performed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic perspective view of a state in which a wireless IC booklet 1 (hereinafter simply referred to as booklet 1) according to an embodiment of the present invention is opened. FIG. 2 shows the booklet 1 as viewed from the direction of arrow II in FIG. As the booklet 1, for example, there is a personal authentication medium such as a bank passbook, employee ID card, student ID card.

  The booklet 1 is bound on one side by sandwiching a plurality of intermediate sheets 6 having substantially the same shape between two rectangular covers 2, 4 (one cover may be folded as shown). Is formed. Each of the plurality of intermediate sheets 6 is formed by bonding a wireless IC sheet 8 (IC sheet) and an amorphous metal sheet 10 (amorphous metal layer) one by one in the same direction.

  In other words, each amorphous metal sheet 10 is bonded to a surface where the wireless IC sheets 8 do not face each other. In other words, the amorphous metal sheets 10 and the wireless IC sheets 8 are alternately stacked, and are bonded together as a set of two sheets one by one to form the inner paper 6. In FIG. 2, the thickness of each sheet 8, 10 of each middle paper 6 is exaggerated for easy understanding, but the actual sheets are bound together on one side. ing.

  All the wireless IC sheets 8 have an LSI 12 and a coil antenna 14 (antenna). The LSI 12 and the antenna 14 constitute an equivalent circuit shown in FIG. The wireless IC sheet 8 converts the magnetic field lines supplied from the reader / writer 20 shown in FIG. 4 into electric power via the antenna 14, operates the LSI 12 with this electric power, and returns a response to the reader / writer 20 with the remaining electric power. . Thus, the wireless IC sheet 8 performs data communication with the reader / writer 20 in a non-contact manner.

  The wireless IC sheet 8 is formed by forming a pattern of the antenna 14 having a thickness of 0.03 [mm] on aluminum on a base material (not shown) of polyethylene tephrate (PET) having a thickness of 0.038 [mm]. In addition, the LSI 12 is mounted by a flip chip method, and the front and back surfaces of the PET are sandwiched between PET-G (non-crystalline polyester) sheets (not shown) and integrated by a vacuum hot press.

  These PET-G sheets on the front and back surfaces function as a resin layer for forming a gap between the antenna 14 of the wireless IC sheet 8 and the amorphous metal sheet 10 bonded to the wireless IC sheet 8. In addition, this PET-G sheet is composed of an amorphous metal sheet 10 of another inner paper 6 bound adjacent to the opposite side separated from the amorphous metal sheet 10 to be bonded to the wireless IC sheet 8 and its own antenna 14. It also functions as a resin layer that forms a gap between them.

  The amorphous metal sheet 10 is formed of an amorphous metal having a thickness of 0.1 [mm], and is formed at a position and size that at least partially covers the antenna 14 of the wireless IC sheet 8 to be bonded. In addition, the amorphous metal sheet 10 partially covers the antenna 14 incorporated in the wireless IC sheet 8 of the inner paper 6 that is bound adjacent to the opposite side separated from the wireless IC sheet 8 to be bonded. Is formed.

  In the present embodiment, the amorphous metal sheet 10 is formed in a size that covers the entire antenna 14 of the wireless IC sheet 8. More specifically, in the present embodiment, each of the amorphous metal sheets 10 is attached to substantially the entire surface of the wireless IC sheet 8.

  As described above, the booklet 1 according to the present embodiment has the antenna 14 and the LSI 12 for wireless communication with the reader / writer 20 on each of the plurality of middle sheets 6, so that it is stored in one booklet 1. The amount of possible information can be dramatically increased, and it is possible to cope with the diversification of services.

  Hereinafter, the function of the amorphous metal sheet 10 during wireless communication between the booklet 1 having the above structure and the reader / writer 20 will be described with reference to FIG. Here, in order to make the explanation easy to understand, a booklet 1 in which four middle sheets 6a to 6d are bound between two cover sheets 2 and 4 will be described as an example. In particular, this booklet 1 is in a bound state (not shown), and in all the middle sheets 6, two sheets are arranged so that the wireless IC sheet 8 is located on the cover 2 side and the amorphous metal sheet 10 is located on the cover 4 side. The sheets 8 and 10 are attached to each other.

