JP4913529B2 - RFID media - Google Patents

Description

  The present invention relates to an RFID medium in which information can be written and read in a non-contact state, and more particularly to a technique for realizing the flexibility of the RFID medium.

  In recent years, with the progress of the information society, information is recorded on a card, and information management and settlement using the card are performed. In addition, information is recorded on a label attached to a product or the like, and management of the product or the like using this label is also performed.

  In information management using such a card, label, or tag, a contactless IC chip on which information can be written to or read from the card, label, or tag without contact is mounted. IC cards, non-contact type IC labels, or non-contact type IC tags are rapidly spreading due to their excellent convenience. In particular, in a non-contact type IC label, since it does not inadvertently separate from the adherend after that, it is stuck to a delivery item, for example, at a delivery base of the delivery item. It is used as an effective means for reliably managing the adhered adherend, such as managing the delivery history of the delivery by writing information on the IC chip.

  FIGS. 5A and 5B are diagrams showing an example of a general non-contact type IC label, where FIG. 5A is a view seen from the surface, and FIG.

  In this example, as shown in FIG. 5, an antenna 212 made of a coiled conductive material is formed on a resin film 213 and connected to the antenna 212. The adhesive 240 is applied to the back surface of the inlet 210 on which the IC chip 211 capable of writing and reading is mounted. In general, a surface sheet on which information is printed may be attached to the surface of the inlet portion 210.

  The non-contact type IC label 201 configured as described above is used by being attached to an adherend with an adhesive 240. When a reader / writer for writing and reading information is brought close to the IC chip 211, a magnetic field generated by a current flowing through the antenna of the reader / writer acts on the antenna 212, whereby a current flows through the antenna 212, and the antenna When the current that has flowed to 212 is supplied to the IC chip 211, information is written from the reader / writer to the IC chip 211, or information written to the IC chip 211 is read by the reader / writer. .

  The adherend surface to which the non-contact type IC label as described above is attached is not necessarily a flat surface. For example, as described in Patent Document 1, it may be curved and attached to a cylindrical side surface. In that case, by using a member having flexibility such as a resin film 213 as shown in FIG. 5 as a member constituting the non-contact type IC label, it can be attached to a curved surface.

  Here, in non-contact type IC labels, in recent years, in order to reduce the size and ensure a communicable distance, a fine IC chip that performs communication using a microwave band is increasingly used. When such a fine IC chip is used, a communicable distance of the IC chip can be extended by connecting a conductive antenna to the IC chip, and a metal plate is attached so as to face the antenna. As a result, the communicable distance of the IC chip can be further extended by functioning the metal plate as a reflector.

  6A and 6B are diagrams showing an example of a non-contact type IC label on which an IC chip that performs communication using a microwave band is mounted. FIG. 6A is a diagram viewed from the surface, and FIG. It is AA 'sectional drawing shown in FIG.

  In this example, as shown in FIG. 6, two wirings 312 a and 312 b constituting the antenna 312 are formed on the resin film 313 so as to be arranged in series with each other. What is the inlet part 310 on which the IC chip 311 that is connected to one end of the wirings 312a and 312b and can write and read information in a non-contact state is mounted, and the surface on which the antenna 312 of the resin film 313 is formed? The expanded polystyrene plate 320 adhered to the entire surface of the opposite surface, the metal plate 330 adhered to the entire surface of the expanded polystyrene plate 320 opposite to the inlet portion 310, and the opposite side of the expanded metal plate 320 of the metal plate 330 from the expanded polystyrene plate 320. It is comprised from the adhesive 340 apply | coated to the whole surface. In general, a surface sheet on which information is printed may be attached to the surface of the inlet portion 310.

