JPWO2019202817A1 - RFID tag - Google Patents

Abstract

Provided is an RFID tag that can be attached to a cloth product and can have a longer communication distance. An RFID tag according to the present invention includes an RFIC element, a base material that incorporates the RFIC element, a first terminal electrode and a second terminal electrode that are provided so as to be exposed from the surface of the base material, and that are connected to the RFIC element. An RFIC module having a coil, a winding part helically wound on the surface of the base material, and a first part extending directly from one end of the winding part and partially connected to the first terminal electrode. The antenna member is a thread-shaped conductor having a one-terminal connection conductor and a second terminal connection conductor extending from the other end of the winding portion and partially connected directly to the second terminal electrode.

Description

  The present invention relates to an RFID tag that can be attached to cloth products such as linen.

  BACKGROUND ART RFID (Radio-Frequency IDentification) tags used by being attached to cloth products such as linen have been conventionally known. For example, the RFID tag described in Patent Document 1 has a main antenna sewn on a cloth product and a loop antenna connected to a semiconductor device and arranged in the vicinity of the main antenna. The RFID tag performs wireless communication by magnetically coupling the main antenna and the loop antenna.

Japanese Patent No. 5912398

  However, the RFID tag described in Patent Document 1 has a problem that the degree of coupling between the main antenna and the loop antenna is small, and it is difficult to secure a long communication distance.

  An object of the present invention is to solve the above-mentioned problems, and to provide an RFID tag that can be attached to a cloth product and can have a longer communication distance.

In order to achieve the above object, an RFID tag according to one embodiment of the present invention,
An RFIC module having an RFIC element, a base material incorporating the RFIC element, and a first terminal electrode and a second terminal electrode provided so as to be exposed from a surface of the base material and connected to the RFIC element, ,
A winding portion helically wound on the surface of the base material, and a first terminal connection extending from one end of the winding portion and partially connected directly to the first terminal electrode. An antenna member that is a thread-shaped conductor having a conductor and a second terminal connecting conductor that extends from the other end of the winding portion and is partially connected directly to the second terminal electrode;
Equipped with.

  According to the RFID tag of the present invention, the communication distance can be increased in the RFID tag that can be attached to the cloth product.

It is a perspective view showing a schematic structure of an RFID tag concerning an embodiment of the present invention. FIG. 2 is a side view showing the RFID tag of FIG. 1 through the inside. It is a top view of the RFID tag of FIG. It is a partially expanded sectional view of the RFID tag of FIG. It is an equivalent circuit schematic of the RFID tag of FIG. It is sectional drawing which shows an example of the manufacturing method of an RFID module. It is sectional drawing which shows the process of following FIG. It is sectional drawing which shows the process of following FIG. It is a side view which penetrates and shows the modification of the RFID tag of FIG. It is a top view which shows the modification of the RFID tag of FIG. It is sectional drawing which shows the 1st modification of the 1st or 2nd terminal electrode. It is sectional drawing which shows the 2nd modification of the 1st or 2nd terminal electrode. It is sectional drawing which shows the state which the antenna member was connected to the 1st modification of the 1st or 2nd terminal electrode shown in FIG. It is sectional drawing which shows the 3rd modification of a 1st or 2nd terminal electrode. It is a perspective view which shows the 3rd modification of a 1st or 2nd terminal electrode in a partial cross section. It is sectional drawing which shows the state which the antenna member was connected to the 3rd modification of the 1st or 2nd terminal electrode shown in FIG.

An RFID tag according to one embodiment of the present invention,
An RFIC module having an RFIC element, a base material incorporating the RFIC element, and a first terminal electrode and a second terminal electrode provided so as to be exposed from a surface of the base material and connected to the RFIC element, ,
A winding part helically wound on the surface of the base material, and a first terminal connection extending from one end of the winding part and partially connected directly to the first terminal electrode. An antenna member that is a thread-shaped conductor having a conductor and a second terminal connecting conductor that extends from the other end of the winding portion and is partially connected directly to the second terminal electrode;
Equipped with.

