JP2009282732A - Contactless ic tag - Google Patents

Abstract

There is provided an IC tag that prevents easy misreading before use and realizes simple and reliable article management without mistaking two IC tags corresponding one-to-one.
An IC tag includes IC tags 3a and 3b, and has antenna coils 7a and 7b on a base film 5. The antenna coil 7a is connected to an IC chip 9a, and the antenna coil 7b is connected to the IC chip 9b. is doing. The antenna coils 7a and 7b have short-circuit circuits 11a and 11b in parallel with the IC chips 9a and 9b. Unless the short-circuit circuits 11a and 11b are disconnected, the IC chips 9a and 9b read information in the IC by wireless communication. Cannot write. The IC tag 1 is cut along the cut line 15 and the short circuits 11a and 11b are cut, so that the IC chips 9a and 9b can read and write information in the IC by wireless communication, and the IC tags 3a and 3b are externally connected. It becomes accessible from the device.
[Selection] Figure 1

Description

  The present invention relates to an IC tag that performs non-contact communication.

  In recent years, IC tags that perform non-contact communication with external devices have been widely used. This IC tag is classified into an active type in which a battery is incorporated to transmit information and a passive type in which electric power is received with a radio wave received without incorporating a battery. Of these, passive IC tags are those in which an external device sends power using radio waves, and the IC chip is activated by the power. The radio waves also include instructions and requests for the IC chip. And receive commands at the same time. The IC tag sends an answer to the instruction on the radio wave. The reach of radio waves is as short as several meters at the maximum, but it is small and lightweight, and can be manufactured at a much lower cost than the active type. Therefore, it is expected that passive IC tags will be widely used in the future.

  The passive IC tag may have any shape as long as it has an IC chip and an antenna. For example, there are a disk type, a cylindrical type, a card type, a box type, etc., all of which are about several centimeters in the long direction. In addition, research and development has progressed and the price tends to be low, and it has been proposed that various products can be attached with IC tags to enable information management during distribution processes and storage. For example, various article management systems have been proposed in which IC tags are attached to articles such as luggage, clothes, books, etc., so that inventory management of goods and logistics management can be performed. In particular, it has been proposed that IC tags are attached to both articles and ledgers for more efficient management.

  Further, a short circuit is formed between the terminals of the antenna coil connected to the IC chip, and unless the short circuit is cut off, the IC tag cannot read and write information in the IC by wireless communication, and the short circuit An IC tag is disclosed, in which the IC tag can read and write information in the IC by wireless communication when is disconnected (see Patent Document 1).

Japanese Patent Laid-Open No. 11-78323

  However, when an IC tag is attached to both an article and a ledger, the IC tag for the article and the IC tag for the ledger are brought together, so that the IC tag for the article and the IC tag for the ledger are easily mixed. was there. In addition, there is a problem that, for example, an IC tag for a ledger corresponding to an IC tag before being attached to an article is read by mistake with an IC tag for a ledger corresponding to the IC tag attached to the article.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to avoid misreading two IC tags corresponding one-to-one, to prevent misreading before use, and to make a simple and reliable article. It is to provide an IC tag that realizes management.

  In order to achieve the above-described object, the first invention provides a first antenna coil, a first IC chip connected to the first antenna coil, the first IC chip, and the first antenna. A first short circuit connected to the coil, a second antenna coil, a second IC chip connected to the second antenna coil, and a connection to the second IC chip and the second antenna coil Before the first short circuit is cut off, the first IC chip cannot read and write information in the IC by wireless communication, and the first short circuit After the circuit is disconnected, the first IC chip can read and write information in the IC by wireless communication. Before the second short circuit is disconnected, the second IC chip is by wireless communication. Reading information in the IC, I can not write, after said second short circuit is cut, the second IC chip is read in IC in the information by wireless communication, an IC tag, wherein a can be written.

  In the second invention, both ends of the first antenna coil are connected to both ends of the first IC chip, both ends of the first IC chip are connected to the first short circuit, and the second antenna coil Both ends of the second IC chip are connected to both ends of the second IC chip, and both ends of the second IC chip are connected to a second short circuit.

  Moreover, it is preferable that it has a cut line and the cut line passes through the short circuit.

  Further, it is preferable that the IC tag is cut according to the cut line so that the first IC chip and the second IC chip can read and write information in the IC by wireless communication.

  According to a third aspect of the present invention, there is provided a first antenna coil, a first IC chip connected to the first antenna coil, and a first short circuit connected to the first IC chip and the first antenna coil. And a second IC coil connected to the second antenna coil, and the first IC chip is wireless before the first short circuit is disconnected. The information in the IC cannot be read or written by communication, and the first IC chip can read or write the information in the IC by wireless communication after the first short circuit is disconnected, and the second antenna Before the coil is cut, the second IC chip can read and write information in the IC by wireless communication, and after the second antenna coil is cut, the second IC chip is by wireless communication. IC details Reading of an IC tag which is characterized in that can not be written.

