JP2007065822A - Radio ic tag, intermediate ic tag body, intermediate ic tag body set and method for manufacturing radio ic tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio IC tag for simplifying the read/write test of an IC chip, and for simplifying the manufacturing process of a radio IC tag and for reducing manufacturing costs. <P>SOLUTION: A radio IC tag 101 is provided with an intermediate IC tag body 104 having an IC chip 102 and an intermediate antenna 103 configured of a pair of copper thin wires 108 extended from the both sides of the IC chip 102 and a main antenna 106 configured of a pair of antenna patterns 112. The intermediate antenna 103 of the intermediate IC tag body 104 is overlapped on the main antenna 106 so that the intermediate antenna 103 can be connected to the main antenna 106 by radio. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless IC tag capable of reading and writing information by wireless communication.

  In recent years, wireless IC tags have been used to manage information such as product inventory information and various fee information. The wireless IC tag can store a large amount of information, and can read and write information in a non-contact state, that is, in a state in which the wireless IC tag is close to the reader or writer. high.

  A conventional wireless IC tag includes an IC chip that stores various types of information and an antenna for performing wireless communication. In the conventional wireless IC tag, reading of information from the IC chip and writing of information to the IC chip are performed by wireless communication using an antenna (see, for example, Patent Document 1).

In conventional wireless IC tags, wireless communication has been mainly performed using radio waves in a short wave band (3 MHz to 30 MHz). In particular, wireless IC tags using radio waves of 13.56 MHz have recently become mainstream and are adopted as the global standard ISO15693. In addition, the wireless IC tag in the future is not only required to be further reduced in size, but also required to be further reduced in cost in response to a request from the Ministry of Economy, Trade and Industry. In addition, with the revision of the Radio Law, the development of wireless IC tags using radio waves in the higher frequency UHF band (300 MHz to 3 GHz) is expected.
JP 2003-44817 A (page 3-5, FIG. 1)

  However, in the conventional wireless IC tag manufacturing process, when an antenna is formed, the antenna is formed on the substrate by an etching method. When the antenna is connected to the electrode of the IC chip, the antenna is electrically connected to the electrode of the IC chip by an anisotropic conductive film method (ACF method). For this reason, the manufacturing process of the wireless IC tag is complicated, and the manufacturing cost tends to be high.

  Conventionally, a read / write test has been performed in which a wireless IC tag of a finished product is inspected by performing wireless communication in a non-contact state to check whether there is a defect in the information reading function, writing function, and information communication function of the IC chip. Has been done. When a defect of the IC chip is found in the inspection after completion of the wireless IC tag, the defective wireless IC tag is discarded. Therefore, the yield of the wireless IC tag is lowered, and as a result, it is difficult to keep the manufacturing cost low.

  Therefore, it is conceivable to perform a read / write test for the IC chip before the antenna is connected. However, since the conventional wireless IC tag cannot perform wireless communication in a non-contact state only with the IC chip, it is necessary to perform inspection by bringing the electrode of the tester into contact with the electrode of the IC chip. Therefore, it takes time to read / write the IC chip, and as a result, the manufacturing cost increases.

  The present invention has been made in view of the above-described problems, and can simplify the manufacturing process of the wireless IC tag, facilitate the read / write test of the IC chip, and reduce the manufacturing cost. The purpose is to provide.

  In the wireless IC tag of the present invention, an intermediate IC tag body having an IC chip and an intermediate antenna composed of a pair of conductive wires extending from both sides of the IC chip, and the intermediate antenna are overlapped and wirelessly connected. And the present antenna configured by a pair of antenna patterns.

With this configuration, since the intermediate antenna is formed of a conductive wire, the intermediate antenna can be easily connected to the IC chip by, for example, resistance welding. Moreover, this antenna is comprised by the antenna pattern, and an intermediate | middle antenna and this antenna are wirelessly connected by overlapping an intermediate antenna on this antenna. Therefore, the intermediate antenna and the main antenna can be easily connected, the manufacturing process of the wireless IC tag is simplified, and the manufacturing cost can be kept low.
Further, since the intermediate antenna is provided on both sides of the IC chip of the intermediate IC tag body, wireless communication can be performed in a non-contact state only with the intermediate IC tag body. Therefore, the IC chip read / write test can be easily performed in a state where the intermediate IC tag body is just brought close to the reader or writer. Thereby, before connecting an intermediate IC tag body to this antenna, it is possible to perform a read / write test of an IC chip by performing wireless communication in a non-contact state. Therefore, it is possible to find a defect of the IC chip before the completion of the wireless IC tag, suppress a decrease in the yield of the wireless IC tag, and reduce the manufacturing cost.