The non-contact type IC label 301 configured as described above is used by being attached to an adherend with an adhesive 340. When a reader / writer for writing and reading information to and from the IC chip 311 is brought close to the inlet unit 310 side, the antenna 312 resonates with the radio wave generated by the current flowing through the antenna of the reader / writer. When current flows and the current flowing through the antenna 312 is supplied to the IC chip 311, information is written from the reader / writer to the IC chip 311, or information written to the IC chip 311 is read by the reader / writer. Or read out. At this time, the metal plate 330 functions as a reflection plate, and radio waves generated by the current flowing through the antenna of the reader / writer and radio waves transmitted from the antenna 312 to the reader / writer are reflected by the metal plate 330, and the reader / writer The communicable distance with the writer is extended. Note that if the antenna 312 and the metal plate 330 are too close to each other, the antenna 312 and the metal plate 330 function as the same member, and information can be written to the IC chip 311 even if the reader / writer is brought close to the antenna 312. In order to avoid this, the foamed polystyrene plate 320 is interposed between the inlet 310 and the metal plate 330. Moreover, the non-contact type IC label 301 can be provided with flexibility by using the polystyrene foam plate 320 to be interposed between the inlet 310 and the metal plate 330 as described above.
JP 2005-267227 A

  The non-contact type IC label 301 shown in FIG. 6 may be attached to a curved surface as in the case shown in FIG.

  FIG. 7 is a cross-sectional view of the non-contact type IC label 301 shown in FIG. 6 in a curved state.

  In the non-contact type IC label 301 shown in FIG. 6, the foamed polystyrene plate 320 interposed between the resin film 313 and the metal plate 330 has stretchability. However, the foamed polystyrene plate 320 has stretchability. The non-contact type IC label 301 is sandwiched between the resin film 313 and the metal plate 330, that is, the both surfaces of the non-contact type IC label 301 are made of a non-stretchable material. Therefore, the resin film 313 on the outside in the curved state does not stretch, and the metal plate 330 on the inside in the curved state does not shrink, so that the length on the outside in the curved state is the same as the length on the inside. The state does not change and the metal plate 330 becomes loose. Therefore, as shown in FIG. 7, when it is not neatly curved and is adhered to a curved surface, the appearance is impaired, and the adhered surface is in a state of being waved and easily peeled off from the adherend. There is a problem.

  The present invention has been made in view of the problems of the conventional techniques as described above, and an object of the present invention is to provide an RFID medium that can be curved smoothly while having the function of a reflector. .

In order to achieve the above object, the present invention provides:
An IC chip in which a conductive antenna is formed on a flexible base material and connected to the antenna and capable of writing and / or reading information in a non-contact state via the antenna. A mounted inlet portion, a reflector disposed on a side of the base substrate opposite to the surface on which the antenna is formed, and stretchable, and interposed between the inlet portion and the reflector plate In an RFID medium having a non-conductive plate material
The reflector may have a plurality of slits extending in at least one direction,
The slit is not formed in a region facing the IC chip .

  In the present invention configured as described above, when the reflecting plate side is curved with the inside as the inner side, the adjacent regions through the plurality of slits of the reflecting plate act so as to be dense, The length of the reflecting plate becomes shorter than the length of the base substrate on the outside of the curved state, so that the reflecting plate on the inner side of the curved state does not stagnate and bends neatly become.

The slit is in Ikoto not been formed on the IC chip area opposed to, the IC chip is prevented from being damaged by the region where the IC chip is mounted is bent.

  As described above, in the present invention, the non-conductive plate material having elasticity is sandwiched between the inlet portion and the reflection plate, and the reflection plate is provided with a plurality of slits extending in at least one direction. Although it has the function of a reflector, when it is curved with the reflector side inside, it acts so that the distance between adjacent regions through the plurality of slits of the reflector is close and can be curved beautifully. it can.

  In addition, in the case where the slit is not formed in the region facing the IC chip, it is possible to avoid the IC chip from being damaged by bending the region where the IC chip is mounted. .

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing a first embodiment of a non-contact type IC label that is an RFID medium of the present invention, where (a) is a view from the surface, and (b) is A shown in (a). It is -A 'sectional drawing.

