JP2006091964A - Double-sided non-contact ic sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-sided non-contact IC sheet for deciding which of a plurality of non-contact communication IC units has information been written or read, even when the non-contact communication IC units whose frequencies are identical are close on the front surface and back surface to each other, in one double-sided non-contact communication IC sheet provided with the non-contact communication units on the both sides. <P>SOLUTION: This double-sided non-contact IC sheet is characterized by laminating a non-permeable layer and an insulating layer on the both sides of an electromagnetic shield material, and arranging non-contact communication IC units including a non-contact communication antenna and an IC on the both sides. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a double-sided non-contact IC sheet including a plurality of non-contact communication IC units including a non-contact communication antenna and an IC.

  When an IC tag equipped with a general non-contact communication antenna is used on a metal surface, reflection of magnetic flux (a collection of magnetic force lines indicating the strength and direction of magnetic force) is generated and affects electromagnetic induction. Can not be used.

  However, by disposing a sheet-like magnetic material with high magnetic permeability, even when an IC tag equipped with a non-contact communication antenna is attached close to a conductive member such as metal, the magnetic flux is attenuated by the conductive member. It is known that communication distance can be greatly suppressed and the communicable distance can be extended.

  On the other hand, IC cards using an IC chip are widely used for the purpose of storing and processing important and large amounts of data such as cash cards and ID cards. In recent years, not only contact-type IC cards that are used by connecting terminal electrodes of IC cards and external devices, but also built-in antennas, and exchange data with external devices in a non-contact manner by radio waves or electrostatic coupling. The use of non-contact type IC cards is increasing, and the demand is increasing for reasons such as no need to insert and remove the cards and reduction of maintenance of external devices. In addition, there is also a composite IC card having a contact type function having a terminal electrode of the former and a non-contact type function of communicating data by wireless communication for the purpose of supporting a more versatile use with a single card. It is considered.

  For example, as in Patent Document 1, a magnetically reacting metal used in an electronic article monitoring marker is provided in an extension of the antenna of a non-contact information record carrier provided with an integrated circuit chip and a non-contact communication antenna. An element for a composite tag having both functions of a marker and a non-contact information record carrier is known.

  Also, a method for holding a plurality of different non-contact ICs on one side of a substrate as in Patent Document 2 is disclosed.

The patent literature is as follows.
JP 2003-168090 A JP 2002-366916 A

  However, as in Patent Document 2, for example, a method of manufacturing a composite tag configured by providing a plurality of tags on the same surface on an insulating substrate, both of which are close to the base material on one side of the base material It is intended to read from and write to an IC tag equipped with a non-contact communication antenna.

  For this reason, when there is individual information on the front and back of a sheet such as a card, and there is an IC tag with a separate non-contact communication antenna on the front and back, it cannot be individually written and read.

As described above, a double-sided sheet such as a double-sided card in the case where individual information is present on both the front and back sides of a single card or the like sheet has not been invented or studied. In addition, when a plurality of identical frequency non-contact IC tags are close to each other on the front and back, it is difficult to determine which IC tag is writing or reading information.

  The present invention has been made to solve the above-mentioned problem, and when a plurality of same-frequency non-contact IC tags are close to each other on the front and back sides, it is determined which IC tag information is written to or read from. It is an object of the present invention to provide an IC tag that can be used.

  The present invention according to claim 1 is provided with a non-contact communication IC unit including a non-contact communication antenna and an IC on both surfaces, in which a non-permeable layer and an insulating layer are sequentially laminated on both surfaces of the electromagnetic shielding material. A double-sided non-contact IC sheet characterized by the above is provided.

  The present invention according to claim 2 provides the double-sided non-contact IC sheet according to claim 1, wherein the non-magnetic layer is made of a ferrite-containing sheet.

  According to a third aspect of the present invention, there is provided a double-sided non-contact IC sheet according to the first or second aspect, which is a card shape.

  The present invention according to claim 4 provides a double-sided non-contact IC sheet according to claim 1 or 2, wherein the double-sided non-contact IC sheet has a tag shape.

  The present invention according to claim 5 provides the double-sided non-contact IC sheet according to any one of claims 1 to 4, wherein both non-contact communication IC units are covered with a protective layer. .