  In the present invention, it is preferable that the antenna pattern of the antenna is printed on the surface of the base member with conductive ink.

  With this configuration, the antenna can be easily formed by printing the antenna pattern of the antenna on the base member with conductive ink. Therefore, the manufacturing process of the wireless IC tag is simplified, and the manufacturing cost can be kept low.

  The present invention further includes a seal member that is attached to the base member, the intermediate IC tag body is interposed between the base member and the seal member, and the intermediate antenna is superimposed on the main antenna. It is preferable that the seal member is attached to the base member in a wirelessly connected state.

  With this configuration, the intermediate antenna and the main antenna are wirelessly connected by attaching the seal member to the base member so that the intermediate antenna overlaps the main antenna. Therefore, the intermediate antenna and the main antenna can be easily connected and fixed, the productivity of the wireless IC tag can be improved, and the manufacturing cost can be kept low.

  In the present invention, it is preferable that the intermediate IC tag body is attached to a surface of the base member opposite to the printed surface of the antenna pattern.

  Even if the intermediate IC tag body is attached to the surface of the base member opposite to the printed surface of the antenna pattern and the intermediate antenna is superimposed on the main antenna, the intermediate antenna and the main antenna are connected wirelessly. Therefore, the intermediate antenna and the main antenna can be easily connected, and the convenience of the wireless IC tag is improved. For example, an antenna pattern can be printed on the back surface of the base member, and an intermediate IC tag body can be attached to the front surface of the base member.

  In the present invention, the plurality of intermediate IC tag bodies are attached to one base member, and the intermediate antennas of the plurality of intermediate IC tag bodies are overlapped with the main antenna of the one base member. It is desirable to wirelessly connect and share the antenna of the one base member.

  With this configuration, information stored in each IC chip of a plurality of intermediate IC tag bodies can be wirelessly communicated by sharing one main antenna. In addition, by attaching a plurality of intermediate IC tag bodies to one base member in a timely manner, it is possible to use a wireless IC tag according to the time and situation. By using a plurality of intermediate IC tag bodies in this way, the application of the wireless IC tag is expanded and convenience is improved.

  In the present invention, it is desirable that the intermediate antenna is composed of a plurality of conductive wires extending from both sides of the IC chip.

  With this configuration, the Q factor of the intermediate antenna can be adjusted by increasing / decreasing the number of conductive wires constituting the intermediate antenna. For example, the Q factor of the intermediate antenna can be increased by increasing the number of conductive wires constituting the intermediate antenna. Here, the Q coefficient is a coefficient obtained by the half-value width 2Δω of power at the resonance frequency ωo (Q = ωo / 2Δω), and is an index indicating the frequency selectivity of the antenna (for example, the sharpness of the sensitivity of the antenna). . Therefore, the design freedom of the intermediate antenna is increased. For example, the frequency selectivity of the intermediate antenna can be increased (for example, the sensitivity of the intermediate antenna is sharpened) by increasing the number of conductive wires constituting the intermediate antenna and increasing the Q factor of the intermediate antenna.

  Further, in the present invention, the antenna is configured by an antenna pattern including a pair of spiral patterns, and the pair of conductive wires configuring the intermediate antenna is overlapped with the antenna pattern including the pair of spiral patterns, respectively. And wirelessly connected.

  With this configuration, since the antenna pattern of the antenna is an antenna pattern including a spiral pattern, even when the length of the antenna is set to be long according to the wavelength of the radio wave, the antenna pattern is within a predetermined area. A long antenna can be rolled in and stored. Therefore, the space utilization efficiency is improved and the wireless IC tag can be downsized.

  The intermediate IC tag body of the present invention includes an IC chip and a pair of conductive antennas extending from both sides of the IC chip.

With this configuration, since the intermediate antenna is formed of a conductive wire, the intermediate antenna can be easily connected to the IC chip by, for example, resistance welding. Therefore, the manufacturing process of the intermediate IC tag body is simplified, and the manufacturing cost can be kept low.
Further, since the intermediate antenna is provided on both sides of the IC chip of the intermediate IC tag body, wireless communication can be performed in a non-contact state only with the intermediate IC tag body. Therefore, the IC chip read / write test can be easily performed in a state where the intermediate IC tag body is just brought close to the reader or writer. Thus, before connecting the intermediate antenna to the main antenna, wireless communication can be performed in a non-contact state to perform a read / write test of the IC chip. Therefore, by manufacturing a wireless IC tag using such an intermediate IC tag body, it is possible to find a defect of the IC chip before the wireless IC tag is completed, and to suppress a decrease in the yield of the wireless IC tag. Cost reduction can be achieved.