  According to this structure, since the antenna member which is the filamentous conductor is provided, the RFID tag can be attached to the cloth product. Further, since the first terminal connecting conductor and the first terminal electrode are directly connected to each other and the second terminal connecting conductor and the second terminal electrode are directly connected to each other, the degree of coupling between the antenna member and the RFIC module is increased, The communication distance can be made longer.

  At least one of the first terminal electrode and the second terminal electrode may be provided so as to have a height larger than the diameter of the antenna member so as to project from the surface of the base material. According to this configuration, for example, when connecting the terminal electrode and the terminal connecting conductor using the heater chip, it is possible to prevent the heater chip from coming into contact with the winding portion and easily connect the terminal electrode and the terminal connecting conductor. can do. Moreover, since the heater chip can be prevented from coming into contact with the winding portion, the RFIC module can be downsized.

  One end of the winding portion is closer to the second terminal electrode than the first terminal electrode, is connected to the first terminal electrode by the first terminal connecting conductor, and is the other end of the winding portion. The part may be closer to the first terminal electrode than the second terminal electrode, and may be connected to the second terminal electrode by the second terminal connecting conductor. According to this configuration, the length of the portion of the first terminal connecting conductor extending from the one end of the winding portion to the first terminal electrode can be lengthened to increase the resistance of the portion to the tensile force, It is possible to suppress disconnection of the first terminal connecting conductor. Further, the length of the portion of the second terminal connecting conductor extending from the other end of the winding portion to the second terminal electrode can be increased to enhance the resistance of the portion to the tensile force. It is possible to suppress disconnection of the connection conductor.

  Further, the RFIC module may be configured to have a shape having a longitudinal direction, and the winding portion may be provided such that a winding axis extends parallel to the longitudinal direction. With this configuration, the antenna member can be wound around the RFIC module with a larger number of turns. Moreover, the diameter of the winding portion can be reduced, and the width in the direction orthogonal to the extending direction of the antenna member can be reduced.

  Further, the winding portion may be arranged between the first terminal electrode and the second terminal electrode in the longitudinal direction. According to this configuration, it is not necessary to dispose the winding portion across the connecting portion between the first terminal connecting conductor and the first terminal electrode and the connecting portion between the second terminal connecting conductor and the second terminal electrode. The winding part can be made difficult to unwind.

  Further, at least one of the first terminal electrode and the second terminal electrode has a base material surface in contact with the base material and a connection surface facing the base material surface, and the length of the connection surface in the longitudinal direction. The length may be greater than the length of the substrate surface. According to this configuration, for example, when connecting the terminal electrode and the terminal connection conductor using the heater chip, the terminal electrode can be pressed by the heater chip and deformed from the connection surface side to the base material surface side. As a result, it is possible to prevent the thickness of the terminal connecting conductor located near the terminal electrode from becoming excessively thin, and to prevent the terminal connecting conductor from breaking.

  At least one of the first terminal electrode and the second terminal electrode may have a recess having a depth smaller than the diameter of the antenna member. According to this configuration, for example, when connecting the terminal electrode and the terminal connecting conductor by using the heater chip, by disposing the terminal connecting conductor in the recess, the terminal connecting conductor is pressed by the heater chip and excessively thickened. Can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment. Further, in the drawings, substantially the same members are designated by the same reference numerals.

(Embodiment)
Hereinafter, the RFID tag according to the embodiment of the present invention will be described. FIG. 1 is a perspective view showing a schematic configuration of an RFID tag according to an embodiment of the present invention. FIG. 2 is a perspective view showing the RFID tag of FIG. 1 through the inside. FIG. 3 is a plan view of the RFID tag of FIG.

  As shown in FIG. 1, an RFID (Radio-Frequency IDentification) tag 1 according to this embodiment includes an RFID module 2 and an antenna member 3.

  The RFID module 2 is, for example, an RFID tag capable of wireless communication at a communication frequency in the UHF band. In this embodiment, the RFID module 2 is configured to have a longitudinal direction. Specifically, the RFIID module 2 is a substantially rectangular parallelepiped block body having a longitudinal direction. The length of the RFID module 2 in the longitudinal direction (X direction) is, for example, 2.0 mm. The length of the RFID module 2 in the lateral direction (Y direction and Z direction) is, for example, 1.0 mm.

