JP6590128B1 - RFID tag - Google Patents

Abstract

Provided is an RFID tag that can be attached to a fabric product and that can increase the communication distance. An RFID tag according to the present invention includes an RFIC element, a base material incorporating 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 are connected to the RFIC element, An RFIC module having a winding portion helically wound on the surface of the substrate, and a first portion extending from one end portion of the winding portion and directly connected to the first terminal electrode. An antenna member that is a thread-like conductor having a one-terminal connection conductor and a second terminal connection conductor that extends from the other end of the winding portion and that is partly connected directly to the second terminal electrode.

Description

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

  Conventionally, an RFID (Radio-Frequency IDentification) tag used by being attached to a cloth product such as linen is known. For example, the RFID tag described in Patent Document 1 includes a main antenna sewn on a fabric product and a loop antenna connected to a semiconductor device and disposed in the vicinity of the main antenna. When the main antenna and the loop antenna are magnetically coupled, the RFID tag performs wireless communication.

Japanese Patent No. 5912398

  However, the RFID tag described in Patent Document 1 has a problem that the coupling degree between the main antenna and the loop antenna is small and it is difficult to ensure 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 make the communication distance longer in an RFID tag that can be attached to a cloth product.

In order to achieve the above object, an RFID tag according to an aspect of the present invention includes:
An RFIC module comprising: 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 the 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 portion of the winding portion and partly connected directly to the first terminal electrode An antenna member that is a thread-like conductor having a conductor and a second terminal connection conductor that extends from the other end of the winding portion and a part of which is directly connected to the second terminal electrode;
Is provided.

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

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 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 partial expanded sectional view of the RFID tag of FIG. FIG. 2 is an equivalent circuit diagram of the RFID tag in FIG. 1. It is sectional drawing which shows an example of the manufacturing method of RFID module. FIG. 7 is a cross-sectional view showing a step that follows FIG. 6. FIG. 8 is a cross-sectional view showing a step that follows FIG. 7. It is a side view which permeate | transmits the inside 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 a 1st or 2nd terminal electrode. It is sectional drawing which shows the 2nd modification of a 1st or 2nd terminal electrode. It is sectional drawing which shows the state by 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 by 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 includes:
An RFIC module comprising: 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 the 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 portion of the winding portion and partly connected directly to the first terminal electrode An antenna member that is a thread-like conductor having a conductor and a second terminal connection conductor that extends from the other end of the winding portion and a part of which is directly connected to the second terminal electrode;
Is provided.

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

  Note that at least one of the first terminal electrode and the second terminal electrode may be provided so as to protrude from the surface of the base material at a height larger than the diameter of the antenna member. According to this configuration, for example, when connecting the terminal electrode and the terminal connection conductor using the heater chip, the heater chip is prevented from coming into contact with the winding portion, and the terminal electrode and the terminal connection conductor are easily connected. can do. Further, since the heater chip can be prevented from coming into contact with the winding portion, the RFIC module can be reduced in size.

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

  The RFIC module may be configured in a shape having a longitudinal direction, and the winding portion may be provided such that a winding axis extends in parallel to the longitudinal direction. According to this configuration, the antenna member can be wound around the RFIC module with a larger number of turns. In addition, 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.

  The winding portion may be disposed between the first terminal electrode and the second terminal electrode in the longitudinal direction. According to this configuration, it is not necessary to arrange the winding portion across the connection portion between the first terminal connection conductor and the first terminal electrode and the connection portion between the second terminal connection conductor and the second terminal electrode. The winding part can be made difficult to unravel.

  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 larger than the length of the substrate surface. According to this configuration, for example, when the terminal electrode and the terminal connection conductor are connected using the heater chip, the terminal electrode is pressed by the heater chip and can be deformed from the connection surface side to the base material surface side. Thereby, it can suppress that the thickness of the terminal connection conductor located in the vicinity of a terminal electrode becomes thin too much, and can suppress that a terminal connection conductor disconnects.