  When the booklet 1 having the above structure is placed on the reader / writer 20, as shown in FIG. 4, an antenna 22 (hereinafter referred to as an R / W antenna 22) of the reader / writer 20 is opened with a page desired to be communicated with the booklet 1 opened. Called). Here, the page for which communication is desired is the middle paper 6c closest to the reader / writer 20 on the left side in FIG.

  In this state, the magnetic flux 30 from the R / W antenna 22 of the reader / writer 20 passes through the opening of the antenna 14 of the inner paper 6c having the wireless IC sheet 8 to be communicated, and the LSI 12 of the wireless IC sheet 8 Is powered. At this time, since the magnetic flux 30 from the R / W antenna 22 needs to pass between the antenna 14 and the amorphous metal sheet 10 to form a loop, the PET-G sheet constituting the wireless IC sheet 8 forms a gap. It has a function to do. In this way, wireless communication between the LSI 12 of the wireless IC sheet 8 and the reader / writer 20 becomes possible by passing the magnetic flux 30 through the antenna 14.

  At this time, since the amorphous metal sheet 10 is affixed to the side away from the reader / writer 20 of the wireless IC sheet 8 in the intermediate paper 6c to be communicated, the magnetic flux 30 from the R / W antenna 22 is applied. There is no worry of leaking outside through the booklet 1. Further, the amorphous metal sheet 10 functions to shield the magnetic flux 30 from the R / W antenna 22 against the other intermediate paper 6d bound between the intermediate paper 6c and the cover 4.

  That is, by attaching the amorphous metal sheet 10 to the back surface side of the wireless IC sheet 8 that is separated from the reader / writer 20 on the intermediate paper 6c close to the reader / writer 20, the wireless IC of the intermediate paper 6d that is not subject to communication is attached. The problem of undesirably establishing communication with the LSI 12 incorporated in the sheet 8 can be prevented, and reliable communication processing can be performed. In other words, since the amorphous metal sheet 10 has a high magnetic permeability, it can effectively shield electromagnetic waves and prevent the generation of noise.

  Moreover, since the amorphous metal sheet 10 has less loss due to eddy currents caused by electromagnetic waves than a metal sheet such as iron, the energy loss is small and the communication distance can be substantially maintained. In other words, by adopting the amorphous metal sheet 10 as a shield member, it is possible to sufficiently shield electromagnetic waves and secure a sufficient communication distance.

  By the way, as shown in FIG. 4, when the page of the booklet 1 is opened and placed on the R / W antenna 22, the wireless IC sheet 8 of the page opened on the cover 2 side, that is, on the right side (opposite side) in the figure. There is a possibility that leakage magnetic flux from the R / W antenna 22 passes. As described above, when the leakage magnetic flux passes through the wireless IC sheet 8 that is not a communication target, an undesired noise component may be generated.

  On the other hand, in the present embodiment, since the amorphous metal sheet 10 is bonded to the wireless IC sheet 8 in each inner paper 6, it is incorporated into the wireless IC sheet 8 with the inner paper opened to the cover 2 side. Thus, the magnetic flux 30 from the reader / writer 20 can be shielded against the antenna 14.

  More specifically, for example, when attention is paid to the amorphous metal sheet 10 on the middle paper 6b on the cover 2 side, the amorphous metal sheet 10 is formed when the booklet 1 is opened in the state shown in FIG. This wireless IC sheet 8 (first IC sheet) functions to shield the magnetic flux 30 from the reader / writer 20. In addition, the amorphous metal sheet 10 is wiretapped as described above in a state where the inner paper 6b is opened on the cover 4 side (opposite side), that is, in a state where it is disposed at the position of the inner paper 6c in FIG. And the radio IC sheet 8 (second IC sheet) of the inner paper 6c bound next to the magnetic flux 30 from the reader / writer 20 functions.

  That is, the amorphous metal sheet 10 provided on each intermediate paper 6 exhibits different functions depending on the side on which the intermediate paper 6 is opened, that is, depending on the change in the posture of the intermediate paper 6. Specifically, in FIG. 4, when the inner cover 6 is opened on the cover 4 side, the wireless IC sheet 8 of the other intermediate sheet disposed between the cover 4 and the cover 4 is shielded, and the cover 2 is moved to the cover 2 side. In the opened state, the wireless IC sheet 8 is shielded.