  The intermediate IC tag body set of the present invention includes a plurality of seal members that are detachably attached to a base sheet member, and the plurality of intermediate IC tag bodies, and the intermediate IC tag body includes the seal member and the seal member. It is interposed between the base sheet member, and when the seal member is peeled off from the base sheet, the seal member is peeled off from the base sheet member with the seal member. It is glued.

  With this configuration, the seal member is peeled from the base sheet member together with the intermediate IC tag body, and the seal member is attached to the base member so that the intermediate antenna overlaps the main antenna. By manufacturing a wireless IC tag using such an intermediate IC tag body set, the intermediate antenna and the antenna can be easily connected and fixed wirelessly, and the productivity of the wireless IC tag is improved. Thus, the manufacturing cost can be kept low.

  In the method of manufacturing a wireless IC tag according to the present invention, an intermediate antenna of a pair of conductive wires is connected to both sides of an IC chip to form an intermediate IC tag body, and a pair of antenna patterns is printed on the surface of the base member with conductive ink. Then, the antenna is formed, and a seal member is attached to the base member so that the intermediate antenna is overlaid on the main antenna and wirelessly connected, and the intermediate IC tag body is attached to the base member. Attach to base member.

  An intermediate antenna can be easily formed by connecting a lead wire to the IC chip by, for example, resistance welding. Moreover, this antenna can be easily formed by printing the antenna pattern of this antenna on a base member with conductive ink. Furthermore, by superimposing the intermediate antenna on the main antenna, the intermediate antenna and the main antenna are connected wirelessly, and the intermediate antenna and the main antenna can be easily connected. Therefore, the manufacturing process of the wireless IC tag is simplified, and the manufacturing cost can be kept low.

  According to the present invention, by providing an intermediate IC tag body having an intermediate antenna and this antenna to which the intermediate antenna is wirelessly connected, the read / write test of the IC chip is easy, and the manufacturing process of the wireless IC tag is reduced. It is possible to provide a wireless IC tag which can be simplified and has an effect that manufacturing cost can be kept low.

  Hereinafter, wireless IC tags according to embodiments of the present invention will be described with reference to the drawings. In the present embodiment, for example, in the case of a wireless IC tag that performs wireless communication using radio waves in the UHF band (300 MHz to 3 GHz) and manages information such as collection and delivery information for home delivery services, product inventory information, and antitheft information Is illustrated.

(First embodiment)
The first embodiment of the present invention exemplifies the case of a wireless IC tag that manages collection / delivery information of home delivery service. In this case, for example, the IC chip stores collection / delivery information such as customer information of the delivery service and collection / delivery progress.

  Such a wireless IC tag according to the first embodiment is shown in FIGS. FIG. 1 is a plan view of an intermediate IC tag body and this antenna constituting the wireless IC tag of the present embodiment. FIG. 2 is a plan view of the wireless IC tag in which the intermediate IC tag body is attached to the antenna, and FIG. 3 is a side sectional view of the wireless IC tag. FIG. 4 is an enlarged plan view of the intermediate IC tag body.

  As shown in FIGS. 1 to 3, the wireless IC tag 101 includes an intermediate IC tag body 104 having an IC chip 102 and an intermediate antenna 103, and a main antenna 106 printed on the surface (front side surface) of the home delivery service sheet 105. It is comprised by. As shown in FIG. 4, a pair of antenna connection electrodes 107 are provided at corners on both sides of the IC chip 102. A pair of thin copper wires 108 are connected to the pair of electrodes 107 of the IC chip 102. As described above, the intermediate antenna 103 is constituted by the pair of copper thin wires 108. In the present embodiment, the copper thin wire 108 is electrically connected to the electrode 107 by, for example, resistance welding. The total length of the intermediate antenna 103, that is, the length from the tip of one copper thin wire 108 to the tip of the other copper thin wire 108 is 1/5 of the wavelength of a radio wave used for wireless communication (for example, λ = 30 cm). Is set. As described above, by setting the total length of the intermediate antenna 103 to a length of 1 / integer of the radio wave wavelength, the frequency selectivity of the intermediate antenna 103 is increased (for example, the sensitivity of the intermediate antenna 103 is sharp).

  As shown in FIG. 1, the intermediate IC tag body 104 in a state before being attached is interposed between a seal 110 having an adhesive layer 109 on the back surface and a mount 111 having a peeling process applied to the front surface. . The intermediate IC tag body 104 is adhered to the adhesive layer 109 on the back surface of the seal 110 so that when the seal 110 is peeled from the mount 111, the intermediate IC tag body 104 is peeled from the mount 111. In the present embodiment, as a material of the seal 110, for example, a transparent plastic sheet or paper is used.