  Further, 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 the terminal electrode and the terminal connection conductor are connected using the heater chip, the terminal connection conductor is pressed by the heater chip by disposing the terminal connection conductor in the recess. Can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment. In the drawings, substantially the same members are denoted by the same reference numerals.

(Embodiment)
Hereinafter, an RFID tag according to an 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 UHF band communication frequency. In the present embodiment, the RFID module 2 is configured in a shape having 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 short 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 incorporating the RFIC element 21, a first terminal electrode 23 and a second terminal 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.

  Each of the first terminal electrode 23 and the second terminal electrode 24 has one end connected to the RFIC element 21 and the other end exposed at the second main surface 22Ab facing the first main surface 22Aa of the substrate 22A. 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 protrude 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 cross-sectional shapes of the first terminal electrode 23 and the second terminal electrode 24 protruding from the second main surface 22Ab of the substrate 22A are rectangular. A height W1 at which the first terminal electrode 23 and the second terminal electrode 24 protrude 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 with an arbitrary sewing pattern. The antenna member 3 is made of a metal such as copper or stainless steel, for example.

  In the present embodiment, the antenna member 3 is composed of a thread-like conductor covered with an insulating material. The antenna member 3 is composed of a thread-like conductor covered with, for example, 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 thread 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 filamentous conductors instead of a single filamentous conductor. The antenna member 3 may be a slit tape yarn, a covering yarn, a coding yarn, or the like.

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

  The winding part 31 is a part wound helically on the surface of the base material 22. In the present embodiment, the winding portion 31 is disposed between the first terminal electrode 23 and the second terminal electrode 24 in plan view. As shown in FIG. 3, the winding portion 31 is provided so that the winding axis A <b> 1 extends in 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, but is substantially parallel. It may be provided so as to extend (including substantially parallel). The length of the winding part 31 in the direction of the winding axis A1 is, for example, 1.5 mm.

  The first terminal connection conductor 32 is a part that extends from one end 31 </ b> A of the winding part 31 and is partly 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, as shown in FIG. 4, a part of the resin layer 32B covering the thread-like conductor 32A of the first terminal connection conductor 32 is melted by the heat of the heater chip, and the thread-like conductor 32A and the first terminal electrode 23 are directly connected. Connected. Further, in this case, as shown in FIG. 3, the filamentary 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. The thickness (Z direction) becomes thinner. For example, the thickness of the thread-like conductor 32A is 20 μmm. For this reason, for example, when the heat of the heater chip applied to the connecting portion between the thread conductor 32A and the first terminal electrode 23 is cooled by the air, the thread conductor 32A contracts, and a tensile force is applied to the thread conductor 32A. The thread-like conductor 32A is easily disconnected.

  Therefore, in the present embodiment, 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 connection conductor 32. . That is, the first terminal connecting conductor 32 starts from the one end 31A of the winding part 31 and extends in the direction opposite to the direction from the other end 31B toward the one end 31A in the extending direction of the winding axis A1. It is provided as follows. Thereby, the length of the part of the 1st terminal connection conductor 32 extended from 31 A of one end parts of the coil | winding part 31 to the 1st terminal electrode 23 is lengthened, and the tolerance with respect to the tensile force of the said part is improved. Further, by increasing the length of the portion of the first terminal connection conductor 32 extending from the one end portion 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 intersects the inner upper edge 23A and the outer upper edge 23B of the first terminal electrode 23 can be made closer to a right angle. Thereby, the length in which the first terminal connection conductor 32 contacts the inner upper edge 23A and the outer upper edge 23B can be further shortened, and the first terminal connection conductor 32 is disconnected at the intersection with the inner upper edge 23A. That can be suppressed.