  According to a fourth aspect of the present invention, both ends of the first antenna coil are connected to both ends of the first IC chip, both ends of the first IC chip are connected to the first short circuit, and the second antenna coil Both ends of the IC tag are connected to both ends of the second IC chip.

  It is preferable to have a cut line, and the cut line passes through the first short circuit and the second antenna coil.

  Further, by cutting the IC tag in accordance with the cut line, the first IC chip can read and write information in the IC by wireless communication, and the second IC chip has information in the IC by wireless communication. It is preferable that reading and writing cannot be performed.

  According to the present invention, it is possible to provide an IC tag that does not mistake two IC tags corresponding to one to one, prevents misreading before use, and realizes simple and reliable article management.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The IC tag 1 according to the first embodiment will be described.
FIG. 1A is a diagram showing the IC tag 1 before separation, and FIG. 1B is a diagram showing the IC tags 3a and 3b after separation. For the sake of explanation, FIG. 1 is drawn so that the surface layer 17 (to be described later) of the IC tag 1 is omitted and the arrangement of the antenna coil 7 and the like can be understood.

  As shown in FIG. 1A, an IC tag 1 is formed by connecting IC tags 3a and 3b. The IC tag 3a has an antenna coil 7a on the base film 5, an IC chip 9a connected to the antenna coil 7a, and a connection circuit 13a connecting the antenna coils 7a, and the antenna coil 7a in parallel with the IC chip 9a. A short circuit 11a connected to the. Similarly, the IC tag 3b includes an antenna coil 7b, an IC chip 9b, a short circuit 11b, and a connection circuit 13b. The connection circuits 13a and 13b are in a different layer from the antenna coils 7a and 7b and do not short-circuit with the antenna coils 7a and 7b.

  The IC tag 1 has a cut line 15 at the center. As shown in FIG. 2, the cut line 15 is formed by a hole 16 and is a so-called perforation. The cut line 15 is provided to facilitate the cutting of the IC tags 3 a and 3 b from the IC tag 1. Can be cut. The cut line 15 must not cut only the short-circuit circuits 11a and 11b, and not the IC chips 9a and 9b, the antenna coils 7a and 7b, and the connection circuits 13a and 13b.

  The hole 16 may or may not penetrate the IC tag 1, but the width is shorter than the line width of the short circuit 11. This is to prevent the short circuit 11 from being cut when the cut line 15 is formed. The holes 16 are formed by a method such as pressing, counterbore, or cutting with a cutting blade.

  As shown in FIG. 1B, when the IC tag 1 is cut along the cut line 15 to become IC tags 3a and 3b, the short circuit 11 is cut.

FIG. 3 is a cross-sectional view taken along the line AA of the IC tag 1 shown in FIG.
As shown in FIG. 3, an antenna coil 7a is provided on the base film 5, and an IC chip 9a is connected to the antenna coil 7a. A film 21 is provided on the IC chip 9 a, and an inlet 29 is formed by the base film 5, the antenna coil 7 a, the IC chip 9 a, and the film 21. The inlet 29 has the surface layer 17 through the adhesive layer 19 and the release layer 25 through the adhesive layer 23. In FIG. 3, the hole 16 does not penetrate the adhesive layer 23 and the release layer 25, but when the IC tag 1 is cut out together with the release layer 25, the hole 16 has the adhesive layer 23 and the release layer 25. May also penetrate.

  As the base film 5, a resin film or a paper base material can be used. Resin films include PET (polyethylene terephthalate), PET-G (terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer), polypropylene, polyethylene, polycarbonate, polyamide, polyphenylene sulfide, polyvinyl chloride, vinyl chloride-vinyl acetate. Materials such as a copolymer, cellulose diacetate, cellulose triacetate, polystyrene, ABS (acrylonitrile-butadiene-styrene copolymer), polyacrylic acid ester, and polyurethane are used. Further, as the paper substrate, fine paper, coated paper, craft paper, glassine paper, synthetic paper, latex, melamine impregnated paper, and the like can be used.

  The antenna coil 7 is a planar coil-shaped antenna made of a metal film or thin wire such as aluminum or copper patterned on the base film 5. The antenna coil 7 is used for both transmission and reception.

  The IC chip 9 includes a control unit, a memory unit for storing information, a non-contact type IC wireless communication unit, and the like.

  The adhesive constituting the adhesive layer 19 includes various materials such as natural rubber, nitrile rubber, epoxy resin, vinyl acetate emulsion, acrylic, acrylate copolymer, polyvinyl alcohol, and phenol resin. Can be used. The adhesive includes various types such as a solvent type, a polymerization type, an ultraviolet curable type, an emulsion type, and a heat melting type, and includes a so-called adhesive type. In either case, the purpose can be achieved by bonding the two materials.

