JP4664038B2 - IC tag with function change means by separation - Google Patents

Description

  The present invention relates to an IC tag provided with a function changing means by separating a part of the tag.

  In recent years, IC tags with antennas and IC chips on insulators such as paper and plastic, and readers that communicate with IC tags for the purpose of merchandise distribution and inventory management, checkout processing at stores, and theft prevention For example, a tag system such as that shown in FIG. As shown in FIG. 8, typical IC tags used in this tag system include an RF unit, a modulation / demodulation unit, a data storage unit, which uses radio waves for communication between the reader / writer device 250 and the tag, There is a non-contact type IC tag (RFIC tag) 200 constituted by an IC 20 (210) including the antenna 201 and an antenna 201. Description of other members is omitted.

  FIG. 9 is a perspective view showing an example of the structure of a general IC tag. As shown in FIG. 9, the RFIC tag is configured by laminating a coil antenna 201 and an IC chip 210 on an insulating substrate 90 such as paper or plastic. Thus, the IC tag has a relatively simple configuration.

JP-A-9-62934

  Due to the nature of the tag used by being attached to a product, an IC tag represented by the RFIC tag described in the background art is required to be small and light. For this reason, the circuit configuration of the IC mounted on the IC tag has to be a simple configuration, and it has been difficult to mount hardware and software for preventing data tampering on the IC. For this reason, the conventional IC tag has a problem that it is easy to falsify data.

  An object of the present invention is to prevent data tampering and improve security in an IC tag. Another object of the present invention is to provide a tag structure suitable for various applications.

  According to the present invention, a separable portion is provided in an IC tag, and the separable portion is separated from the tag, thereby changing restrictions on data input to the IC tag and data output from the IC tag, thereby preventing data from being falsified. It is possible to change the function of the IC tag such as changing the signal processing performed by the IC tag or automatically updating or changing stored data without using a reader / writer device.

  By linking the change in the appearance of the IC tag and the change in the function of the IC tag, a person can visually grasp the state of the function of the IC tag.

  Further, the shape and dimensions of the signal line, the bias line, and the like to be cut and the layout thereof are devised by separating the separation part (when the external impact is applied, the signal line, the bias line, etc. are easily cut. On the contrary, the signal line, the bias line, etc. are not cut unless the cut-off portion is completely cut off.) This improves the usability according to the use and characteristics of the object to which the IC tag is attached.

  For example, the IC tag separation part is an IC tag whose function changes with the separation, and an IC tag having a wiring pattern in which electrical separation does not occur only by partly separating the separation part.

  In addition, an IC tag having a wiring pattern in which a functional change is caused by the separation, and an electrical separation is caused when a part of the separation part is separated.

  It is an IC tag in which a function change is caused by the detachment, and the detachment part is changed by a change in the condition to be electrically separated.

  According to the present invention, it is possible to easily change the function of an IC tag without using mechanical means, which could not be realized with a conventional single-function IC tag, by separating a separable part from the IC tag. realizable. By separating the separable part, the appearance of the IC tag can be changed, and the state of the RFIC tag can be grasped visually. Security against data tampering can be improved by providing data input / output restrictions according to the tag separation state.

  By sharing the function of the tag among a plurality of ICs, the security can be improved by preventing an appropriate function change unless the separable parts are separated in order.

 It is possible to obtain an effect that could not be easily obtained with a conventional IC tag, such as the ability to use the separated separable part as an independent IC tag.

  Further, by devising the configuration of the wiring and the like of the separable part, the usability at the time of separating the IC tag can be improved. Further, by changing the material of the IC tag separation part, the function of the IC tag can be changed due to a change in the external environment. In this way, the use of the IC tag can be improved by adopting various configurations depending on the application.

  Hereinafter, an IC tag according to an embodiment will be described with reference to the drawings. FIG. 1 shows a configuration diagram of an IC tag whose function is changed when the number n of detachable portions from the tag main body is separated from the detachable portions, which is a precondition of the invention of this application, where n = 2.

  FIG. 1 is a diagram illustrating a configuration example of an IC tag whose function is changed by separating a separable part when the number n of separable parts from the tag body is n = 2. The IC tag shown in FIG. 1 is composed of three parts: A1 and A2 parts that can be separated and a non-separable part B (tag body). Portions A1, A2, and B are antenna 1, antenna 2, and antenna as interfaces of IC1, IC2, and IC3, respectively, and the tag and the outside (reader / writer device that exchanges data between tags). 3 is provided.