  The second terminal connection conductor 33 is a portion that extends from the other end portion 31 </ b> B of the winding portion 31 and is partly 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, a part of the resin layer 33B covering the thread-like conductor 33A of the second terminal connecting conductor 33 is melted by the heat of the heater chip as described with reference to FIG. 4, and the thread-like conductor 33A and the second terminal are melted. The electrode 24 is directly connected. Further, in this case, as shown in FIG. 3, the thread-shaped conductor 33A is crushed by the pressure of the heater chip, the outer shape (X direction and Y direction) of the thread-shaped conductor 33A in plan view is expanded, and the thickness of the thread-shaped conductor 33A is increased. The thickness (Z direction) becomes thinner. For example, the thickness of the thread conductor 33A is 20 μmm. For this reason, for example, when the heat of the heater chip applied to the connection portion between the thread conductor 33A and the second terminal electrode 24 is cooled by air and the thread conductor 33A contracts, and thus the tensile force is applied to the thread conductor 33A. The thread-like conductor 33A is easily disconnected.

  Therefore, in the present embodiment, the other end 31B of the winding part 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 connection conductor 33. Yes. That is, the second terminal connecting conductor 33 extends in the direction opposite to the direction from the one end 31A toward the other end 31B in the extending direction of the winding axis A1, starting from the other end 31B of the winding 31. It is provided to do. Thereby, the length of the part of the 2nd terminal connection conductor 33 extended from the other end part 31B of the coil | winding part 31 to the 2nd terminal electrode 24 is lengthened, and the tolerance with respect to the tensile force of the said part is improved. . Further, by increasing the length of the portion of the second terminal connection conductor 33 extending from the other end portion 31B of the winding portion 31 to the second terminal electrode 24, as shown in FIG. The angle at which the two-terminal connection conductor 33 and the inner upper edge 24A of the second terminal electrode 24 intersect can be made closer to a right angle. Accordingly, the length of contact between the second terminal connection conductor 33 and the inner upper edge 24A of the second terminal electrode 24 can be further shortened, and the second terminal connection conductor 33 is broken 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 connection conductor 32 that extends outward from the first terminal electrode 23 is set to approximately ¼ of the wavelength of the communication frequency used by the RFID module 2. ing. Similarly, the length of the portion of the second terminal connection conductor 33 that extends outward from the second terminal electrode 24 is set to approximately 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 ½ (for example, 14 cm) of the wavelength. Thereby, the antenna member 3 functions as a half-wave dipole antenna.

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

  In the present embodiment, a portion extending outward from the first terminal electrode 23 of the first terminal connection conductor 32 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 to the inductance element and functions as a power supply unit that supplies power.

  According to this embodiment, since the antenna member 3 which is a thread-like conductor is provided, the RFID tag 1 can be attached to a fabric product. Further, since the first terminal connection conductor 32 and the first terminal electrode 23 and the second terminal connection conductor 33 and the second terminal electrode 24 are directly connected, the antenna member 3 and the RFIC module 2 are coupled. The communication distance can be increased by increasing the degree.

  In addition, according to the present embodiment, the first terminal electrode 23 is provided so as to protrude from the surface of the base member 22 at a height W1 that is larger than the diameter of the antenna member 3. Thereby, for example, when the first terminal electrode 23 and the first terminal connection conductor 32 are connected using the heater chip, the heater chip can be prevented from contacting the winding portion 31. Thereby, the 1st terminal electrode 23 and the 1st terminal connection conductor 32 can be connected easily.

  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 a height W1 that is larger than the diameter of the antenna member 3. Thereby, for example, when the second terminal electrode 24 and the second terminal connection conductor 33 are connected using the heater chip, the heater chip can be prevented from contacting the winding portion 31. Thereby, the 2nd terminal electrode 24 and the 2nd terminal connection conductor 33 can be connected easily. Further, since the heater chip can be prevented from coming into contact with the winding portion 31, the RFIC module 2 can be reduced in size. In addition, the minimum dimension of the front-end | tip part of a heater chip is 1.0 mm, for example.

  Further, according to the present embodiment, the one end portion 31 </ b> A 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 connection conductor 32. ing. Thereby, the length of the part of the 1st terminal connection conductor 32 extended from 31 A of one end parts of the coil | winding part 31 to the 1st terminal electrode 23 can be lengthened, and the tolerance with respect to the tensile force of the said part can be made high. . As a result, the disconnection of the first terminal connection conductor 32 can be suppressed.