  In this embodiment, as shown in FIG. 1, two wirings 12a and 12b constituting the antenna 12 are formed on a resin film 13 serving as a base substrate so as to be arranged in series with each other. At the same time, an inlet portion 10 is formed which is connected to one end of the two wirings 12a and 12b and is mounted with an IC chip 11 capable of writing and reading information in a non-contact state, and an antenna 12 of a resin film 13 is formed. The foamed polystyrene plate 20 which is a non-conductive plate material adhered to the entire surface on the side opposite to the coated surface, and the reflective plate adhered to the entire surface opposite to the inlet portion 10 of the foamed polystyrene plate 20 It is comprised from the metal plate 30 and the adhesive 40 apply | coated to the whole surface of the metal plate 30 on the opposite side to the foamed polystyrene board 20, and the metal plate 30 is orthogonal to the longitudinal direction of the metal plate 30. That a plurality of slits 31 extending in direction is formed. In general, a surface sheet on which information is printed may be attached to the surface of the inlet portion 10.

  The resin film 13 is made of a material such as PET (polyethylene terephthalate) and has flexibility, and two wirings 12a and 12b constituting the antenna 12 are formed on the resin film 13 by etching or printing. Has been. The IC chip 11 is connected to one end of the two wirings 12a and 12b facing each other, and is fixed on the resin film 13 in a state of being connected to the wirings 12a and 12b by, for example, ACP (anisotropic conductive adhesive) or the like. ing.

  The expanded polystyrene board 20 has elasticity and is stuck to the resin film 13 and the metal plate 30 by the adhesive (not shown) apply | coated to the front and back.

  The metal plate 30 is made of a copper plate or the like and has flexibility due to its plate shape. Further, the plurality of slits 31 formed extending in the direction orthogonal to the longitudinal direction of the metal plate 30 each have a fine width and are not formed in a region facing the IC chip 11.

  The non-contact type IC label 1 configured as described above is manufactured by cutting a plurality of non-contact type IC labels 1 into a non-contact type IC label 1 after being manufactured in a state of being arranged in a lattice shape. Manufactured.

  First, in order to form a plurality of inlet portions 10 on a film sheet constituting the resin film 13, a plurality of antennas 12 are formed in a lattice shape, and an IC chip 11 is mounted on each of the antennas 12 to manufacture an inlet sheet. To do.

  Next, the inlet sheet, the polystyrene sheet constituting the foamed polystyrene plate 20, and the metal sheet constituting the metal plate 30 are bonded together.

  Next, the slit 31 is formed in the metal sheet, and the adhesive 40 is applied on the metal sheet on which the slit 31 is formed.

  Thereafter, the inlet sheet, the styrene sheet, and the metal sheet bonded together are cut into the shape of the non-contact type IC label 1 to produce a plurality of non-contact type IC labels 1.

  In the non-contact type IC label 1 manufactured as described above, it is used by being attached to an adherend with an adhesive 40. When a reader / writer that writes information to or reads information from the IC chip 11 is brought close to the inlet 10 side, the antenna 12 resonates with the radio wave generated by the current flowing through the antenna of the reader / writer. When current flows and the current flowing through the antenna 12 is supplied to the IC chip 11, information is written from the reader / writer to the IC chip 11, or information written in the IC chip 11 is read by the reader / writer. Or read out. At this time, the metal plate 30 functions as a reflector, and the radio wave generated by the current flowing through the antenna of the reader / writer or the radio wave transmitted from the antenna 12 to the reader / writer is reflected by the metal plate 30 to be read / written. The communicable distance with the writer is extended. However, if the antenna 12 and the metal plate 30 are too close to each other, the antenna 12 and the metal plate 30 function as the same member, and information can be written to the IC chip 11 even if the reader / writer is brought close to the antenna 12. Or reading cannot be performed. In order to avoid this, a polystyrene foam plate 20 is interposed between the inlet 10 and the metal plate 30. The polystyrene plate 20 preferably has a thickness of 2 mm or more so that the antenna 12 and the metal plate 30 do not function as the same member.