  As shown in FIG. 2, the RFID module 2 includes an RFIC (Radio-Frequency Integrated Circuit) element 21, a base material 22 containing the RFIC element 21, a first terminal electrode 23 and a second terminal electrode 23 connected to the RFIC element 21. And a terminal electrode 24.

  The RFIC element 21 is an IC chip and is configured to communicate with an external communication device (for example, a reader / writer device) via the antenna member 3.

  The base material 22 includes a substrate 22A and a resin block body 22B each made of an insulating material, and has a laminated structure in which they are laminated.

  The RFIC element 21 is provided on the first main surface 22Aa of the substrate 22A. The resin block body 22B is provided on the first main surface 22Aa of the substrate 22A so as to cover (embed) the RFIC element 21. The substrate 22A is made of, for example, ceramic. The resin block body 22B is made of, for example, a thermosetting resin such as an epoxy resin.

  One end of each of the first terminal electrode 23 and the second terminal electrode 24 is connected to the RFIC element 21, and the other end is exposed at the second main surface 22Ab facing the first main surface 22Aa of the substrate 22A. It is provided. That is, the first terminal electrode 23 and the second terminal electrode 24 are provided so as to be exposed from the surface of the base material 22. The first terminal electrode 23 and the second terminal electrode 24 are made of a conductive material such as copper, for example.

  In the present embodiment, the first terminal electrode 23 and the second terminal electrode 24 are provided so as to project from the second main surface 22Ab of the substrate 22A, which is the surface of the base material 22, as shown in FIG. In the present embodiment, the first terminal electrode 23 and the second terminal electrode 24 protruding from the second main surface 22Ab of the substrate 22A have a rectangular cross-sectional shape. The height W1 at which the first terminal electrode 23 and the second terminal electrode 24 project from the second main surface 22Ab of the substrate 22A is, for example, 200 μm.

  The antenna member 3 functions as an antenna of the RFID module 2 and is composed of a thread-like conductor (conductive thread) that can be sewn to a cloth product such as linen in an arbitrary sewing pattern. The antenna member 3 is made of a metal such as copper or stainless steel.

  In the present embodiment, the antenna member 3 is composed of a thread-shaped conductor covered with an insulating material. The antenna member 3 is composed of, for example, a thread-shaped conductor covered with a polyurethane resin layer. The diameter of the antenna member 3 is set smaller than the height W1 of the first terminal electrode 23 and the second terminal electrode 24. The diameter of the antenna member 3 is, for example, 100 μm. The diameter of the filamentous conductor is, for example, 50 μm. The thickness of the resin layer is, for example, 25 μm.

  The antenna member 3 may be a stranded wire formed by twisting a plurality of thread-shaped conductors instead of a single thread-shaped conductor. Further, the antenna member 3 may be slit tape thread, covering thread, coding thread, or the like.

  The antenna member 3 includes a winding portion 31, a first terminal connecting conductor 32, and a second terminal connecting conductor 33.

  The winding portion 31 is a portion that is helically wound on the surface of the base material 22. In the present embodiment, the winding portion 31 is arranged between the first terminal electrode 23 and the second terminal electrode 24 in plan view. As shown in FIG. 3, the winding part 31 is provided so that the winding axis A1 extends parallel to the longitudinal direction (X direction) of the RFID module 2. The winding portion 31 is not limited to be provided so that the winding axis A1 extends strictly parallel to the longitudinal direction (X direction) of the RFID module 2, and is substantially parallel. It may be provided so as to extend (including substantially parallel). The length of the winding portion 31 in the winding axis A1 direction is, for example, 1.5 mm.