  According to the present embodiment, the other end 31 </ b> B 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 connection conductor 33. Has been. Thereby, the length of the part of the 2nd terminal connection conductor 33 extended from the other end part 31B of the coil | winding part 31 to the 2nd terminal electrode 24 can be lengthened, and the tolerance with respect to the tensile force of the said part can be made high. 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 in a shape having a longitudinal direction (X direction), and the winding portion 31 has the winding axis A1 extending in parallel to the longitudinal direction (X direction). It is provided to exist. Thereby, the antenna member 3 can be wound around the RFIC module 2 with a larger number of turns. Further, the diameter of the winding part 31 can be reduced, and the width in the direction (Y direction and Z direction) orthogonal to the extending direction (X direction) of the antenna member 3 can be reduced. As a result, it is possible to provide the RFID tag 1 that looks like a single thread without making the RFIC module 2 inconspicuous.

  Further, according to the present embodiment, the winding part 31 is disposed between the first terminal electrode 23 and the second terminal electrode 24 in the longitudinal direction (X direction). Thereby, it is necessary to arrange the winding portion 31 across the connection portion between the first terminal connection conductor 32 and the first terminal electrode 23 and the connection portion between the second terminal connection conductor 33 and the second terminal electrode 24. Therefore, it is possible to make the winding part 31 difficult to unravel.

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

  First, as shown in FIG. 6, three ceramic layers 22A-1 to 22A-3 to be a substrate 22A, two constraining layers 25-1 and 25-2, and two constraining layers 25-3, It arrange | positions so that it may pinch | interpose with 25-4. In the ceramic layers 22A-1 to 22A-3 and the constraining layers 25-1 and 25-2, metal conductors 23-1 to 23-5 to be the first terminal electrode 23 and metal conductor 24 to be the second terminal electrode 24. -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 fired in a laminated state. Thereby, the ceramic layers 22A-1 to 22A-3 are integrated to form the substrate 22A. In addition, 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 suppress the ceramic layers 22A-1 to 22A-3 from contracting in the plane direction.

  Next, the constraining layers 25-1 to 25-4 are removed by spraying water on the constraining layers 25-1 to 25-4 at a high pressure. As a result, as shown in FIG. 7, the substrate 22 </ b> A provided with the first terminal electrode 23 and the second terminal electrode 24 protruding from the second main surface 22 </ b> Ab 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, a resin block body 22B is formed on the first main surface 22Aa of the substrate 22A so as to cover the RFIC element 21. Thereby, 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, an RFIC module in which a printed circuit board is used as the substrate 22A and the electrodes of the printed circuit board are plated and grown so that the first terminal electrode 23 and the second terminal electrode 24 protrude from the second main surface 22Ab. 2 may be manufactured.

  In addition, this invention is not limited to the said embodiment, It can implement in another various aspect. For example, in the above description, the one end portion 31 </ b> A 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 connection conductor 32. However, the present invention is not limited to this. For example, as shown in FIGS. 9 and 10, one end 31 </ b> A of the winding portion 31 is closer to the first terminal electrode 23 than the second terminal electrode 24, and the first terminal electrode 23 is formed by the first terminal connection conductor 32. May be connected. Also with this configuration, the first terminal connection conductor 32 and the first terminal electrode 23 are directly connected, so that the degree of coupling between the antenna member 3 and the RFIC module 2 is increased and the communication distance is further increased. be able to.