  The present invention according to claim 6 provides the double-sided non-contact IC sheet according to any one of claims 1 to 5, wherein the display relating to both non-contact communication IC units is displayed on the opposite side. is there.

  The present invention according to claim 7 provides the double-sided non-contact IC sheet according to any one of claims 1 to 6, wherein the communication frequencies of both non-contact communication IC units are the same frequency. .

  The present invention according to claim 8 provides the double-sided non-contact IC sheet according to any one of claims 1 to 6, wherein the non-contact communication IC units have different communication frequencies. .

  The present invention according to claim 9 provides the double-sided non-contact IC sheet according to any one of claims 1 to 8, wherein both the non-contact communication IC units can record information.

  According to the present invention, a single-sided non-contact IC sheet having both sides of a non-contact communication IC unit represented by an IC tag or IC card including a non-contact communication antenna and an IC Provided is a double-sided non-contact IC sheet capable of discriminating whether a non-contact communication IC unit having the same frequency is written in or read from which non-contact communication IC unit even when the non-contact communication IC units of the same frequency are close to each other. be able to.

When a non-contact communication IC unit having two types of non-contact communication antennas on the front and back sides is formed on a single sheet and card, and a double-sided non-contact IC sheet in which both non-contact communication IC units are in close proximity is used. In this case, it is possible to realize a system that can read and write the specified IC tag information mutually without being affected by electromagnetic induction by other IC tags.

  Thus, for example, by adopting a configuration in which a double-sided non-contact IC sheet having a non-contact communication antenna according to the present invention is provided as a double-sided IC tag sheet in a binder-storing file, a binder-storing file that can be attached and detached with a spread is obtained. Can store different data.

  Double-sided non-contact IC sheets with non-contact communication antennas with different frequencies or double-sided non-contact IC sheets with non-contact communication antennas of the same frequency can be mounted on the front and back, so two types with one card RFID systems are available.

  The double-sided non-contact IC sheet of the present invention is an example of a double-sided non-contact IC card, and FIG. 1 is a cross-sectional view showing an embodiment when the present invention is a non-contact IC card, and FIG. This will be described below with reference to FIG. The double-sided non-contact IC card of this embodiment includes non-contact IC units 12 and 22 on both sides, and has an aluminum foil 14, ferrite-containing sheets 15 and 25, insulating films 16 and 26, protective resins 17 and 27, and an adhesive 18. An example will be described below.

  Here, the case where aluminum foil 14 is used as the electromagnetic shielding material, ferrite-containing sheets 15 and 25 are used as the non-magnetic layer, and insulating films 16 and 26 are used as the insulating layer will be described below. Each material does not necessarily have to be a plate having no flexibility, and any material may be used as long as it is flexible.

  For example, as shown in FIG. 1, ferrite-containing sheets 15 and 25 on both surfaces of the aluminum foil 14, insulating films 16 and 26 on the outside, non-contact IC units 12 and 22 on the outside, and protective resin 17 on both surfaces, 27, the protective resin 17, and the peripheral part where 27 mutually contacts can take the form which comprises the adhesive agent 18. FIG.

  The non-contact IC units 12 and 22 may be attached as they are, but an inlet or IC tag attached to a support is easy to attach and is preferable in terms of operation reliability and quality. Therefore, in the following description, it will be described as an IC tag, but it is not an inlet or a tag, and any process can be applied to the non-contact communication antenna and the IC chip regardless of their manufacturing methods.

  When an IC tag equipped with a general non-contact communication antenna is used on a metal surface, reflection of magnetic flux (a collection of magnetic force lines indicating the strength and direction of magnetic force) is generated and affects electromagnetic induction. Utilizing the weakness that it cannot be used for, a structure in which a resin sheet containing ferrite powder and an insulating film are laminated on an IC tag equipped with a non-contact communication antenna on both surfaces of a metal layer such as aluminum foil A non-contact communication antenna comprising a surface and a back surface configured to laminate a resin sheet containing ferrite powder and an insulating film on an IC tag having a non-contact communication antenna A double-sided IC tag card equipped with a double-sided IC tag sheet and a non-contact communication antenna, even if the front and back side IC tags are close to each other, Without the influence of the magnetic induction, reads the IC tag information that is specific to each other, it is possible to perform the writing.