  The first terminal connection conductor 32 is a portion that extends from the one end 31 </ b> A of the winding portion 31 and is partially connected directly to the first terminal electrode 23. The first terminal connection conductor 32 is connected to the first terminal electrode 23 by being heated while being pressed against the first terminal electrode 23 by a heater chip (not shown), for example. In this case, the heat of the heater chip melts a part of the resin layer 32B covering the thread-shaped conductor 32A of the first terminal connecting conductor 32 so that the thread-shaped conductor 32A and the first terminal electrode 23 are directly contacted with each other. Connected. Further, in this case, as shown in FIG. 3, the filamentous conductor 32A is crushed by the pressure of the heater chip, the outer shape (X direction and Y direction) of the filamentous conductor 32A in plan view is expanded, and the thickness of the filamentous conductor 32A is increased. (Z direction) becomes thinner. For example, the thickness of the thread-shaped conductor 32A is 20 μmm. Therefore, for example, when the heat of the heater chip applied to the connection portion between the thread-shaped conductor 32A and the first terminal electrode 23 is cooled by air and the thread-shaped conductor 32A contracts, a tensile force is applied to the thread-shaped conductor 32A. The filamentous conductor 32A is easily broken.

  Therefore, in the present embodiment, the one end portion 31A of the winding portion 31 is closer to the second terminal electrode 24 than the first terminal electrode 23 and is connected to the first terminal electrode 23 by the first terminal connecting conductor 32. . That is, the first terminal connecting conductor 32 extends from the one end 31A of the winding portion 31 as a starting point in a direction opposite to the direction from the other end 31B to the one end 31A in the extending direction of the winding axis A1. Is provided. As a result, the length of the portion of the first terminal connecting conductor 32 extending from the one end portion 31A of the winding portion 31 to the first terminal electrode 23 is increased, and the resistance of the portion to the tensile force is improved. In addition, by increasing the length of the portion of the first terminal connecting conductor 32 extending from the one end 31A of the winding portion 31 to the first terminal electrode 23, as shown in FIG. The angle at which the terminal connection conductor 32 and the inner upper edge 23A and the outer upper edge 23B of the first terminal electrode 23 intersect can be made closer to a right angle. As a result, the contact length between the first terminal connecting conductor 32 and the inner upper edge 23A and the outer upper edge 23B can be further shortened, and the first terminal connecting conductor 32 is disconnected at the intersection with the inner upper edge 23A. Can be suppressed.

  The second terminal connection conductor 33 is a portion that extends from the other end 31 </ b> B of the winding portion 31 and is partially connected directly to the second terminal electrode 24. The second terminal connection conductor 33 is connected to the second terminal electrode 24 by being heated while being pressed against the second terminal electrode 24 by a heater chip (not shown), for example. In this case, the heat of the heater chip melts a part of the resin layer 33B covering the thread-shaped conductor 33A of the second terminal connection conductor 33, as described with reference to FIG. 4, and the thread-shaped conductor 33A and the second terminal 33A. The electrode 24 is directly connected. Further, in this case, as shown in FIG. 3, the filament-shaped conductor 33A is crushed by the pressure of the heater chip, the outer shape (X direction and Y direction) of the filament-shaped conductor 33A in plan view expands, and the thickness of the filament-shaped conductor 33A increases. (Z direction) becomes thinner. For example, the thickness of the thread-shaped conductor 33A is 20 μmm. Therefore, for example, when the heat of the heater chip applied to the connection portion between the thread-shaped conductor 33A and the second terminal electrode 24 is cooled by the air and the thread-shaped conductor 33A contracts, a tensile force is applied to the thread-shaped conductor 33A. The filamentous conductor 33A is easily broken.

  Therefore, in the present embodiment, the other end 31B of the winding portion 31 is closer to the first terminal electrode 23 than the second terminal electrode 24 and is connected to the second terminal electrode 24 by the second terminal connecting conductor 33. There is. That is, the second terminal connecting conductor 33 extends from the other end 31B of the winding portion 31 as a starting point in a direction opposite to the direction from the one end 31A to the other end 31B in the extending direction of the winding axis A1. It is provided to do. Thereby, the length of the portion of the second terminal connecting conductor 33 extending from the other end 31B of the winding portion 31 to the second terminal electrode 24 is increased, and the resistance of the portion to the tensile force is improved. . Further, by increasing the length of the portion of the second terminal connection conductor 33 extending from the other end 31B of the winding portion 31 to the second terminal electrode 24, as shown in FIG. The angle at which the two-terminal connecting conductor 33 and the inner upper edge 24A of the second terminal electrode 24 intersect can be made closer to a right angle. Thereby, the contact length between the second terminal connecting conductor 33 and the inner upper edge 24A of the second terminal electrode 24 can be further shortened, and the second terminal connecting conductor 33 is disconnected at the intersection with the inner upper edge 24A. Can be suppressed.