  The non-contact type IC label 1 described above is not limited to being attached to a flat surface but may be attached to a curved surface. Below, an effect | action when the non-contact type IC label 1 mentioned above is affixed on the curved surface is demonstrated.

  FIG. 2 is a diagram for explaining the operation when the non-contact type IC label 1 shown in FIG. 1 is attached to a curved surface, and (a) shows the non-contact type IC label 1 curved. Sectional drawing in a state, (b) is an external view which shows the state stuck on the curved surface.

  When the non-contact type IC label 1 shown in FIG. 1 is curved with the metal plate 30 side as an inner side in order to adhere to the curved surface, the resin film 13 and the metal plate 30 have flexibility, and Since the foamed polystyrene plate 20 has stretchability, each of them is curved, and as shown in FIG. 2A, the width of the plurality of slits 31 formed in the metal plate 30 is reduced, respectively. It acts so that the space | interval of the area | region which adjoins through the slit 31 of 30 becomes close. As a result, the length in the longitudinal direction of the metal plate 30 on the inside in the curved state is shorter than the length in the longitudinal direction of the resin film 13 on the outside in the curved state, and the metal plate 30 does not become loose. Will be nicely curved.

  As shown in FIG. 2 (b), the curved non-contact type IC label 1 can be adhered to the side surface of the article 2 having a columnar shape with an adhesive 40, and the adhesion surface is a metal plate. The bumps of 30 do not cause a wave, and the article 2 is not easily peeled off.

  At this time, since the slit 31 is not formed in the region of the metal plate 30 facing the IC chip 11, the region where the IC chip 11 is mounted is less likely to be bent. It is avoided that the IC chip 11 is damaged by bending.

(Second Embodiment)
FIGS. 3A and 3B are diagrams showing a second embodiment of a non-contact type IC label which is an RFID medium of the present invention, where FIG. 3A is a diagram seen from the surface, and FIG. 3B is A shown in FIG. It is -A 'sectional drawing.

  In the present embodiment, as shown in FIG. 3, two wirings 112a and 112b constituting the antenna 112 are formed on the resin film 113 serving as a base substrate with a predetermined interval so as to be arranged in series with each other. At the same time, an inlet portion 110 on which an IC chip 111 capable of writing and reading information in a non-contact state and mounted on one end of the two wirings 112a and 112b and an antenna 112 of a resin film 113 are formed. The foamed polystyrene plate 120, which is a non-conductive plate material adhered to the entire surface on the side opposite to the coated surface, and the reflective plate adhered to the entire surface of the foamed polystyrene plate 120 opposite to the inlet 110. The metal plate 130 and the pressure-sensitive adhesive 140 applied to the entire surface of the metal plate 130 opposite to the foamed polystyrene plate 120 are provided. 0, the longitudinal direction and the slits 131a extending respectively in a direction perpendicular to that of the metal plate 130, 131b are formed. In general, a surface sheet on which information is printed may be attached to the surface of the inlet portion 110.

  The resin film 113 is made of a material such as PET and has flexibility, and two wirings 112a and 112b constituting the antenna 112 are formed on the resin film 113 by etching, printing, or the like. The IC chip 111 is connected to one end of the two wirings 112a and 112b facing each other, and is fixed on the resin film 113 while being connected to the wirings 112a and 112b by, for example, ACP or the like.

  The expanded polystyrene plate 120 has elasticity and is stuck to the resin film 113 and the metal plate 130 by an adhesive (not shown) applied to the front and back.

  The metal plate 130 is made of a copper plate or the like and has flexibility due to its plate shape. In addition, the slits 131a and 131b formed to extend in the longitudinal direction of the metal plate 130 and the direction perpendicular to the metal plate 130 have fine widths, respectively, and are not formed in a region facing the IC chip 111.