  As the surface layer 17 and the film 21, the material used for the base film 5 can be used.

  As the adhesive material constituting the adhesive layer 23, various materials such as polyacrylate, nitrile rubber, natural rubber, silicone adhesive, polyvinyl chloride, and aqueous emulsions thereof are used.

  Although it does not specifically limit as the mold release layer 25, Glassine paper etc. are used.

  Next, how to make the IC tag 1 will be described. First, the antenna coil 7, the short circuit 11, and the connection circuit 13 are formed on the base film 5. After the metal foil and the base film 5 are laminated by a dry laminating method, a resist pattern is formed by a printing method, and an antenna coil 7 is further formed by chemical etching. As another method for forming the antenna coil 7, a method of forming the metal film such as aluminum or copper by performing electroless plating, electrolytic plating, vapor deposition, or the like on the base film 5, and forming the film by a photoetching method, On top of this, a method of directly printing the antenna coil 7 or the like with conductive ink containing particles such as aluminum powder and silver powder is conceivable.

  Next, the IC chip 9 is disposed at a predetermined position of the antenna coil 7 and connected to the antenna coil 7. The inlets 29 are formed by stacking the films 21 and bonding the films 21 and the base film 5 together and performing pressure bonding using pressure-sensitive adhesion. Thereafter, the surface layer 17 and the release layer 25 are formed on the inlet 29. The hole 16 may be drilled before the release layer 25 is formed or after the release layer 25 is formed. The film 21 and the base film 5 may be laminated by hot pressing.

  Further, after the antenna coil 7 and the IC chip 9 are provided on the base film 5, the surface layer 17 and the release layer 25 may be bonded together without the film 21 being aligned.

  Next, a method of using the IC tag 1 according to the first embodiment will be described with reference to FIG. As shown in FIG. 1A, in the IC tag 3a, the short circuit 11a is effective before cutting, and even if a potential difference occurs in the antenna coil 7a due to the electromagnetic field generated by the external device, A current flows through the short circuit 11a and no current flows through the IC chip 9a. Similarly, in the IC tag 3b, no current flows through the IC chip 9b. Therefore, the IC tag 1 cannot be accessed from an external device.

  Thereafter, as shown in FIG. 1B, the IC tag 1 is cut off at the center cut line 15 and separated into the IC tags 3a and 3b, whereby the short circuit 11 is cut and does not function, and the IC chip 9a, A current flows through 9b. Therefore, the IC tag 3a and the IC tag 3b can be accessed from an external device.

  Furthermore, the IC tag 3a or 3b can be attached to various articles by peeling the peeling layer 25 and exposing the adhesive layer 23.

  According to the first embodiment, when the IC tag 3a and the corresponding 3b are used in combination, the IC tags 3a and 3b are not mistaken. Further, it is possible to save the trouble of searching for a corresponding IC tag. Further, it is possible to prevent the IC tag 1 before being cut out from being read mistakenly with the IC tag 3a or 3b after being cut out. Furthermore, modification of the IC tag 1 before use can be prevented.

  According to the first embodiment, the IC tag 1 can be used for entrance / exit management, production process management, verification of access rights for railways and roads, or financial settlement. It can be suitably used for management.

  For example, since the IC tag 1 is composed of the IC tags 3a and 3b, bring the ledger and the IC tag 1 when inspecting the equipment, separate the IC tag 1 and attach the IC tag 3a to the equipment, and the IC tag 3b to the ledger. paste. At this time, it is possible to prevent a mistake that affixes the IC tag 3a for equipment to the ledger and a mistake that affixes the IC tag 3b that should be affixed to another equipment to the equipment by mistake. Further, since the IC tag 1 before cutting cannot be accessed from an external device, it is possible to prevent erroneous reading of the equipment IC tag 3a or the ledger IC tag 3b for the equipment before inspection.

Next, the IC tag 27 according to the second embodiment will be described.
FIG. 4A is a diagram showing the IC tag 27 before separation, and FIG. 4B is a diagram showing the IC tags 29a and 29b after separation. In the following embodiment, the same number is attached | subjected to the element which fulfill | performs the same aspect as IC tag 1 concerning 1st Embodiment, and the duplicate description is avoided.

  As shown in FIG. 4A, the IC tag 27 is formed by connecting an IC tag 29a and an IC tag 29b. The IC tag 29a has the same configuration as the IC tag 3a. However, unlike the IC tag 3b, the IC tag 29b does not have the short circuit 11b, and a part of the antenna coil 7b is disposed in the IC tag 29a beyond the cut line 15.