  The electromagnetic wave shielding material is generally a metal layer, and aluminum, copper, iron, steel, silver, gold or the like can be used, but aluminum foil is generally used from the viewpoint of cost.

As the non-permeable layer, a resin sheet containing ferrite powder having a high magnetic permeability is used,
Examples include polyolefins such as polyethylene and polypropylene, polyamides such as nylon, polyesters such as polyethylene terephthalate, thermoplastics such as polycarbonate, chlorinated polyethylene, and chlorinated polypropylene.

  The insulating layer may be an insulating film such as a general plastic film and is not particularly limited.

  The double-sided non-contact IC sheet of the present invention is distinguished by the surface base material, the shape, and the standard, and the surface base material may be a different one depending on the front. It is surface-treated with a resin that enables printing, such as paper, synthetic paper, and plastic. Or the card base material which added the transparent protective layer which protects the rewrite recording layer which can rewrite visible information can be provided. Conventionally, in the case of contact type IC cards that are used by connecting terminal electrodes of IC cards and external devices, plastic cards with magnetic tape on one side and materials for plastic cards that are generally used for IC cards can be used. It is characterized by being.

  In the case of a stationary reader / writer, the information printed on the front surface of the sheet and card is held by an IC tag equipped with a non-contact communication antenna on the back surface, and the information printed on the back surface is stored on the front surface. An existing system can be used by holding information by an IC tag equipped with a non-contact communication antenna.

  In the case of a handy reader / writer, the information printed on the front side of the sheet and card is held by the IC tag equipped with the non-contact communication antenna on the front side, and the information printed on the back side. Since an IC tag having a non-contact communication antenna on the back side holds information, an existing system can be utilized.

  An IC tag having a non-contact communication antenna having a different frequency or an IC tag having a non-contact communication antenna having the same frequency is mounted on both sides of the sheet and the card.

  Next, the configuration of the non-contact IC unit 30 will be described with reference to FIGS. In this case, the non-contact IC unit will be described below in the form of an inlet. FIG. 3 is a perspective view showing each layer separated in order to explain the configuration of the module layer. In the figure, the non-contact IC unit 30 is configured as a single card by superimposing a plurality of layer structure members, and includes a front surface resin sheet 303, an inlet 301, and a back surface resin sheet 304.

  As materials for the front surface resin sheet 303 and the back surface resin sheet 304, resins such as polyvinyl chloride, ABS (acrylonitrile butadiene styrene), PET (polyethylene terephthalate), PC (polycarbonate), PE (polyimide), and epoxy are mainly used. Although it is used, other materials may be used as long as they can be formed into a sheet such as resin, synthetic paper, and paper generally used for printed wiring boards. The resin may be mixed with glass fibers, glass beads, titanium oxide, calcium carbonate, or the like for the purpose of adjusting strength and color.

  The layer structure shown in FIG. 3 is assembled by a general plastic card manufacturing method such as a laminating method, but may be configured by an injection molding method or may be configured by applying an adhesive between the layers. Good.

For the front surface resin sheet 303 and the back surface resin sheet 304, materials for plastic cards generally used in conventional plastic cards with magnetic tape and IC cards can be used.

  Next, FIG. 4 is a plan view of the inlet 301 shown in FIG. The inlet 301 is configured by connecting the antenna coil 6 and the module 7 via the connection pad 8, and the module 7 has the IC chip 9 mounted on the printed circuit board 5. This IC chip 9 is composed of an integrated circuit such as a CPU and a rewritable nonvolatile memory (for example, E2PROM), and commuter pass information indicating a boarding section, a valid period, etc. is recorded as update data in the memory. At the same time, unique data for identifying the cardholder is recorded in advance.

  As the antenna coil 6, a copper wire wound in a loop or a copper foil pattern formed by etching a copper foil is used. As the material of the antenna coil 6, it is appropriate to use inexpensive copper, but the material is not limited to this, and other materials are used in addition to metals such as gold, silver, and aluminum as long as they have conductivity. It is also possible. For example, carbon may be used, and a conductive paste or the like may be printed and patterned. However, if the direct-current resistance value of the antenna coil 6 is large, the characteristics as a transmission / reception antenna deteriorate, so it is necessary to select a material in consideration of electrical characteristics.