  IC1 (10) and IC2 (20) are signal transmission lines L1 for signal transmission between IC1 (10) and IC2 (20), and IC2 (20) and IC3 (30) are IC2 (20) and IC2 (20). Signal lines L2 for signal transmission between the IC3 (30) are connected to each other. The signal line L1 is wired so as to be disconnected when A1 is disconnected from the tag body. Similarly, the signal line L2 is also wired with a layout that is disconnected when A2 is disconnected from the tag body. ing.

  When the lines SL12 and SL21 connected to the common GND from the IC1, IC2 and IC3 are disconnected from the tag body, the lines SL23 and SL32 are connected when the A2 section is disconnected from the tag body. In addition, they are laid out and wired so as to cross the boundary line for separating A1 and A2 or the boundary line for separating A2 and B so as to be cut off. Lines SL12, SL21, SL23, and SL32 are disconnection determination lines that are provided to detect changes in the impedance of the line caused by the line disconnection and to be used for determining the disconnection of the A1 part or the A2 part.

  2 is a perspective view showing a three-dimensional structure of the IC tag shown in FIG. As shown in FIG. 2, the IC tag according to the present embodiment is provided on an insulating substrate 90 such as paper or plastic. A common GND line 91 is provided along one side of the insulating substrate 90. The common GND line 91 grounds the ICs 1, 2, and 3, and also grounds the lines SL12, SL21, SL23, and SL32.

  FIG. 3 is a block diagram illustrating a configuration example of the IC1 (10). As shown in FIG. 3, IC1 (10) receives and transmits a signal to power supply circuit 11 that converts a part of the received signal from the antenna into power and antenna 1 that is an external interface of the tag. Transmission / reception circuit 12, modulation circuit 13 that modulates encoded data, demodulation circuit 14 that demodulates a reception signal, encoding / decoding circuit 15 that encodes transmission data and decodes reception data, and encoding / decoding circuit 15 or a data processing circuit 1 (16) for processing data sent via the signal line L1, a storage device 1 (18), a data processing circuit 1 (16), and a storage device 1 (18). The control circuit 1 (17) for controlling the operation according to the state of the tag and the part A1 itself determines whether or not the part A1 is separated from the part A2. It has a disconnection judging circuit 2 (19), the. The power supply circuit 11 is connected to the common power supply line, the data processing circuit 1 (16) is connected to the line L1 connecting the IC (1) and IC (2), and the A1 disconnection determination circuit 2 (19) is connected to the line SL12. It is connected.

  FIG. 4 is a diagram illustrating a configuration example of the IC 2 (20). As shown in FIG. 4, the IC 2 (20) includes a power supply circuit 11 that converts a part of the received signal into electric power, and a transmission / reception circuit 12 that receives and transmits the signal to the antenna 2 that is an external interface of the tag. A modulation circuit 13 that modulates the encoded data, a demodulation circuit 14 that demodulates the received signal, an encode / decode circuit 15 that encodes and decodes the data, and a data processing circuit 2 (21) that processes the data A control circuit 2 (22) for controlling the operations of the storage device 2 (23), the data processing circuit 2 (21) and the storage device 2 (23) according to the state of the tag, and a portion A1 is a portion A2. “A1 disconnection determination circuit 1” (24) for determining whether or not the part A2 is disconnected from the part B, and the part A2 itself determines whether or not the part A2 is disconnected from the part B “ Has a 2 disconnect determination circuit 2 "(25), the.

  FIG. 5 is a functional block diagram showing a configuration example of the IC3 (30). As shown in FIG. 5, IC3 (30) receives and transmits a signal to power supply circuit 3 (11) that converts a part of the received signal into power and antenna 3 that is an external interface of the tag. A transmission / reception circuit 12, a modulation circuit 13 for modulating encoded data, a demodulation circuit 14 for demodulating a received signal, an encoding / decoding circuit 15 for encoding and decoding data, and a data processing circuit 3 for processing data (31), the storage device 3 (33), the control circuit 3 (32) for controlling the operation of the data processing circuit 3 (31) and the storage device 3 (33) according to the state of the tag, and the part A2. And “A2 disconnection determination circuit 1” 34 for determining whether or not is disconnected from the part B.