  As shown in FIGS. 1 to 3, the antenna 106 is a pair of antenna patterns 112 printed on the surface of the home delivery service sheet 105 with conductive ink. In the present embodiment, the antenna pattern 112 of the antenna 106 has a bipolar linear shape constituted by a pair of left and right straight lines. The total length of the antenna 106, that is, the length from the tip of one of the bipolar straight lines to the tip of the other straight line is ½ of the wavelength of the radio wave used for wireless communication (for example, λ = 30 cm). Is set. In this way, by setting the total length of the main antenna 106 to a length that is 1 / integer of the wavelength of the radio wave, the frequency selectivity of the main antenna 106 is increased (for example, the sensitivity of the main antenna 106 is sharp). Further, as the conductive ink, for example, a silver particle ink in which a silver particle paste or the like is added to the printing ink is used. Silver particle ink is suitable as a conductive ink because it hardly corrodes and has a small electric resistance.

  In the case of manufacturing the intermediate IC tag body 104 in a state before pasting, the copper thin wires 108 are electrically connected to the antenna connecting electrodes 107 of the IC chip 102 by, for example, resistance welding. Then, the intermediate IC tag body 104 is placed on the mount 111, and a seal 110 is attached thereon, and the intermediate IC tag body 104 is interposed between the front surface of the mount 111 and the back surface of the seal 110.

  When using the intermediate IC tag body 104 as described above, the seal 110 having the intermediate IC tag body 104 bonded to the back surface is peeled off from the mount 111. At this time, the intermediate IC tag body 104 is peeled from the mount 111 along with the seal 110. Then, the seal 110 is affixed to the surface of the home delivery service sheet 105 so that the pair of copper thin wires 108 of the intermediate IC tag body 104 overlap the pair of antenna patterns 112, respectively. In this manner, when the intermediate antenna 103 is overlapped with the main antenna 106, the intermediate antenna 103 and the main antenna 106 are wirelessly connected by electromagnetic interaction. In this embodiment, since the transparent plastic sheet seal 110 is used, the operator can perform the pasting operation while visually confirming that the copper thin wire 108 overlaps the antenna pattern 112. In the present embodiment, the thin copper wire 108 is provided with a coating, and the thin copper wire 108 is not in direct contact with the antenna pattern 112. However, as shown in FIG. 3, if the copper thin wire 108 overlaps the antenna pattern 112, the copper thin wire 108 and the antenna pattern 112 are wirelessly connected. Accordingly, the intermediate antenna 103 and the main antenna 106 form one antenna, and the intermediate antenna 103 and the main antenna 106 function as the antenna of the wireless IC tag 101.

  When managing the collection and delivery information of the home delivery service using the wireless IC tag 101 as described above, the wireless IC tag 101 is used as follows, for example. First, collection / delivery information such as customer information of delivery service and collection / delivery progress is stored in the IC chip 102. Then, the intermediate IC tag body 104 having the IC chip 102 is affixed to the home delivery service sheet 105 affixed to the package, thereby forming the wireless IC tag 101. When the delivery service collection / delivery worker delivers the package to the customer, the customer information is read from the wireless IC tag 101 attached to the package delivery service sheet 105, and when the delivery is completed, the delivery service sheet 105 wirelessly is read. The collection / delivery information is written in the IC tag 101.

  In the wireless IC tag 101 of the first embodiment as described above, the intermediate antenna 103 is composed of the copper thin wire 108, so that the intermediate antenna 103 can be easily connected to the IC chip 102 by, for example, resistance welding. Can do. In addition, the main antenna 106 includes an antenna pattern 112, and the intermediate antenna 103 and the main antenna 106 are wirelessly connected by overlapping the intermediate antenna 103 on the main antenna 106. Therefore, the intermediate antenna 103 and the main antenna 106 can be easily connected, the manufacturing process of the wireless IC tag 101 is simplified, and the manufacturing cost can be kept low.

  Further, since the intermediate antenna 103 is provided on both sides of the IC chip 102 of the intermediate IC tag body 104, wireless communication can be performed in a non-contact state only with the intermediate IC tag body 104. In the present embodiment, the total length of the intermediate antenna 103 is set to 1/5 of the wavelength of a radio wave used for wireless communication (for example, λ = 30 cm). Radio waves can be blown for a communication distance of several centimeters. Therefore, the read / write test of the IC chip 102 can be easily performed in a state where the intermediate IC tag body 104 is only brought to a distance of several centimeters from the reader or writer. Thereby, before connecting the intermediate IC tag body 104 to the main antenna 106, wireless communication can be performed in a non-contact state to perform a read / write test of the IC chip 102. Therefore, a defect of the IC chip 102 can be found before the completion of the wireless IC tag 101, a decrease in the yield of the wireless IC tag 101 can be suppressed, and the manufacturing cost can be reduced.