  After the non-contact type IC label 101 configured as described above is manufactured in a state where a plurality of non-contact type IC labels 101 are arranged in a lattice shape, similar to the one shown in the first embodiment. It is manufactured by cutting into non-contact type IC labels 101 one by one.

  The non-contact type IC label 101 configured as described above is used by being attached to an adherend with an adhesive 140. When a reader / writer for writing and reading information to and from the IC chip 111 is brought close to the inlet unit 110 side, the antenna 112 resonates with the radio wave generated by the current flowing through the antenna of the reader / writer. When current flows and the current flowing through the antenna 112 is supplied to the IC chip 111, information is written from the reader / writer to the IC chip 111, or information written to the IC chip 111 is read by the reader / writer. Or read out. The functions of the metal plate 130 and the polystyrene foam plate 120 are the same as those shown in the first embodiment.

  The non-contact type IC label 101 described above is not limited to being attached to a flat surface but may be attached to a curved surface. Below, an effect | action in case the non-contact-type IC label 101 mentioned above is affixed on the curved surface is demonstrated.

  FIG. 4 is a diagram for explaining the operation when the non-contact type IC label 101 shown in FIG. 3 is attached to a curved surface. FIG. 4 (a) shows the non-contact type IC label 101 in the longitudinal direction. A sectional view in a curved state, (b) is a sectional view in a state in which the non-contact type IC label 101 is curved in a direction perpendicular to the longitudinal direction, and (c) is a curved state in the direction shown in (a). It is an external view which shows the state stuck on the curved surface, (d) is an external view which shows the state stuck on the curved surface in the state curved in the direction shown in (b).

  When the non-contact type IC label 101 shown in FIG. 3 is adhered to the curved surface, the resin film 113 and the metal plate 130 are flexible when the metal plate 130 side is bent in the longitudinal direction. And since the foamed polystyrene board 120 has a stretching property, these each curve, and also it extends in the direction orthogonal to the longitudinal direction of the metal plate 130 to the metal plate 130 as shown to Fig.4 (a). Thus, the widths of the plurality of slits 131a are narrowed, and the distance between adjacent regions via the slits 131a in the longitudinal direction of the metal plate 130 is increased. As a result, the length in the longitudinal direction of the metal plate 130 on the inside in the curved state is shorter than the length in the longitudinal direction of the resin film 113 on the outside in the curved state, and the metal plate 130 does not become loose. Will be nicely curved.

  Further, even when the non-contact type IC label 101 shown in FIG. 3 is attached to a curved surface, the resin film 113 and the metal plate are also bent even when the metal plate 130 side is bent in a direction perpendicular to the longitudinal direction. Since 130 is flexible and the foamed polystyrene plate 120 is stretchable, each of these is curved, and as shown in FIG. The width of the plurality of slits 131b formed to extend in the longitudinal direction of the metal plate 130 is narrowed, and the distance between the adjacent regions via the slits 131b in the direction orthogonal to the longitudinal direction of the metal plate 130 is increased. . Thereby, the length in the direction orthogonal to the longitudinal direction of the metal plate 130 on the inner side of the curved state is shorter than the length in the direction orthogonal to the longitudinal direction of the resin film 113 on the outer side of the curved state. It will bend nicely without smoldering.

  As shown in FIGS. 4C and 4D, the non-contact type IC label 101 that is curved in this way is curved in any direction vertically and horizontally with respect to the side surfaces of the articles 102 and 103 having a cylindrical shape. Even if it exists, it can be stuck by the adhesive 140, and the sticking surface does not appear to wave due to the bumps of the metal plate 130, and is difficult to peel off from the article 2.

  At this time, since the slits 131a and 131b are not formed in the region facing the IC chip 111 of the metal plate 130, the region where the IC chip 111 is mounted is less likely to be bent, and thereby the non-contact type IC label. It is avoided that the IC chip 111 is damaged by curving 101.