  FIG. 6A is a functional block diagram illustrating a configuration example of the A1 disconnection determination circuit 1 (24) of the IC2 (20). As shown in FIG. 6a, the A1 disconnection determination circuit 1 (24) includes a signal line L1 disconnection determination circuit 1 (40) and an impedance change detection circuit 1 (50) that detects a change in impedance of the line SL21. Has been.

  The signal line L1 disconnection determination circuit 1 (40) collates the identification data sent from the IC1 (10) via the signal line L1 with the collation data 42, and the signal line as shown in Table 1a. If the identification data sent from the IC 1 via L1 matches the verification data 42, “0” is output, and if the identification data and the verification data 42 do not match, “1” is output. Is output.

Similarly, an “impedance change detection circuit 1” 50 that detects a change in impedance of the line SL21 detects whether or not the line SL21 is grounded to the common GND. As shown in Table 1a, the line SL21 is detected. Is output to “0” when grounded to the common GND, and “1” is output when the line SL21 is cut open.
The A1 disconnection determination circuit 1 (24) calculates the logical product of the output of the “signal line L1 disconnection determination circuit 1” and the output of the “impedance change detection circuit 1” as shown in Table 1a. When this logical product is “1”, it is determined that A1 is separated from the tag.

  The determination of disconnection of the signal line L1 may employ a method of collating data stored in advance in the IC1 (10) and IC2 (20) as identification data and collation data, respectively. Any verification data is transmitted from the IC 2 (20) to the IC 1 (10) via the signal line L1, and the arbitrary verification data received by the IC 1 (10) is returned as identification data. A method of collating in the L1 separation determination circuit 1 ”40 may be employed.

  In the description of the operation of the A1 disconnection determination circuit 1 (40), the AND circuit 54 calculates the logical product of the output of the “signal line L1 disconnection determination circuit 1” 40 and the output of the “impedance change detection circuit 1” 50. When the logical product is “1”, it is determined that A1 is separated from the tag. However, the determination method is not limited to this. For example, when the logical sum of the output of the “signal line L1 disconnection determination circuit 1” 40 and the output of the “impedance change detection circuit 1” 50 is “1”, that is, the signal line L1 or the line SL21. When one of them is cut, a method of determining that the portion A1 is cut from the tag main body may be adopted. In this case, an OR circuit is used instead of the AND circuit 54.

  For example, in FIG. 6A, in the AND circuit 53, two inputs are shared. Before the disconnection line 1 is disconnected, the line SL21 is not disconnected and is at the GND potential. Therefore, the two inputs of the AND circuit 53 are also “0”, and the output is “0”. On the other hand, when the disconnection line 1 is disconnected, the line SL21 is also disconnected, so that the two inputs of the AND circuit 23 are “1” and the output is R2 × Vcc / R1 × R2 (this is “1”). In this way, the impedance of the SL 21 can be detected, and the disconnection can be detected.

  The configurations of the remaining three separation determination circuits other than the A1 separation determination circuit 1 (24) are shown in FIGS. 6b, 6c, and 6d, and the separation determination tables of each separation determination circuit are shown in Tables 1b, 1c, and Shown in 1d. The configuration and operation principle of the three disconnection determination circuits are basically the same as those of the A1 disconnection determination circuit 1 described above, and a description thereof is omitted here.

  7a, 7b, and 7c are functional block diagrams illustrating configuration examples of the storage device 1 (18), the storage device 2 (23), and the storage device 3 (33).

  As shown in FIG. 7a, the storage device 1 (18) includes a storage area 1 (64) from the data processing circuit 1 (16), a write control circuit 61, a read control circuit 62, and a read dedicated circuit 63. Yes. The write control circuit 61 stores the write data from the data processing circuit 1 (16) based on the operation of the first function of the IC tag based on the control data of the write request from the control device 1 in the storage area 1 (64). To record. The read-only circuit 62 prevents data from being written to the storage area 1 (64) based on the control data of the read-only request from the control circuit 1 (17). As a result, data cannot be written, and the storage device 1 (64) is read-only. The read control circuit 62 sends the data recorded in the recording area 1 (64) to the data processing device 3 (31) based on the control data of the read request from the control device 1 (17).

  FIG. 7 b is a diagram showing a configuration of the storage device 2 of the IC 2. As shown in FIG. 7b, the storage device 2 (23) is configured in the same manner as the storage device 1 (18), and a recording write process based on the operation of the second function in the storage area 2 (65). And read processing and read-only processing are performed.