  Further, in the wireless IC tag 101 of this embodiment, by removing the intermediate IC tag body 104 from the main antenna 106, only the main antenna 106 (the home delivery service sheet 105 on which the main antenna 106 is printed) is discarded. The intermediate IC tag body 104 can be used repeatedly.

  Further, in the wireless IC tag 101 of the present embodiment, the intermediate IC tag body 104 and the antenna 106 are separated from each other. Therefore, when the information stored in the IC chip 102 is to be used, the intermediate IC tag body is used. By attaching 104 to the antenna 106, the user can select the time for using the information on the IC chip 102.

  In the wireless IC tag 101 of this embodiment, the antenna 106 can be easily formed by printing the antenna pattern 112 of the antenna 106 on the delivery service paper 105 with silver grain ink. Therefore, the manufacturing process of the wireless IC tag 101 is simplified, and the manufacturing cost can be kept low.

  Further, in the wireless IC tag 101 of this embodiment, the intermediate antenna 103 and the main antenna 106 are wirelessly attached by attaching the sticker 110 to the home delivery service sheet 105 so that the intermediate antenna 103 overlaps the main antenna 106. Connected to. Therefore, the intermediate antenna 103 and the main antenna 106 can be easily connected and fixed, the productivity of the wireless IC tag 101 can be improved, and the manufacturing cost can be kept low.

  In the intermediate IC tag body 104 of the present embodiment, since the intermediate antenna 103 is composed of the copper thin wire 108, the intermediate antenna 103 can be easily connected to the IC chip 102 by, for example, resistance welding. Therefore, the manufacturing process of the intermediate IC tag body 104 is simplified, and the manufacturing cost can be kept low.

  Further, since the intermediate antenna 103 is provided on both sides of the IC chip 102 of the intermediate IC tag body 104, wireless communication can be performed in a non-contact state only with the intermediate IC tag body 104. Therefore, it is possible to easily perform the read / write test of the IC chip 102 with the intermediate IC tag body 104 just in proximity to the reader or writer. Thus, before connecting the intermediate antenna 103 to the main antenna 106, wireless communication can be performed in a non-contact state to perform a read / write test of the IC chip 102. Therefore, by manufacturing the wireless IC tag 101 using such an intermediate IC tag body 104, a defect of the IC chip 102 can be found before the wireless IC tag 101 is completed, and the yield of the wireless IC tag 101 can be increased. The reduction can be suppressed and the manufacturing cost can be reduced. For example, since a conventional wireless IC tag cannot perform a non-contact inspection only with an IC chip, the capacitance of the IC chip is measured by a contact inspection, and whether or not the wireless communication function of the IC chip is defective ( Whether the radio wave flew or not) was predicted from the result of the measured capacitance value. For this reason, some of the completed products of conventional wireless IC tags include products that have a poor wireless communication function (the radio waves do not fly) even though the measured value of the capacitance of the IC chip is normal. . On the other hand, in the wireless IC tag 101 of the present embodiment, even with the intermediate IC tag body 104 alone, the wireless communication can be performed in a non-contact state and the read / write test of the IC chip 102 can be actually performed. Prior to the completion of the wireless IC tag 101, quality inspection (checking whether radio waves fly) can be performed at the same level as the finished product.

  In the manufacturing method of wireless IC tag 101 of the present embodiment, intermediate antenna 103 can be easily formed by connecting copper thin wire 108 to IC chip 102 by, for example, resistance welding. Also, the antenna 106 can be easily formed by printing the antenna pattern 112 of the antenna 106 on the delivery service paper 105 with silver grain ink. Furthermore, the intermediate antenna 103 and the main antenna 106 are wirelessly connected by superimposing the intermediate antenna 103 on the main antenna 106, and the intermediate antenna 103 and the main antenna 106 can be easily connected. Therefore, the manufacturing process of the wireless IC tag 101 is simplified, and the manufacturing cost can be kept low.

(Second Embodiment)
Next, FIG. 5 shows a side sectional view of the wireless IC tag according to the second embodiment of the present invention. Here, the difference between the wireless IC tag of this embodiment and the first embodiment will be mainly described. Unless otherwise specified, the wireless IC tag of this embodiment has the same configuration as that of the first embodiment.