  Next, a method of using the IC tag 27 will be described with reference to FIG. As shown in FIG. 4A, in the IC tag 29a, the short circuit 11a before cutting is effective, and no current flows through the IC chip 9a. On the other hand, in the IC tag 29b, the antenna coil 7b before cutting is effective, and when a potential difference occurs in the antenna coil 7b due to the electromagnetic field generated by the external device, a current flows through the antenna coil 7b and the IC chip 9b. Therefore, in FIG. 4A before cutting, the IC tag 29a is inaccessible from the external device, and the IC tag 29b is accessible from the external device.

  After that, as shown in FIG. 4B, the IC tag 27 is cut off by the cut line 15 and separated into the IC tag 29a and the IC tag 29b, whereby the short circuit 11a and the antenna coil 7b are cut and do not function. Therefore, a current flows through the IC chip 9a, and no current flows through the IC chip 9b. Therefore, the IC tag 29a can be accessed from the external device, and the IC tag 29b cannot be accessed from the external device.

  According to the second embodiment, the IC tag 27 is attached to the joint portion of the structure, and the IC tag 29b before cutting is read during normal inspection. Thereafter, when the joint portion is damaged by an earthquake or the like and the IC tag 27 is cut, the IC tag 29b becomes unreadable and the IC tag 29a becomes readable. Thereby, even if it does not observe the junction part of a structure directly, the damage condition of a structure can be confirmed by the readability of IC tag 29a, 29b, and an internal damage condition can be confirmed from the outside.

  The IC tags 3a, 3b, 29a, and 29b may have different sizes instead of the same size.

  In particular, it is a technical idea disclosed in the present application to make any one of the IC tags 3a, 3b, 29a accessible from an external device before the IC tag 1 is cut off without providing either the short circuit 11a or 11b. Within the category of

  The preferred embodiments of the IC tag according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

The top view of IC tag 1 concerning a 1st embodiment. The enlarged view of the intersection part of the cut line 15 of the IC tag 1, and the short circuit 11. FIG. The AA sectional view of IC tag 1. FIG. The top view of IC tag 27 concerning a 2nd embodiment.

Explanation of symbols

1, 3 ... IC tag 5 ... Base film 7, 31 ... Antenna coil 9 ... IC chip 11, 12 ... Short circuit 13 ... Connection circuit 15 ... Cut line 16 ... ...... Pole 17 ......... Surface layer 19 ......... Adhesive layer 21 ......... Film 23 ......... Adhesive layer 25 ...... Release layer 27, 29 ......... IC tag

Claims (8)

A first antenna coil; a first IC chip connected to the first antenna coil; a first short circuit connected to the first IC chip and the first antenna coil;
A second antenna coil; a second IC chip connected to the second antenna coil; and a second short circuit connected to the second IC chip and the second antenna coil.
Before the first short circuit is cut, the first IC chip cannot read and write information in the IC by wireless communication,
After the first short circuit is disconnected, the first IC chip can read and write information in the IC by wireless communication,
Before the second short circuit is cut, the second IC chip cannot read and write information in the IC by wireless communication,
The IC tag, wherein after the second short circuit is cut off, the second IC chip can read and write information in the IC by wireless communication. Both ends of the first antenna coil are connected to both ends of the first IC chip,
Both ends of the first IC chip are connected to a first short circuit,
Both ends of the second antenna coil are connected to both ends of the second IC chip,
An IC tag, wherein both ends of the second IC chip are connected to a second short circuit. Has a tear line,
The IC tag according to claim 1 or 2, wherein the cut line passes through the first short circuit and the second short circuit.   4. The information in the IC can be read and written by wireless communication by the first IC chip and the second IC chip by cutting the IC tag according to the cut line. IC tag. A first antenna coil; a first IC chip connected to the first antenna coil; a first short circuit connected to the first IC chip and the first antenna coil;
A second antenna coil, and a second IC chip connected to the second antenna coil,
Before the first short circuit is cut, the first IC chip cannot read and write information in the IC by wireless communication,
After the first short circuit is disconnected, the first IC chip can read and write information in the IC by wireless communication,
Before the second antenna coil is cut, the second IC chip can read and write information in the IC by wireless communication,
An IC tag, wherein after the second antenna coil is cut, the second IC chip cannot read or write information in the IC by wireless communication. Both ends of the first antenna coil are connected to both ends of the first IC chip,
Both ends of the first IC chip are connected to a first short circuit,
An IC tag, wherein both ends of the second antenna coil are connected to both ends of the second IC chip. Has a tear line,
The IC tag according to claim 5 or 6, wherein the cut line passes through the first short circuit and the second antenna coil. By cutting the IC tag according to the cut line,
The first IC chip can read and write information in the IC by wireless communication,
8. The IC tag according to claim 7, wherein the second IC chip cannot read and write information in the IC by wireless communication.

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