  FIG. 7 c is a diagram illustrating a configuration example of the storage device 3 (33) of the IC 3. As shown in FIG. 7c, the storage device 3 (33) performs the same processing as the storage device 1 (18) with respect to the writing process, the reading process, and the read-only process. However, the storage device 3 (33) performs the operations of the first function and the second function respectively controlled by the IC1 and IC2, in addition to the storage area 3 (66) for recording data based on the operation of the third function. It consists of a storage area 1 (64) and a storage area 2 (65) for recording.

The IC tag shown in FIG. 1 is processed along the distribution process as follows. 1) With part A1, part A2, and part B all together, data such as product identification code, serial number, date of manufacture, and shipping date are input to the tag (stored in the storage device), and the product Attach to 2) The part A1 is separated from the tag at the time of factory shipment and shipped to the dealer. Here, the separated part A1 is left as a shipment source copy. 3) At the store, enter data such as the date and time of sale and the store name. After that, the part A2 is cut off, and the product with the tag having only the part B is given to the purchaser. At this time, the separated part A2 is left as a store copy. 4) The tag of only part B delivered to the purchaser together with the product becomes a purchaser's copy.
Table 2 shows an example of the correspondence between the tag state change and the accompanying tag function change when the tag according to the present embodiment is used for such merchandise distribution management.

  In Table 2, IC1 (10) controls all the control for realizing the first function, and IC2 (20) controls all the control for realizing the second function. That is, at the time of shipment from the factory, the IC 1 (10) specifies the communication control outside the tag, the communication with the IC 2 (20) and the IC 3 (30), and the address of the storage area 1 from the storage devices 1 to 3. It has a function including sending a command to write data 1 to the storage area 1 from the devices 1 to 3, writing and reading data 1 to the storage area 1 of the storage device 1, and thereby a product identification code, The first function of inputting / outputting data (data 1) such as a manufacturing number, a manufacturing date, and a shipping date and time is exhibited. The IC2 (20) includes functions including communication with the IC1 and IC3, sending of a write prohibition instruction to the storage device 3 other than the storage region 1 to the storage device 3 of the IC3 (30), and writing of data 1 to the storage region 1 of the storage device 2. have. The IC 3 (30) has functions including communication with the IC 1 (10) and the IC 2 (20) and writing of data 1 to the storage area 1 of the storage device 3.

  In the store, the part A1 is separated, and the IC 2 (20) controls communication with the outside of the tag, communicates with the IC 3 (30), specifies the address of the storage area 2 of the storage devices 2 and 3, and the storage device 2 The functions include writing and reading data 2 to and from the storage area 2 and read-only storage area 1 of the storage device 2 (read only). The second function including input / output of data such as store name (data 2) is exhibited.

  The IC 3 (30) communicates with the IC 2 (20), makes the storage area 1 of the storage device 3 read-only, and writes the data 2 to the storage area 2 of the storage device 3.

  In the purchaser (after purchase), the parts A1 and A2 are separated, and the IC (30) is separated from A2, communication control with the outside of the tag, read-only storage of the storage areas 1 and 2 of the storage device 3 (read) Only), it has the function of writing and reading data 3 to and from the storage area 3 of the storage device 3, and outputs data 1 and data 2 and arbitrary data (data 3) such as notes by the purchaser. The third function including input and output is exhibited.

  Read-only is performed after a certain area is separated in each IC tag, part of the functions that the separated tag was responsible for (such as writing information to a storage area dedicated to that tag) This is because it is preferable to prevent this.

  On the other hand, as shown in Table 3, a part of the control function for realizing the first function is IC1 (10) and IC2 (20), and a part of the control function for realizing the second function is IC2 ( 20) and IC3 (30) may be assigned to each other. Further, the IC 2 may inhibit the writing of data to the storage area 3 of the storage device 3 as the third function.

  That is, at the time of shipment from the factory, the IC 1 (10) controls communication with the outside of the tag, communicates with the IC 2 and IC 3, sends a command to write data 1 from the storage device 1 to the storage area 1 of the storage 3, and the storage device 1. The data 1 is written to and read from the storage area 1, and the IC 2 (20) communicates with the IC 1 and IC 3, specifies the addresses of the storage areas 1 to 3 of the storage devices 1, and the storage area to the storage device 3 of the IC 3. A write prohibit command is sent to other than 1, and data 1 is written to the storage area 1 of the storage device 2. As is clear from comparison with the case of Table 2, a part of the function (first function) of the IC1 (10) is assigned to the IC2 (20).