  In the present embodiment illustrated in FIG. 5, the antenna pattern 212 of the antenna 206 is printed on the back surface (back surface) of the home delivery service sheet 205. The intermediate IC tag body 204 is attached to the front surface (front surface) of the home delivery service sheet 205, that is, the surface opposite to the surface on which the antenna pattern 212 is printed, with a seal 210. In the present embodiment, the thickness of the delivery service sheet 205 does not hinder the electromagnetic interaction between the antenna 206 and the intermediate antenna 203, and the antenna 206 and the intermediate antenna 203 function as one antenna. The thickness is thin enough to ensure the thickness.

  As described above, since the thickness of the delivery service sheet 205 is sufficiently thin to prevent the electromagnetic interaction between the main antenna 206 and the intermediate antenna 203 and to ensure the function as an antenna, the intermediate IC tag Even when the body 204 is attached to the surface of the base member 205 opposite to the printed surface of the antenna pattern 212 and the intermediate antenna 203 is overlapped with the main antenna 206, the intermediate antenna 203 and the main antenna 206 are connected wirelessly. Therefore, the intermediate antenna 203 and the main antenna 206 can be easily connected, and the convenience of the wireless IC tag 101 is improved. For example, the antenna pattern 212 is printed on the back side of the home delivery service sheet 205, and the intermediate IC tag body 204 is pasted on the front side of the home delivery service sheet 205.

(Third embodiment)
The third embodiment of the present invention exemplifies a case of a wireless IC tag that manages two types of information, that is, product inventory information and anti-theft information. In this case, for example, two intermediate IC tag bodies are used. One intermediate IC tag is affixed to the product in advance, and price information and inventory information of the product are stored in the IC chip. The other intermediate IC tag body is affixed to the product by a cashier counter, and information for canceling the antitheft alarm is stored in the IC chip.

  A plan view of the wireless IC tag of the third embodiment is shown in FIG. Here, the difference between the wireless IC tag of this embodiment and the first embodiment will be mainly described. Unless otherwise specified, the wireless IC tag of this embodiment has the same configuration as that of the first embodiment.

  In the present embodiment shown in FIG. 6, two intermediate IC tag bodies 304 </ b> A and 304 </ b> B are attached to one base member 305 of the wireless IC tag 301. The pair of thin copper wires 308A and 308B of the intermediate IC tag bodies 304A and 304B are overlapped with the pair of antenna patterns 312 of the base member 305, and the two intermediate antennas 303A and 303B are respectively connected to one main antenna 306. Connected wirelessly. In this way, the intermediate antennas 303A and 303B of the two intermediate IC tag bodies 304A and 304B share the main antenna 306 of one base member 305.

  When managing two types of information, such as commodity inventory information and theft prevention information, using the wireless IC tag 301 as described above, the wireless IC tag 301 is used as follows, for example. First, product price information and inventory information are stored in one IC chip 302A, and information for canceling an anti-theft alarm is stored in the other IC chip 302B. Then, one intermediate IC tag body 304A is attached to the product.

  Thereafter, when the purchaser of the product pays at the cashier counter, the cashier reads the price information and inventory information of the product from one IC chip 302A and attaches the other intermediate IC tag body 304B to the product. And the goods with the other intermediate IC tag body 304B attached thereto are allowed to pass through an alarm device installed at the outlet of the store.

  According to the wireless IC tag 301 of the third embodiment as described above, a plurality of pieces of information stored in the IC chips 302A and 302B of the plurality of intermediate IC tag bodies 304A and 304B are shared by one main antenna 306. Wireless communication. In addition, by attaching a plurality of intermediate IC tag bodies 304A and 304B to one base member 305 in a timely manner, the wireless IC tag 301 can be used according to time and circumstances. By using the plurality of intermediate IC tag bodies 304A and 304B in this way, the application of the wireless IC tag 301 is expanded and convenience is improved.

(Fourth embodiment)
Next, a wireless IC tag according to a fourth embodiment of the present invention is shown in FIGS. FIG. 7 is a plan view of the intermediate IC tag body and the antenna constituting the wireless IC tag of the present embodiment. FIG. 8 is a plan view of the wireless IC tag in which the intermediate IC tag body is attached to the antenna, and FIG. 9 is an enlarged plan view of the intermediate IC tag body. Here, the difference between the wireless IC tag of this embodiment and the first embodiment will be mainly described. Unless otherwise specified, the wireless IC tag of this embodiment has the same configuration as that of the first embodiment.

  In the present embodiment shown in FIGS. 7 to 9, two copper thin wires 408 are connected to the electrodes 407 at the corners on both sides of the IC chip 402 of the wireless IC tag 401 (see FIG. 9). In this way, the intermediate antenna 403 is constituted by a pair of thin copper wires 408 each having two wires. Each of the two copper thin wires 408 is superimposed on a pair of antenna patterns 412 constituting the main antenna 406, and the intermediate antenna 403 and the main antenna 406 are wirelessly connected (see FIG. 8).