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

  In the above description, the cross-sectional shapes of the first terminal electrode 23 and the second terminal electrode 24 protruding from the second main surface 22Ab of the substrate 22A are 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 stepped shape so as to have a deformable space below the inner upper edge 23A and the outer upper edge 23B. Also good. That is, the first terminal electrode 23 has a base material surface 23C in contact with the base material 22 and a connection surface 23D facing the base material surface 23C. The length of the connection surface 23D in the longitudinal direction (X direction) It may be larger than the length of the material surface 23C. According to this configuration, for example, when the first terminal electrode 23 and the first terminal connecting conductor 32 are connected using a heater chip, the first terminal electrode 23 is pressed by the heater chip, as shown in FIG. Further, it can be deformed from the connection surface 23D side to the base material surface 23C side. Accordingly, the first terminal connection conductor 32 is disconnected by suppressing the thickness (Z direction) of the first terminal connection conductor 32 located in the vicinity of the inner upper edge 23A and the outer upper edge 23B from being excessively thinned. 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. ) May be larger than the length of the base material surface 24C. Thereby, the effect similar to the effect mentioned above about the 1st terminal electrode 23 can be produced.

  Further, 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. According to this configuration, for example, when the first terminal electrode 23 and the first terminal connection conductor 32 are connected using the heater chip, the first terminal connection conductor 32 is disposed in the recess 23E, thereby connecting the first terminal connection conductor 32 to the first terminal connection conductor 32. It can be suppressed that the conductor 32 is pressed by the heater chip and the thickness (Z direction) becomes excessively small. 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. According to this configuration, the same effects as those described above for the first terminal electrode 23 can be achieved.

  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. According to this configuration, the waterproofness, durability, and insulation of the RFID tag 1 can be improved. Thereby, for example, even when the cloth product with the RFID tag 1 attached is washed, it is possible to prevent the RFIC module 2 from getting wet and malfunctioning. Moreover, the communication characteristic of the RFID tag 1 can be stabilized by keeping the wiring interval of the winding part 31 constant.

  In the above description, the first terminal electrode 23 and the second terminal electrode 24 protrude from the second main surface 22Ab of the substrate 22A. However, 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 connection conductors 32, 33 using a heater chip, care should be taken so that the heater chip does not contact the antenna member 3. There is a need.

  In the above description, the antenna member 3 includes the thread conductors 32A and 33A covered with the resin layers 32B and 33B. However, the present invention is not limited to this. For example, the antenna member 3 may not be provided with the resin layers 32 </ b> B and 33 </ b> B, and may be configured only with a thread-like conductor. However, in this case, for example, care must be taken so that the filamentous conductors do not come into contact with each other to cause a short circuit.

  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.

  It is to be noted that, by appropriately combining any of the various embodiments, the effects possessed by them can be produced.

  While the invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.

  Since the communication distance can be further increased, the present invention is particularly useful as an RFID tag attached to a cloth product such as linen.

DESCRIPTION OF SYMBOLS 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 edge 23B Outer upper edge 23C Base material surface 23D Connection surface 23E Recessed portion 24 Second terminal electrode 24-1, 24-2, 24-3, 24-4, 24-5 Metal conductor 24A Inner upper edge 24B Outer upper edge 24C Substrate surface 24D Connection surface 24E Recess 25-1, 25-2, 25-3, 25-4 Constraining layer 31 Winding Part 32 First terminal connecting conductor 32A Threaded conductor 32B Resin layer 33 Second terminal connecting conductor 33A Threaded conductor 33B Resin layer

Claims (6)

An RFIC module comprising: 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 the 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 portion of the winding portion and partly connected directly to the first terminal electrode An antenna member which is a dipole antenna and is a filamentous conductor having a conductor and a second terminal connection conductor extending from the other end of the winding portion and partly connected directly to the second terminal electrode When,
Equipped with a,
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 connection conductor,
The other end of the winding portion is adjacent to the first terminal electrode than the second terminal electrode, it is connected to the second terminal electrode by the second terminal connecting conductor, RFID tags.   2. The RFID according to claim 1, wherein at least one of the first terminal electrode and the second terminal electrode is provided so as to protrude from a surface of the base material at a height larger than a diameter of the antenna member. tag. The RFIC module is configured in a shape having a longitudinal direction,
The winding unit, the winding shaft is provided so as to extend parallel to the longitudinal direction, RFID tag according to claim 1 or 2. The RFID tag according to claim 3 , wherein the winding portion is disposed 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 3 or 4 .   6. 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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