  When the function for realizing one function as shown in Table 3 is distributed to a plurality of ICs, if the tag including ICs is disregarded in the order of separation and the tags do not operate normally, they are not usable, This has the effect of preventing unauthorized use.

  In the above embodiment, the tag and the external information are exchanged using a non-contact type using radio represented by radio waves. However, the present invention is not limited to this, and a contact type is adopted. May be.

  Hereinafter, the shape of the IC tag according to the present embodiment will be described. FIG. 10 is a diagram illustrating an example of the shape of the IC tag. The IC tag shown in FIG. 10 (a) is an example of an IC tag in which a cut (through hole and / or end cut) is made in an insulating substrate, and FIG. 10 (b) is changed to a material that can be easily split. FIG. 10C shows an example of an IC tag in which IC tags are overlapped and connected. The example of FIG. 10A includes a tag A, a tag B, and a tag C. When the tag is separated, the tag A is separated along the perforation line 103 of the separation line.

  The IC tag shown in FIG. 10B is also composed of three tags A to C as in the IC tag of FIG. The difference from the IC tag shown in FIG. 10 (a) is that the example of FIG. 10 (a) uses the perforation 103 as a separating line, whereas FIG. In this example, the material 101a of the substrate 101 in the vicinity of the separation line B, tag B, and tag C is changed from the material of the substrate 101 so that the material can be separated along the separation line.

Examples of the materials 101 and 101a include the following.
101: paper with coating, 101a: paper without coating.
101: Vinyl material, 101a: Paper material.
101: A material with high tensile strength, 101a: A material with low tensile strength.

  FIG. 10C is a diagram showing an example in which tags are connected in the vertical direction, whereas the examples in FIGS. 10A and 10B are connected in the horizontal direction. In the example of FIG. 10C, the surface of the wiring is connected by bonding or the like at the connection portion 105 at the left end. In the example of FIG. 10C, when the tag is separated, the uppermost tag is peeled off from the lower tag for use. As described above, when the tag portion is separated, the method of separation differs depending on the initial connection state.

  When the tag according to the present embodiment is used in an actual usage environment, a part of the separation part may be cut due to inadequate handling of the tag. For example, when the cut portion overlaps the position of the wiring L91 that connects IC1 (111) and IC2 (112) shown in FIG. 11, the wiring L91 is cut. If the wiring L91 is disconnected, the function of the tag unintended by the user occurs due to the above-described tag configuration, resulting in inconvenience in use. FIG. 11 also shows an example in which the arrangement of the wiring is devised to cope with such a problem. As shown in FIG. 11, the tag A and the tag B are provided with a first wiring L91 and a second wiring L92 having different distances from the end of the substrate. As a result, even if one of the wirings (the first wiring L91 in FIG. 11) is cut for some reason, it is not determined that the wiring has been cut because another wiring L92 exists. Accordingly, it is possible to prevent erroneous determination regarding tag separation due to damage or the like.

  In the structure shown in FIG. 12, the tag A and the tag B are connected by the wiring L117, and the covering 117 with the metal wiring is also formed around the separation line 115 (perforation). It is considered that unintentional cutting tends to occur in the vicinity of the separation line 115. Since the wiring L101 is connected by the covering 117 in the vicinity of the disconnection line 115, even if an unintentional disconnection occurs in the vicinity of the end of the disconnection line 115, for example, the wiring L101 itself is electrically connected. The disconnection of the wiring L117 is detected only when the disconnecting line 115 is completely disconnected.

  FIG. 13 is a diagram illustrating another example of the wiring pattern. In the wiring pattern shown in FIG. 13, in addition to the wiring L127 connected between IC1 and IC2, a second wiring L121 is provided so as to surround the hole 125a of the separation line 125. Also in this structure, similarly to the structure shown in FIG. 12, it is possible to prevent erroneous detection of disconnection of the wiring L127 due to partial disconnection in the vicinity of the disconnection line 125.

  The structure shown in FIG. 14 shows an example in which the wiring between IC1 and IC2 is connected in a plane. FIG. 14 is an exploded view of a configuration for connecting two tags. On the left side of the separation line 135, the IC 1 (131) and the antenna 133 constituting the tag A are mounted on the first base 130 in FIG. An IC (2) 141 and an antenna 143 constituting the tag B are mounted on the base 140 in FIG. The tag A and the tag B are connected to each other by a wiring 151 formed on the sheet 150 shown in FIGS. 14B and 14C and a wiring 155 formed on the sheet (insulating film) 153. That is, the four-layered structure shown in FIGS. In this example, the case where the number of tags is two is shown, but the same configuration can be made even when the number of tags is three or more.