  In the present embodiment, the length of the portion of the first terminal connecting conductor 32 that extends outward from the first terminal electrode 23 is set to be approximately 1/4 of the wavelength of the communication frequency used by the RFID module 2. ing. Similarly, the length of the portion of the second terminal connecting conductor 33 extending outward from the second terminal electrode 24 is set to be about ¼ of the wavelength of the communication frequency used by the RFID module 2. . That is, the length of the antenna member 3 excluding the section between the first terminal electrode 23 and the second terminal electrode 24 is set to approximately 1/2 (for example, 14 cm) of the wavelength. Thereby, the antenna member 3 functions as a half-wavelength dipole antenna.

  FIG. 5 is an equivalent circuit diagram of the RFID tag 1 according to this embodiment.

  In the present embodiment, the portion of the first terminal connecting conductor 32 extending from the first terminal electrode 23 to the outside functions as one radiation conductor of the half-wave dipole antenna. The portion of the second terminal connection conductor 33 extending outward from the second terminal electrode 24 functions as the other radiation conductor of the half-wave dipole antenna. The portion of the antenna member 3 (including the winding portion 31) located between the first terminal electrode 23 and the second terminal electrode 24 functions as an inductance element connected in series to the pair of radiation conductors. The RFIC element 21 is connected in parallel with the inductance element and functions as a power supply unit that supplies electric power.

  According to the present embodiment, since the antenna member 3 which is a filamentous conductor is provided, the RFID tag 1 can be attached to a cloth product. Further, since the first terminal connecting conductor 32 and the first terminal electrode 23 are directly connected to each other, and the second terminal connecting conductor 33 and the second terminal electrode 24 are directly connected to each other, the antenna member 3 and the RFIC module 2 are coupled to each other. The degree of communication can be increased to increase the communication distance.

  Further, according to the present embodiment, the first terminal electrode 23 is provided so as to protrude from the surface of the base material 22 at the height W1 larger than the diameter of the antenna member 3. Thereby, when connecting the 1st terminal electrode 23 and the 1st terminal connection conductor 32 using a heater chip, for example, it can control that a heater chip contacts with winding part 31. As a result, the first terminal electrode 23 and the first terminal connecting conductor 32 can be easily connected.

  Further, according to the present embodiment, the second terminal electrode 24 is provided so as to protrude from the surface of the base material 22 at the height W1 larger than the diameter of the antenna member 3. Accordingly, for example, when the second terminal electrode 24 and the second terminal connecting conductor 33 are connected by using the heater chip, it is possible to prevent the heater chip from coming into contact with the winding portion 31. Accordingly, the second terminal electrode 24 and the second terminal connecting conductor 33 can be easily connected. Further, since the heater chip can be prevented from coming into contact with the winding portion 31, the RFIC module 2 can be downsized. The minimum dimension of the tip of the heater chip is 1.0 mm, for example.

  Further, according to the present embodiment, the one end portion 31A of the winding portion 31 is closer to the second terminal electrode 24 than the first terminal electrode 23 and is connected to the first terminal electrode 23 by the first terminal connecting conductor 32. ing. As a result, the length of the portion of the first terminal connecting conductor 32 extending from the one end 31A of the winding portion 31 to the first terminal electrode 23 can be increased, and the resistance of the portion to the tensile force can be increased. . As a result, disconnection of the first terminal connecting conductor 32 can be suppressed.