  The antenna coil 6 is configured by a general coil winding method such as a spiral shape. In the case of a spiral shape, it can be patterned by etching or printing. Further, by using a rectangular wire, a spiral shape can be easily formed even with a winding, and the aspect ratio of the conductor cross section can be improved as compared with etching or printing.

  The module 7 is configured by mounting the IC chip 9 on the printed circuit board 5 as described above. As the mounting method, various well-known IC chip mounting methods such as COB (Chip On Board), flip chip, and TAB (Tape Automated Bonding) methods can be applied.

  As a material for the printed board 5, a glass epoxy board is usually used, but a film such as polyimide or a metal used for an IC lead frame may be used. The IC chip 9 is protected by a sealing resin made of an epoxy resin or the like. As the sealing method, for example, various well-known methods for resin sealing of IC such as potting method and transfer mold method are used. In addition, a capacitor may be mounted on the module 7. As the capacitor in this case, for example, a ceramic chip capacitor is used.

  For the connection between the antenna coil 6 and the module 7 and the connection between the capacitor and the module 7, for example, a well-known method for connecting electronic components such as soldering welding or connection using a conductive adhesive is used.

  The module layer 30 configured as described above receives power supply via the antenna coil 6 and writes and reads data.

  Next, a method for using the double-sided non-contact IC sheet according to this embodiment will be described. First, it is assumed that one of a plurality of functions, for example, a prepaid function and a credit sales function, is selected and used. In this case, one is the former function and the other is the second function.

  An IC unit having the former function is provided on the A side of the card, and a display indicating the second function is provided. On the other hand, on the B surface which is the back surface of the A surface, an IC unit having a second function is provided and a display showing the former function is provided. This is because the IC unit that realizes the function is generally opposite to the surface that the user sees during use.

  For example, when the former function is used, it is used by holding the A side on the communication side and the B side on the visible side. When using the second function, reverse it. In this case, the former IC unit and the former IC unit are electrically isolated by the insulating function of the separator, magnetically by the non-permeability of the separator, and electromagnetically by the electromagnetic shielding property. The use of one function does not affect the use of the other function.

  By using this double-sided non-contact IC sheet, for example, by adopting a configuration in which a double-sided non-contact IC sheet having a non-contact communication antenna according to the present invention is provided as a double-sided IC tag sheet in a binder-storing file, It becomes a binder save file, and different data can be saved on both the front and back pages.

  The present invention relates to a double-sided non-contact IC sheet including a plurality of non-contact communication IC units including a non-contact communication antenna and an IC.

It is sectional drawing which shows the Example in case this invention is a non-contact IC card. It is a plane position conceptual diagram of FIG. It is the perspective view which isolate | separated and showed each layer in order to demonstrate the structure of the module of the same FIG. It is a plane position conceptual diagram of the inlet of FIG.

Explanation of symbols

5 Printed circuit board 6 Antenna coil 7 Module 8 Connection pad 9 IC chip 11, 21 Non-contact IC tag 14 Aluminum foil 15, 25 Ferrite-containing sheet 16, 26 Insulating film 17, 27 Protective resin 18 Adhesive 301 Inlet 303 Surface resin sheet 304 Back side resin sheet

Claims (9)

  A double-sided non-contact IC sheet comprising a non-contact communication IC unit including a non-contact communication antenna and an IC on both sides, wherein a non-permeable layer and an insulating layer are sequentially laminated on both sides of the electromagnetic shielding material. .   The double-sided non-contact IC sheet according to claim 1, wherein the non-magnetic layer is made of a ferrite-containing sheet.   The double-sided non-contact IC sheet according to claim 1 or 2, wherein the double-sided non-contact IC sheet has a card shape.   The double-sided non-contact IC sheet according to claim 1 or 2, which has a tag shape.   The both-side non-contact IC sheet according to any one of claims 1 to 4, wherein both non-contact communication IC units are covered with a protective layer.   The double-sided non-contact IC sheet according to any one of claims 1 to 5, wherein the display regarding both non-contact communication IC units is displayed on the opposite side.   The double-sided non-contact IC sheet according to claim 1, wherein the communication frequencies of both the non-contact communication IC units are the same frequency.   The double-sided non-contact IC sheet according to any one of claims 1 to 6, wherein the non-contact communication IC units have different communication frequencies.   9. Both-side non-contact IC sheets according to claim 1, wherein both non-contact communication IC units can record information.

Images