  Regarding another connection form of the IC tag according to the present embodiment, the configuration shown in FIG. 15 is a form in which the IC tags are used in an overlapping manner. Tag A, tag B, and tag C are composed of insulating substrates 161, 163, 165, IC1 (161a), IC2 (163a), IC3 (165a), antennas 161b, 163b, 165b, and wiring patterns 161c-1, 161e- 2, 163c-1, and 165c-1. The tag A, the tag B, and the tag C are connected to each other at the end connection portion 167. Each tag is formed on the wiring 161c-2, the wiring 163c-1, and the wiring 165c-1 in the substrates 161d, 163d, and 165d. When the tag A is removed from the tag B (turns 161e), the connection portion At 167, electrical connection is lost and disconnection is performed. The same applies to tag B and tag C below.

  FIG. 15 shows an example in which the connection surface 167 is disposed at the left end, but the position of the connection portion 167 is not limited. For example, the entire portion where the tags overlap may be used as the connection surface.

  FIG. 16 is a diagram illustrating an example of a wiring configuration of an overlay IC tag. FIG. 16A is a diagram illustrating a configuration example of the tag A. IC1 (171) and antenna 173 constituting the tag A are formed on the insulating substrate A170, and wiring patterns L401A, L402A, and L403A connecting the IC1 (171) and the left end portion are disposed. FIG.16 (b) is an insulating film and the pattern is not formed. FIG. 16C is a diagram illustrating a configuration example of the tag B. FIG. 16C illustrates the IC 2 (181), the antenna 183, and the wiring patterns L401B to L403B on the insulating substrate B180 similarly to the tag A. Is arranged.

  Tag A is placed on top of tag B. The tag A and the tag B are insulated by an insulating film shown in FIG. The wirings L401A and L401B of the tag A and tag B are electrically connected at the connection portions 175 and 183, respectively. That is, the insulating sheet 177 has an area that insulates between the insulating substrate A170 and the insulating substrate B180 excluding the connecting portions 175 and 183, and connects the L402A and L401B, and the L403A and L403B at the connecting portions 175 and 183. The wirings from IC1 (171) and IC2 (181) are branched into a plurality of (here, three) wirings, and each connection line has a plurality of connection points.

  The tag A and the tag B are bonded to the insulating substrate with an adhesive or the like, but the adhesion at the connection portions 175 and 183 is peeled off due to the adhesive force or time change of the adhesive, and the electrical connection between the tag A and the tag B May disappear. Therefore, as shown in FIG. 16, the connection between L401A and L401B is performed at a plurality of locations, and the electrical connection is maintained unless all the connections are disconnected. The same applies to L402A and L402B, and L403A and L403B. In the connection form shown in FIG. 16, disconnection is not performed unless all the contacts at the three connection points are lost in each wiring. In the present embodiment, the wiring patterns are all arranged regularly and evenly, but irregular and non-uniform arrangements are also possible.

  Next, a tag according to the second embodiment of the present invention that considers application to distribution management will be described. In the present embodiment, it is possible to use for another purpose by adopting a configuration in which the detachment portion is intentionally easily detachable. In addition, when transporting goods that are sensitive to shaking such as precision machinery and chemicals, care must be taken during handling. In the present embodiment, a method that can cause a functional change by partial breakage when a force is applied to the separation part of the tag will be described. FIG. 17 shows a diagram in which the wirings 500 in the separation part 191 provided on the substrate 190 are arranged in a zigzag so as to be suitable for the above-described purpose of facilitating cutting. When the wiring 500 is arranged in a zigzag pattern, the wiring becomes long. When a part of the connection point of the separation line 191 is cut off, wirings (501 to 503) for connecting IC1 (192-a) and IC2 (193-a) are formed. Since it is cut, the probability increases.

  FIG. 18 is a diagram showing an example in which the IC tag according to the embodiment of the present invention is applied to the bottle seal. The IC tags 310, 313, and 315 are attached with separation lines 310a, 313a, and 315a at the boundary between the bottle 305 and its lid 303.