  Further, according to the present embodiment, the other end portion 31B of the winding portion 31 is closer to the first terminal electrode 23 than the second terminal electrode 24, and is connected to the second terminal electrode 24 by the second terminal connecting conductor 33. Has been done. As a result, the length of the portion of the second terminal connecting conductor 33 extending from the other end 31B of the winding portion 31 to the second terminal electrode 24 can be increased, and the resistance of the portion to the tensile force can be increased. it can. As a result, disconnection of the second terminal connection conductor 33 can be suppressed.

  Further, according to the present embodiment, the RFIC module 2 is configured to have a longitudinal direction (X direction), and the winding portion 31 has the winding axis A1 extending in parallel with the longitudinal direction (X direction). It is provided to exist. Accordingly, the antenna member 3 can be wound around the RFIC module 2 with a larger number of turns. Further, the diameter of the winding portion 31 can be reduced, and the width in the directions (Y direction and Z direction) orthogonal to the extending direction (X direction) of the antenna member 3 can be reduced. As a result, the RFIC module 2 can be made inconspicuous and the RFID tag 1 that looks like a single thread can be provided.

  Further, according to the present embodiment, the winding portion 31 is arranged between the first terminal electrode 23 and the second terminal electrode 24 in the longitudinal direction (X direction). As a result, it is necessary to dispose the winding portion 31 across the connecting portion between the first terminal connecting conductor 32 and the first terminal electrode 23 and the connecting portion between the second terminal connecting conductor 33 and the second terminal electrode 24. Since it is not present, the winding portion 31 can be made difficult to unwind.

  Next, an example of a method of manufacturing the RFID module 2 will be described. 6 to 8 are cross-sectional views showing an example of a method for manufacturing the RFID module 2.

  First, as shown in FIG. 6, three layers of ceramic layers 22A-1 to 22A-3 to be the substrate 22A, two constraining layers 25-1, 25-2 and two constraining layers 25-3, It is arranged so as to be sandwiched by 25-4. In the ceramic layers 22A-1 to 22A-3 and the constraining layers 25-1 and 25-2, the metal conductors 23-1 to 23-5 to be the first terminal electrodes 23 and the metal conductor 24 to be the second terminal electrodes 24 are formed. -1 to 24-5 are formed in advance.

  Next, the ceramic layers 22A-1 to 22A-3 and the constraining layers 25-1 to 25-4 are laminated and fired. As a result, the ceramic layers 22A-1 to 22A-3 are integrated to form the substrate 22A. Further, the metal conductors 23-1 to 23-5 are integrated to form the first terminal electrode 23, and the metal conductors 24-1 to 24-5 are integrated to form the second terminal electrode 24. . At this time, the constraining layers 25-1 to 25-4 function to prevent the ceramic layers 22A-1 to 22A-3 from contracting in the surface direction.

  Next, the constraining layers 25-1 to 25-4 are removed by spraying water at high pressure on the constraining layers 25-1 to 25-4. As a result, as shown in FIG. 7, the substrate 22A provided with the first terminal electrodes 23 and the second terminal electrodes 24 protruding from the second main surface 22Ab is manufactured.

  Next, the RFIC element 21 is connected so as to straddle the first terminal electrode 23 and the second terminal electrode 24 located on the first main surface 22Aa of the substrate 22A.

  Next, the resin block body 22B is formed on the first main surface 22Aa of the substrate 22A so as to cover the RFIC element 21. As a result, the RFIC module 2 shown in FIG. 8 is manufactured.

  The RFIC module 2 is not limited to the above manufacturing method, and can be manufactured by various manufacturing methods. For example, a printed circuit board is used as the substrate 22A, and an electrode of the printed circuit board is plated and grown, so that the first terminal electrode 23 and the second terminal electrode 24 are provided so as to project from the second main surface 22Ab. 2 may be manufactured.