  As described above, according to the present embodiment, since the booklet 1 in which a plurality of wireless IC sheets 8 having the LSI 12 and the antenna 14 are bound is configured, a plurality of LSIs 12 can be mounted on one booklet 1. The amount of information that can be stored in can be greatly increased. In addition, since the amorphous metal sheet 10 is pasted on each page of the booklet 1, it is possible to prevent problems that undesirably establish communication with the LSI 12 incorporated in the intermediate paper 6 that is not subject to communication. Thus, reliable and stable communication processing is possible.

  In addition, the amorphous metal sheet 10 can prevent electromagnetic waves due to data communication from leaking to the outside in a state where the booklet 1 is placed over the R / W antenna 22 of the reader / writer 20, and data can be altered by unauthorized radio waves. Can be prevented.

  In addition, according to the present embodiment, since amorphous metal is used as the electromagnetic wave shield layer, loss due to eddy current can be reduced, energy loss can be reduced, and communication distance is shortened compared to the case where no shield layer is provided. Can be prevented. That is, according to the present embodiment, it is possible to improve the security of data communication while ensuring a sufficient communication distance.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above.

  For example, in the above-described embodiment, the case where the amorphous metal sheet 10 is attached to the substantially entire surface of all the middle sheets 6 of the booklet 1 has been described. The amorphous metal sheet 10 may be attached to the overlapping position.

The schematic perspective view which shows the state which opened the radio | wireless IC booklet which concerns on embodiment of this invention. The figure which looked at the booklet of FIG. 1 from the direction of arrow II. FIG. 2 is a diagram for explaining a circuit configuration incorporated in each page of the booklet of FIG. 1. Operation | movement explanatory drawing for demonstrating the function of the amorphous metal sheet affixed on each page of the booklet of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Wireless IC booklet, 2, 4 ... Cover, 6, 6a-6d ... Middle paper, 8 ... Wireless IC sheet, 10 ... Amorphous metal sheet, 12 ... LSI, 14 ... Coil antenna, 20 ... Reader / writer, 22 ... R / W antenna, 30 ... magnetic flux.

Claims (10)

  A wireless IC booklet characterized in that a plurality of IC sheets each having an LSI and an antenna are bound, and an amorphous metal layer is bonded to non-opposing surfaces of each IC sheet.   The wireless IC booklet according to claim 1, wherein the amorphous metal layer is provided at a position at least partially covering the antenna of the IC sheet to be bonded.   3. The wireless IC according to claim 2, wherein the amorphous metal layer is provided at a position that at least partially covers an antenna of another IC sheet that is bound to the back surface side separated from the IC sheet to be bonded. booklet.   The wireless IC booklet according to claim 1, wherein the amorphous metal layer is formed in a size that covers the entire antenna of the IC sheet to be bonded.   2. The wireless IC booklet according to claim 1, wherein each of the plurality of IC sheets has a resin layer for forming a gap between the amorphous metal layer to be bonded and its own antenna.   A plurality of IC sheets each having an LSI and an antenna are bound, and affixed to the first IC sheet of the plurality of IC sheets to shield the first IC sheet and opposite the first IC sheet An amorphous metal layer that functions to shield the second IC sheet bound next to the first IC sheet in a state opened to the side is bonded to each of the plurality of IC sheets. Wireless IC booklet.   7. The wireless IC booklet according to claim 6, wherein the amorphous metal layer bonded to the first IC sheet is provided at a position at least partially covering the antenna of the first IC sheet. .   8. The wireless IC booklet according to claim 7, wherein the amorphous metal layer bonded to the first IC sheet is provided at a position at least partially covering the antenna of the second IC sheet. .   The wireless IC booklet according to claim 6, wherein the amorphous metal layer bonded to the first IC sheet is formed to a size that covers the entire antenna of the first IC sheet.   The wireless IC booklet according to claim 6, wherein each of the plurality of IC sheets has a resin layer for forming a gap between the amorphous metal layer to be bonded and the antenna.

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