  FIG. 19 shows an example of the IC tag 310 attached to the bottle 305 in FIG. The IC tag 310 includes two tags, a tag A and a tag B. Tag A and tag B are connected to each other through a disconnecting portion 310a. In the separation part 310a, all the wirings connecting the tag A and the tag B pass. The material is selected so that the electrical connection of the connection reacts with the contents of the bottle and is cut. For example, by using a material that reacts and dissolves the material of the separation part with the contents contained in the bottle, and wiring that passes through the separation part with conductive ink that disappears together with the material of the connection part, the separation part 310a The wiring may be made of a material that reacts with the substance of the contents of the bottle to increase the electrical resistance. A plurality of bottles attached with IC tags are simultaneously stored in a packing box 308 (FIG. 18). By using a tag reader that can read a plurality of IC tags at the same time and confirming whether or not the function of the IC tag has changed, it is possible to confirm breakage of the bottle and leakage of contents without opening the packing box 308.

  As described above, in the IC tag according to the present embodiment, it is possible to easily change the function of the IC tag without using a machine, which cannot be made a conventional single-function IC tag by separating the separable part. realizable. By separating the separable part, the appearance of the IC tag can be changed, and the state of the RFIC tag can be grasped visually. Security against data tampering can be improved by providing data input / output restrictions according to the tag separation state. By sharing the function of the tag among a plurality of ICs, the security can be improved by preventing an appropriate function change unless the separable parts are separated in order. The separable and separable part can be used as an independent IC tag.

  Also, by devising the layout of the wiring of the separable part, the usability at the time of IC tag separation can be improved, and by changing the material of the separation part, the function of the IC tag can be changed due to changes in the external environment I can do it.

  The tag of the present invention can be applied to a merchandise distribution process. Changing the structure related to separation makes it useful in suitable application fields.

It is a top view which shows the block diagram of the IC tag whose number n of the parts which can be separated from the tag main body by embodiment of this invention is n = 2. It is a perspective view which shows the three-dimensional structure of the IC tag of FIG. It is a functional block diagram which shows the structural example of IC1. It is a functional block diagram which shows the structural example of IC2. It is a functional block diagram which shows the structural example of IC3. 3 is a functional block diagram illustrating a configuration example of an A1 disconnection determination circuit 1. FIG. 3 is a functional block diagram illustrating a configuration example of an A1 disconnection determination circuit 2. FIG. 3 is a functional block diagram illustrating a configuration example of an A2 disconnection determination circuit 1. FIG. 3 is a functional block diagram illustrating a configuration example of an A2 disconnection determination circuit 2. FIG. 3 is a functional block diagram illustrating a configuration example of a storage device 1. FIG. 3 is a functional block diagram illustrating a configuration example of a storage device 2. FIG. 3 is a functional block diagram illustrating a configuration example of a storage device 3. FIG. It is a figure which shows the structural example of the management system using the conventional IC tag. It is a perspective view which shows the structure of IC of the conventional IC tag. It is a figure shown about the shape of the IC tag by this Embodiment, FIG. 10 (a) is an example of the IC tag which made the notch | incision in the insulated substrate, FIG.10 (b) changed the cut part into the material which is easy to tear. FIG. 10C shows an example of an IC tag in which IC tags are overlapped and connected. It is a figure which shows the positional relationship of the cutting | disconnection point of tag A and tag B, and wiring. It is a figure which shows the 1st connection pattern structural example of the wiring between the tag A and the tag B. FIG. It is a figure which shows the 2nd connection pattern structural example of the wiring between tag A and tag B. FIG. It is the figure which showed the example in the case of connecting the wiring between IC1 and IC2 in plane, and decomposed | disassembled and looked at the structure which connects two tags. In this mode, IC tags are used in an overlapping manner. It is a figure which shows the wiring structural example of a superimposition IC tag. It is a figure which shows the structural example of the wiring which makes a cutting | disconnection easy. It is a figure which shows the example at the time of applying the IC tag by embodiment of this invention to the seal of a bottle. It is a figure which shows the example of the IC tag stuck on a bottle in FIG.

Explanation of symbols

A1, A2: IC tag detachable part, B: Non-detachable part (tag body), 1, 2, 3, ... antenna, 10 ... IC1, 20 ... IC2, 30 ... IC3, L1, L2 ... signal line .