  The present invention is not limited to the above-mentioned embodiment, but can be carried out in various other modes. For example, in the above description, one end portion 31A of the winding portion 31 is closer to the second terminal electrode 24 than the first terminal electrode 23 and is connected to the first terminal electrode 23 by the first terminal connecting conductor 32. However, the present invention is not limited to this. For example, as shown in FIGS. 9 and 10, one end portion 31A of the winding portion 31 is closer to the first terminal electrode 23 than the second terminal electrode 24, and the first terminal connecting conductor 32 causes the first terminal electrode 23 May be connected to. Also with this configuration, the first terminal connecting conductor 32 and the first terminal electrode 23 are directly connected to each other, thereby increasing the degree of coupling between the antenna member 3 and the RFIC module 2 and further increasing the communication distance. be able to.

  Further, in the above description, the other end portion 31B of the winding portion 31 is closer to the first terminal electrode 23 than the second terminal electrode 24 and is connected to the second terminal electrode 24 by the second terminal connecting conductor 33. However, the present invention is not limited to this. For example, as shown in FIGS. 9 and 10, the other end portion 31B of the winding portion 31 is closer to the second terminal electrode 24 than the first terminal electrode 23, and the second terminal connecting conductor 33 allows the second terminal electrode 24 may be connected. With this configuration as well, the second terminal connection conductor 33 and the second terminal electrode 24 are directly connected to each other, thereby increasing the degree of coupling between the antenna member 3 and the RFIC module 2 and further increasing the communication distance. be able to.

  Further, in the above description, the cross-sectional shape of the first terminal electrode 23 and the second terminal electrode 24 protruding from the second main surface 22Ab of the substrate 22A is rectangular, but the present invention is not limited to this. For example, as shown in FIGS. 11 and 12, the first terminal electrode 23 is formed in an inverted trapezoidal shape or a stepped shape so as to have a deformable space below the inner upper edge 23A and the outer upper edge 23B. Good. That is, the first terminal electrode 23 has a base material surface 23C that is in contact with the base material 22 and a connection surface 23D that faces the base material surface 23C, and the length of the connection surface 23D in the longitudinal direction (X direction) is It may be larger than the length of the material surface 23C. According to this configuration, for example, when connecting the first terminal electrode 23 and the first terminal connecting conductor 32 using the heater chip, the first terminal electrode 23 is pressed by the heater chip, and as shown in FIG. It is possible to transform from the connection surface 23D side to the base material surface 23C side. This prevents the first terminal connecting conductor 32 located near the inner upper edge 23A and the outer upper edge 23B from being excessively thin (Z direction), and the first terminal connecting conductor 32 is disconnected. Can be suppressed. Similarly, as shown in FIGS. 11 and 12, the second terminal electrode 24 has a base material surface 24C that contacts the base material 22 and a connection surface 24D that faces the base material surface 24C, and has a longitudinal direction (X direction). ), The length of the connection surface 24D may be larger than the length of the base material surface 24C. As a result, the same effects as those described above for the first terminal electrode 23 can be obtained.

  The first terminal electrode 23 may have a recess 23E having a depth smaller than the diameter of the antenna member 3, as shown in FIGS. 14 and 15. According to this configuration, for example, when the first terminal electrode 23 and the first terminal connecting conductor 32 are connected using the heater chip, the first terminal connecting conductor 32 is arranged in the recess 23E, so that the first terminal connecting It is possible to prevent the conductor 32 from being pressed by the heater chip to excessively reduce the thickness (Z direction). Similarly, the second terminal electrode 24 may have a recess 24E having a depth smaller than the diameter of the antenna member 3, as shown in FIGS. 14 and 15. According to this configuration, the same effects as the effects described above for the first terminal electrode 23 can be obtained.

  Further, the RFIC module 2 and the antenna member 3 around the RFIC module 2 may be sealed with resin by potting or the like. With this configuration, it is possible to improve waterproofness, durability, and insulation of the RFID tag 1. Thereby, for example, even when the cloth product to which the RFID tag 1 is attached is washed, it is possible to prevent the RFIC module 2 from being damaged by being wet with water. Further, the wiring interval of the winding portion 31 can be maintained constant, and the communication characteristics of the RFID tag 1 can be stabilized.