  In this embodiment, an example in which two conductors are connected to the electrodes 407 on both sides of the IC chip 402 has been described. However, three or more conductors are respectively connected to the electrodes 407 on both sides of the IC chip 402. It may be connected.

  Thus, the Q factor of the intermediate antenna 403 can be adjusted by increasing or decreasing the number of the thin copper wires 408 constituting the intermediate antenna 403. For example, the Q factor of the intermediate antenna 403 can be increased by increasing the number of copper thin wires 408 constituting the intermediate antenna 403. Therefore, the design freedom of the intermediate antenna 403 is increased. For example, the frequency selectivity of the intermediate antenna 403 is increased (for example, the sensitivity of the intermediate antenna 103 is sharpened) by increasing the number of conductive wires 408 constituting the intermediate antenna 403 and increasing the Q coefficient of the intermediate antenna 403. be able to.

(Fifth embodiment)
Next, a wireless IC tag according to a fifth embodiment of the present invention is shown in FIGS. FIG. 10 is a plan view of the intermediate IC tag body and the present antenna constituting the wireless IC tag of this embodiment, and FIG. 11 is a plan view of the wireless IC tag in which the intermediate IC tag body is attached to the present antenna. is there. Here, the difference between the wireless IC tag of this embodiment and the first embodiment will be mainly described. Unless otherwise specified, the wireless IC tag of this embodiment has the same configuration as that of the first embodiment.

  In this embodiment mode shown in FIGS. 10 and 11, the main antenna 506 of the wireless IC tag 501 is constituted by a pair of spiral antenna patterns 512 printed on the surface of the base member 505. The base member 505 has a substantially square shape, and a pair of spiral antenna patterns 512 are respectively disposed at opposite corners of the base member 505. Then, the pair of copper thin wires 508 constituting the intermediate antenna 503 are overlapped with the pair of spiral antenna patterns 512, respectively, and the intermediate antenna 503 and the main antenna 506 are wirelessly connected (see FIG. 11).

  In the present embodiment, when the antenna 506 is formed on the base member 505, for example, a plurality of spiral antenna patterns 512 are printed in advance on the surface of a large base member sheet, and a large base member sheet is formed. Carve into squares. Accordingly, the base member 505 on which the antenna 506 is formed can be easily mass-produced, so that the manufacturing cost of the wireless IC tag 501 can be kept low.

  According to the wireless IC tag 501 of the fifth embodiment as described above, since the antenna pattern 512 of the antenna 506 is formed in a spiral pattern, the length of the antenna 506 is set according to the wavelength of the radio wave. Even when the length is set long, the long antenna 506 can be wound and housed in a predetermined area. Therefore, space utilization efficiency is improved, and the wireless IC tag 501 can be downsized.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  In the above description, the intermediate IC tag body is previously interposed between the seal member and the base sheet member, the seal member is peeled off from the base sheet member together with the intermediate IC tag body, and is attached to the base member. Although described, the scope of the present invention is not limited to these. For example, the intermediate IC tag body may be placed on the base member so that the intermediate antenna and the main antenna overlap with each other, and a seal member may be attached and fixed thereon.

In the above description, an example is described in which one base sheet member is attached with one seal member with one intermediate IC tag body interposed therebetween, but the scope of the present invention is limited to these. It is not a thing. For example, as shown in FIG. 12, an intermediate IC tag body set 613 in which a plurality of seal members 610 with a plurality of intermediate IC tag bodies 604 interposed are detachably attached to a single sheet member 611. Also good. Each intermediate IC tag body 604 is attached to the adhesive surface of each seal member 610 so that when each seal member 610 is peeled off from the base sheet member 611, the intermediate IC tag body 604 is peeled off from the base sheet member 611 along with each seal member 610. It is glued.
Also in this case, the seal member 610 is peeled from the base sheet member 611 together with the intermediate IC tag body 604, and the seal member 610 is attached to the base member 605 so that the intermediate antenna 603 overlaps the main antenna 606. By manufacturing the wireless IC tag 601 using such an intermediate IC tag body set 613, the intermediate antenna 603 and the main antenna 606 can be easily connected and fixed wirelessly. Productivity is improved and manufacturing costs can be kept low.

  In the above description, the example in which the conductive wire is directly connected to the electrode of the IC chip when the intermediate antenna is formed has been described. However, the scope of the present invention is not limited thereto. For example, an intermediate antenna may be formed by electrically connecting a connection terminal to an electrode of an IC chip and electrically connecting a conductive wire to the connection terminal.