Claims (5)

A detachable portion from A1 to An that can be separated by a separation line of the substrate and n (n is a natural number of n> 1) provided on the substrate;
It is composed of a part An + 1 other than the separable part from A1 to An,
The Ak (k is a natural number of 1 ≦ k ≦ n) is ICk and an interface for the ICk to communicate with the outside.
The An + 1 includes ICn + 1 and an interface for the ICn + 1 to communicate with the outside.
A signal line Lk that electrically connects between the ICk and ICk + 1 and is disconnected when the Ak is disconnected,
The ICk is
A communication circuit for communicating with the outside via the interface;
A data processing circuit for processing data sent to the communication circuit or the signal line to execute a certain function;
A storage device for storing data via the data processing circuit;
A control circuit for controlling restrictions on reading and writing of the data with respect to the storage device, depending on a tag separation state;
A first Lk disconnection detecting device for detecting disconnection of the signal line Lk;
A detection result of the presence or absence of disconnection of the signal line Lk includes a first Ak disconnection determination device used for determination of disconnection of the Ak,
The Ak separation state determined by the first Ak separation determination device is transmitted to the control circuit of ICk,
The control circuit changes the read / write restriction of data in the storage device of ICk according to the state of disconnection of Ak,
ICk + 1 is
A second Lk disconnection detection device for detecting disconnection of the signal line Lk;
A detection result of the presence or absence of disconnection of the signal line Lk includes a second Ak disconnection determination device used for determination of disconnection of the Ak,
The state of Ak separation determined by the second Ak separation determination device is transmitted from ICk + 1 to the control circuit of ICn + 1,
The restriction of data read / write in the storage device from ICk + 1 to ICn + 1 is changed by the control circuit according to the state of Ak being separated, and the function of the tag on the side including the portion An + 1 is changed based on the restriction. In the IC tag
The IC is characterized in that the wiring pattern of the signal line Lk is a first wiring pattern in which electrical disconnection does not occur in the signal line Lk by partial disconnection of Ak by a disconnection line provided on a substrate. tag. The first wiring pattern is a wiring pattern in which the signal line Lk branched into a plurality intersects with an Ak separation line provided on the substrate at different positions on the substrate. The IC tag according to 1. 3. The separation line of the substrate has holes provided intermittently in a separation direction, and the first wiring pattern is disposed avoiding the holes. The IC tag described in 1. A detachable portion from A1 to An that can be separated by a separation line of the substrate and n (n is a natural number of n> 1) provided on the substrate;
It is composed of a part An + 1 other than the separable part from A1 to An,
The Ak (k is a natural number of 1 ≦ k ≦ n) is ICk and an interface for the ICk to communicate with the outside.
The An + 1 includes ICn + 1 and an interface for the ICn + 1 to communicate with the outside.
A signal line Lk that electrically connects between the ICk and ICk + 1 and is disconnected when the Ak is disconnected,
The ICk is
A communication circuit for communicating with the outside via the interface;
A data processing circuit for processing data sent to the communication circuit or the signal line to execute a certain function;
A storage device for storing data via the data processing circuit;
A control circuit for controlling restrictions on reading and writing of the data with respect to the storage device, depending on a tag separation state;
A first Lk disconnection detecting device for detecting disconnection of the signal line Lk;
A detection result of the presence or absence of disconnection of the signal line Lk includes a first Ak disconnection determination device used for determination of disconnection of the Ak,
The Ak separation state determined by the first Ak separation determination device is transmitted to the control circuit of ICk,
The control circuit changes the read / write restriction of data in the storage device of ICk according to the state of disconnection of Ak,
ICk + 1 is
A second Lk disconnection detection device for detecting disconnection of the signal line Lk;
A detection result of the presence or absence of disconnection of the signal line Lk includes a second Ak disconnection determination device used for determination of disconnection of the Ak,
The state of Ak separation determined by the second Ak separation determination device is transmitted from ICk + 1 to the control circuit of ICn + 1,
The restriction of data read / write in the storage device from ICk + 1 to ICn + 1 is changed by the control circuit according to the state of Ak being separated, and the function of the tag on the side including the portion An + 1 is changed based on the restriction. In the IC tag
The IC tag is characterized in that the detachable portion Ak has a second wiring pattern so that the signal line Lk is electrically disconnected only by being partly separated by the separation line. . The signal line Lk is, so as to intersect disconnecting lines and a plurality of times of the detachable portion Ak provided on a substrate, according to claim 4, further comprising a wiring pattern which meanders along the disconnect line IC tag.

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