  Further, in the above description, the first terminal electrode 23 and the second terminal electrode 24 are assumed to project from the second main surface 22Ab of the substrate 22A, but the present invention is not limited to this. The first terminal electrode 23 and the second terminal electrode 24 may be exposed from the second main surface 22Ab of the substrate 22A. For example, the first terminal electrode 23 and the second terminal electrode 24 may be flush with the second main surface 22Ab of the substrate 22A. However, when connecting the first or second terminal electrodes 23, 24 and the first or second terminal connecting conductors 32, 33 using a heater chip, be careful not to contact the heater chip with the antenna member 3. There is a need.

  Further, in the above description, the antenna member 3 includes the thread conductors 32A and 33A covered with the resin layers 32B and 33B, but the present invention is not limited to this. For example, the antenna member 3 may not be provided with the resin layers 32B and 33B and may be composed of only the thread-shaped conductor. However, in this case, for example, it is necessary to take care so that the filamentous conductors do not come into contact with each other to cause a short circuit.

  Further, in the above description, the RFID tag 1 is attached to a cloth product such as linen, but the object to which the RFID tag 1 is attached is not particularly limited. For example, the RFID tag 1 may be attached to a resin sheet.

  By properly combining the arbitrary embodiments of the aforementioned various embodiments, the effects possessed by them can be produced.

  Although the present invention has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. It is to be understood that such variations and modifications are included within the scope of the present invention as defined by the appended claims.

  INDUSTRIAL APPLICABILITY The present invention is particularly useful as an RFID tag attached to a cloth product such as linen because the communication distance can be increased.

1 RFID Tag 2 RFID Module 3 Antenna Member 21 RFIC Element 22 Base Material 22A Substrate 22A-1, 22A-2, 22A-3 Ceramic Layer 22Aa First Main Surface 22Ab Second Main Surface 22B Resin Block Body 23 First Terminal Electrode 23 -1,23-2,23-3,23-4,23-5 Metal conductor 23A Inner upper end edge 23B Outer upper end edge 23C Base material surface 23D Connection surface 23E Recess 24 Second terminal electrode 24-1,24-2 24-3, 24-4, 24-5 Metal conductor 24A Inner upper end edge 24B Outer upper end edge 24C Base material surface 24D Connection surface 24E Recessed portion 25-1, 25-2, 25-3, 25-4 Restraint layer 31 Winding Part 32 First terminal connecting conductor 32A Thread conductor 32B Resin layer 33 Second terminal connecting conductor 33A Thread conductor 33B Resin layer

Claims (7)

An RFIC module having an RFIC element, a base material incorporating the RFIC element, and a first terminal electrode and a second terminal electrode provided so as to be exposed from a surface of the base material and connected to the RFIC element, ,
A winding part helically wound on the surface of the base material, and a first terminal connection extending from one end of the winding part and partially connected directly to the first terminal electrode. An antenna member that is a thread-shaped conductor having a conductor and a second terminal connecting conductor that extends from the other end of the winding portion and is partially connected directly to the second terminal electrode;
An RFID tag including.   The RFID according to claim 1, wherein at least one of the first terminal electrode and the second terminal electrode has a height larger than a diameter of the antenna member and is provided so as to protrude from a surface of the base material. tag. One end of the winding portion is closer to the second terminal electrode than the first terminal electrode, and is connected to the first terminal electrode by the first terminal connecting conductor;
The other end of the winding portion is closer to the first terminal electrode than the second terminal electrode, and is connected to the second terminal electrode by the second terminal connecting conductor,
The RFID tag according to claim 1 or 2. The RFIC module is configured to have a longitudinal direction,
The RFID tag according to claim 1, wherein the winding portion is provided so that a winding axis extends parallel to the longitudinal direction.   The RFID tag according to claim 4, wherein the winding portion is arranged between the first terminal electrode and the second terminal electrode in the longitudinal direction. At least one of the first terminal electrode and the second terminal electrode has a base material surface in contact with the base material, and a connection surface facing the base material surface,
The length of the connection surface in the longitudinal direction is greater than the length of the substrate surface,
The RFID tag according to claim 4 or 5.   The RFID tag according to claim 1, wherein at least one of the first terminal electrode and the second terminal electrode has a recess having a depth smaller than a diameter of the antenna member.

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