JP2005309492A - Radio information medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the unauthorized reuse of a once attached radio information medium, and to protect information stored in a memory. <P>SOLUTION: In this radio information medium, an IC chip having an information writing means, an information reading means, and an information storing means, and an oscillation coil having a radio signal transmitting/receiving means are placed on the first main surface of a film-shaped base, and a tacky adhesive layer is formed on the back face of the first main surface. The tacky adhesive layer is provided with an easily peelable region outside the IC chip placing region. Consequently, it is possible to prevent the illegal reuse of the once attached radio information medium, and to protect the information stored in the memory. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless information medium that prevents reuse in order to properly manage the traceability of articles.

  Traceability management using wireless information media such as IC tags and IC labels is widespread due to the importance of traceability management based on material-specific information such as materials of industrial products, agricultural products, foodstuffs, production locations, distribution channels, etc. Has been done. On the other hand, there is a concern about unauthorized use such as removing a wireless information medium from an article to disguise information or reusing it for another article. As a conventional wireless information medium, there is one that takes the form of an IC label and has a structure in which an IC chip and an antenna are destroyed to prevent reuse when the IC label once attached to an article is peeled off (for example, patents) Reference 1).

  FIG. 2 is a cross-sectional view showing a conventional wireless information medium described in the patent document.

In FIG. 2, the IC tag includes an IC chip 101 in which a CPU, a memory, a modulation / demodulation circuit, and a power supply control circuit are integrated, and a conductive wire 103 that connects the antenna 102 and the IC chip 101 on substantially the same plane. And sandwiched between the first adhesive layer 104 and the second adhesive layer 105, the surface base material 106 is outside the first adhesive layer 104, and the release liner 107 is outside the second adhesive layer 105. Are integrated into a sheet shape and are sandwiched between adhesive layers 104 and 105. Among the IC chips 101, the surface area of the lead wire 103, the IC chip 101, etc. is much smaller than the surface area of the coiled antenna 102. Therefore, when the IC tag is once pasted on the component to be pasted and then peeled off, the main body portion including the antenna 102, the conductor 103 and the IC chip 101 is used. An external force that resists the adhesive force acting on the surface of the adherend is applied, and the external force is applied non-uniformly to each part constituting the main body part, causing the disconnection of the conductive wire 103 and the terminal of the IC chip 101. The reuse part was prevented by destroying the connection part with the part.
JP 2000-251164 A

  However, in the conventional configuration, the IC chip 101 in which the CPU, the memory, the modem circuit, and the power supply control circuit are integrated may be destroyed. When the IC chip 101 is destroyed, there is a problem that it becomes difficult to read information stored in a memory built in the IC chip 101.

  An object of the present invention is to solve the above-described conventional problems, and to provide a wireless information medium that prevents reuse and destruction of memory storage information when a wireless information medium once pasted is peeled off.

  In order to solve the above-described conventional problems, a wireless information medium according to the present invention includes an IC chip including an information writing unit, an information reading unit, and an information storage unit on a first main surface of a film-like substrate; In the wireless information medium in which the resonance coil having the receiving / transmitting means is mounted and the adhesive material layer is formed on the back surface of the first main surface, the adhesive material layer is easily peeled off around the IC chip mounting area. It has a region.

  With this configuration, it is possible to prevent unauthorized reuse of the wireless information medium once pasted, and to protect the information stored in the memory.

  As described above, according to the wireless information medium of the present invention, an IC tag used for traceability management based on information unique to an article such as a material of an industrial product, an agricultural product, a foodstuff, a production location, a distribution route, etc. It is possible to prevent unauthorized use such as disguising information such as an IC label or reusing it for another article. Furthermore, since the IC chip is not destroyed, information unique to the peeled article can be retained.

   Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a cross-sectional view showing an IC label as a wireless information medium according to an embodiment of the present invention.

  In FIG. 1, an IC chip 7 is a semiconductor element in which a CPU, a memory, a modulation / demodulation circuit, and a power supply control circuit are integrated, and a paper, a synthetic resin, a polyimide film, or the like having excellent insulation and moisture resistance is processed into a film shape. The first main surface of the substrate 3 is placed together with an antenna 6 made of a thin film resonance coil. The antenna 6 can be formed by patterning a conductive paste such as gold, silver, or copper, attaching a thin film such as gold, silver, or copper, or depositing gold, silver, copper, or the like by vapor deposition. The first main surface of the substrate 3 is protected between the IC chip 7 and the antenna 6 by a protective film 8 in which paper or synthetic resin having excellent insulation and moisture resistance is processed into a film. The IC chip 7 and the antenna 6 are conductively connected, and information writing, information reading, and information storage are performed using a dielectric voltage received from a radio wave transmitted from an information identification device (not shown). Further, the antenna 6 is stretched around the IC chip 7, and when the attached IC label is peeled off, only the antenna 6 is peeled off and the IC chip 7 remains. As a structure in which only the antenna 6 is peeled off, an easily breakable portion 9 such as a perforation or a lead ruler is provided around the IC chip 7. In addition, a structure in which the adhesive force of the adhesive material layer 2 positioned below the antenna 6 is reduced and formed in an easily peelable region is also effective.

  An adhesive material layer 2 made of acrylic or rubber is provided on the second main surface of the substrate 3, and a release paper 1 made of paper or film covering the adhesive material layer 2 is further provided.

  According to such a configuration, when the IC label is illegally peeled off, the IC chip 7 and the antenna 6 are disconnected, so that it is impossible to receive radio waves transmitted by the information identification device (not shown). It becomes possible to write information, read information, and store information without being able to induct the power supply voltage, so that information is not camouflaged. Further, since the IC chip 7 remains without being destroyed, the information unique to the peeled article is retained. Further, since the IC chip 7 remains in the article, it is not illegally reattached to another article.

  In addition, since the antenna 6 made of a resonance coil is not particularly useful except when communicating, even if the IC label is peeled off, there is no particular influence even if it is destroyed.

  In this embodiment, an IC label is used as the wireless information medium. However, any wireless information medium having a configuration in which a power supply voltage is secured by the dielectric of the antenna 6 made of a resonance coil can be used as appropriate. .

  It is useful for traceability management of proper goods, and is particularly suitable for wireless information media.

Sectional drawing of the radio | wireless information medium in embodiment of this invention Sectional view of a conventional wireless information medium

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Release paper 2 Adhesive material layer 3 Base | substrate (film)
6 Antenna 7 IC chip 8 Protective coating 101 IC chip 102 Antenna 103 Conductor 104 First adhesive layer 105 Second adhesive layer 106 Surface base material 107 Liner

Claims (3)

An IC chip having information writing means, information reading means, and information storage means, and a resonance coil having radio signal receiving / transmitting means are mounted on the first main surface of the film-like substrate. The wireless information medium in which an adhesive material layer is formed on the back surface of the main surface, wherein the adhesive material layer has an outer periphery of the IC chip mounting area as an easily peelable area. The wireless information medium according to claim 1, wherein the adhesive material layer is formed with an adhesive layer having a greater adhesive force in the IC chip mounting area than in the easily peelable area. The wireless information medium according to claim 1, wherein an easily breakable portion means is formed in a vertical direction around the IC chip mounting area.

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