  In the above description, examples of performing wireless communication using radio waves in the UHF band have been described. However, the scope of the present invention is not limited to these, and for example, wireless communication using radio waves in other frequency bands. Communication may be performed.

  In the above description, the conductive wire is provided with a coating and the copper wire is not in direct contact with the antenna pattern. However, the scope of the present invention is not limited to these examples. May be in direct contact with the antenna pattern.

  In the above description, the antenna pattern of the present antenna has been described as an example of a pair of spiral patterns. However, the scope of the present invention is not limited to these, for example, the antenna pattern of the present antenna. However, a pair of spiral patterns and a linear pattern or a curved pattern may be combined.

  As described above, the wireless IC tag according to the present invention is easy to read / write an IC chip, can simplify the manufacturing process of the wireless IC tag, and can reduce the manufacturing cost. Useful.

The top view of the intermediate | middle IC tag body and this antenna in the 1st Embodiment of this invention The top view of the radio | wireless IC tag in the 1st Embodiment of this invention Side sectional view of the wireless IC tag in the first embodiment of the present invention The enlarged plan view of the intermediate IC tag body in the first embodiment of the present invention Side sectional view of the wireless IC tag in the second embodiment of the present invention The top view of the radio | wireless IC tag in the 3rd Embodiment of this invention Plan view of intermediate IC tag body and main antenna in the fourth embodiment of the present invention The top view of the radio | wireless IC tag in the 4th Embodiment of this invention The enlarged plan view of the intermediate | middle IC tag body in the 4th Embodiment of this invention Plan view of intermediate IC tag body and main antenna according to fifth embodiment of the present invention The top view of the radio | wireless IC tag in the 5th Embodiment of this invention Plan view of an intermediate IC tag body set and the present antenna according to another embodiment of the present invention

Explanation of symbols

101 wireless IC tag 102 IC chip 103 intermediate antenna 104 intermediate IC tag body 105 home delivery service sheet (base member)
106 This antenna 108 Copper fine wire (conductor)
110 Seal (seal member)
111 Mount (base sheet member)
112 Antenna pattern 613 Intermediate IC tag body set

Claims (10)

An intermediate IC tag body having an IC chip and an intermediate antenna composed of a pair of conductive wires extending from both sides of the IC chip;
A wireless IC tag comprising: the present antenna configured by a pair of antenna patterns that are wirelessly connected by overlapping the intermediate antenna.   The wireless IC tag according to claim 1, wherein the antenna pattern of the main antenna is printed with a conductive ink on a surface of a base member. A seal member that is attached to the base member;
The intermediate IC tag body is interposed between the base member and the seal member, and the seal member is attached to the base member in a state where the intermediate antenna is superimposed on the main antenna and wirelessly connected. The wireless IC tag according to claim 2, wherein the wireless IC tag is provided.   The wireless IC tag according to claim 2 or 3, wherein the intermediate IC tag body is attached to a surface of the base member opposite to a printed surface of the antenna pattern. A plurality of the intermediate IC tag bodies are attached to one base member,
The intermediate antennas of the plurality of intermediate IC tag bodies are wirelessly connected by being overlapped with the main antenna of the one base member, and share the main antenna of the one base member. The wireless IC tag according to claim 4.   The wireless IC tag according to any one of claims 1 to 5, wherein the intermediate antenna includes a plurality of conductive wires respectively extending from both sides of the IC chip. The antenna is composed of an antenna pattern including a pair of spiral patterns,
The pair of conductors constituting the intermediate antenna are wirelessly connected to each other by being superimposed on an antenna pattern including the pair of spiral patterns. Wireless IC tag.   An intermediate IC tag body comprising an IC chip and an intermediate antenna of a pair of conductive wires extending from both sides of the IC chip. A plurality of seal members that are detachably attached to the base sheet member, and a plurality of intermediate IC tag bodies according to claim 8,
The intermediate IC tag body is interposed between the seal member and the base sheet member, and peels off from the base sheet member along with the seal member when the seal member is peeled off from the base sheet. As described above, the intermediate IC tag body set is bonded to the bonding surface of the seal member. An intermediate IC tag body is formed by connecting an intermediate antenna of a pair of conductors to both sides of the IC chip,
A pair of antenna patterns are printed with conductive ink on the surface of the base member to form this antenna.
A seal member is attached to the base member and the intermediate IC tag body is attached to the base member so that the intermediate antenna is overlaid on the main antenna and connected wirelessly. A method of manufacturing a wireless IC tag.

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