  In the two embodiments described above, the slits 31, 131 a, 131 b have been described with an example having a fine width, but the metal plates 30, 130 are simply cut into a straight line. It may be a thing.

  In the above-described two embodiments, in order to maintain the distance between the antennas 12 and 112 and the metal plates 30 and 130, the polystyrene foam is used as a plate material interposed between the inlet portions 10 and 110 and the metal plates 30 and 130. Although the example using the plates 20 and 120 has been described as an example, the plate material interposed between the inlet portions 10 and 110 and the metal plates 30 and 130 is the distance between the antennas 12 and 112 and the metal plates 30 and 130. However, it is not limited to this as long as it is made of a non-conductive material having elasticity.

  In the two embodiments described above, the description has been given by taking as an example the case where the metal plates 30 and 130 are provided on the opposite side of the inlet portions 10 and 110 with respect to the foamed polystyrene plates 20 and 120 as the reflection plates. Solid printing is applied to the foamed polystyrene plates 20 and 120 or a plate material replacing the same using conductive ink, or a plate material such as a resin film is attached to the foamed polystyrene plates 20 and 120, and solid printing is performed using the conductive ink on the plate material. You may comprise a reflector by giving.

  In the above-described two embodiments, the non-contact type IC label 1, 101 that can be attached to the adherend with the adhesives 40, 140 has been described as an example. The present invention can also be applied to a non-contact type IC tag that does not have a non-contact type IC tag that can be used in a curved state.

It is a figure which shows 1st Embodiment of the non-contact-type IC label used as the RFID medium of this invention, (a) is the figure seen from the surface, (b) is the AA 'cross section shown to (a) FIG. It is a figure for demonstrating an effect | action when the non-contact type IC label shown in FIG. 1 is stuck on the curved surface, (a) is sectional drawing in the state which curved the non-contact type IC label, b) is an external view showing a state of being attached to a curved surface. It is a figure which shows 2nd Embodiment of the non-contact-type IC label used as the RFID medium of this invention, (a) is the figure seen from the surface, (b) is the AA 'cross section shown to (a) FIG. It is a figure for demonstrating an effect | action when the non-contact type IC label shown in FIG. 3 is affixed on the curved surface, (a) is a cross section in the state which curved the non-contact type IC label in the longitudinal direction (B) is a cross-sectional view of a non-contact type IC label bent in a direction perpendicular to the longitudinal direction. (C) is affixed to a curved surface in a state bent in the direction shown in (a). (D) is an external view showing a state of being attached to a curved surface in a state curved in the direction shown in (b). It is a figure which shows an example of a common non-contact-type IC label, (a) is the figure seen from the surface, (b) is A-A 'sectional drawing shown to (a). It is a figure which shows an example of the non-contact-type IC label with which the IC chip which communicates using a microwave band is mounted, (a) is the figure seen from the surface, (b) is A shown to (a) It is -A 'sectional drawing. It is sectional drawing in the state which curved the non-contact type IC label shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 Non-contact type IC label 2,102,103 Article 10,110 Inlet part 11,111 IC chip 12,112 Antenna 12a, 12b, 112a, 112b Wiring part 13,113 Resin film 20,120 Styrofoam plate 30,130 Metal plate 31, 131a, 131b Slit 40, 140 Adhesive

Claims (1)

An IC chip in which a conductive antenna is formed on a flexible base material and connected to the antenna and capable of writing and / or reading information in a non-contact state via the antenna. A mounted inlet portion, a reflector disposed on a side of the base substrate opposite to the surface on which the antenna is formed, and stretchable, and interposed between the inlet portion and the reflector plate In an RFID medium having a non-conductive plate material
The reflector may have a plurality of slits extending in at least one direction,
The RFID medium , wherein the slit is not formed in a region facing the IC chip .

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