JP2000105806A - Label type noncontact data carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide disposable noncontact data carrier which is hardly reusable when detached from an article after being attached and suitable for the purpose of protection against an illegal act. SOLUTION: A metal thin film formed on a base material by vapor deposition, etc., is etched into a specific pattern to form an antenna 2 for sending and receiving signals to and from external equipment without contacting. An IC chip 1 provided with bumps 1a is mounted on the antenna 2 with an anisotropic conductive adhesive, etc. Then an adhesive layer 4 which covers the IC chip 1 and antenna 2 is formed of an acryl-based adhesive, etc., on the base material 3 and a peeling liner 5 is laminated on the adhesive layer 4 and united in a sheet shape to manufacture a label type noncontact data carrier 20. Before the metal thin film is formed, a peeling agent such as silicone resin is applied in a specific area 6 on the base material 3 and an easy-to-break process is performed so that the metal thin film is easily broken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a contactless data carrier. More specifically, the present invention relates to a non-contact data carrier that has an IC chip as a main internal component and transmits and receives signals to and from an external device in a non-contact manner.

[0002]

2. Description of the Related Art A non-contact data carrier system includes a transponder called a non-contact data carrier attached to an article or the like, and an interrogator connected to a host.
It is characterized in that non-contact communication is performed between these transponders and the interrogator via transmission media such as magnetism, induction electromagnetic fields, and microwaves (radio waves). In this system, a transponder is attached to various articles, information about the articles is remotely read by an interrogator and provided to a host, thereby realizing information processing about the articles.

[0003] As an information transmission system of a non-contact data carrier system, an electromagnetic coupling system, an electromagnetic induction system, a microwave system, an optical communication system, and the like are generally known. Among these methods, in the electromagnetic coupling method, the electromagnetic induction method, and the microwave method, the energy of the transmission signal from the interrogator can be used as the driving power of the transponder. Since the transmission signal itself can be used as a drive source, there is no deterioration in response capability due to a decrease in battery output, as compared with other similar systems in which a drive source such as a battery needs to be built in the transponder. There is a great advantage that there is no limit on the use of the transponder due to battery life.

FIG. 3 shows an overall configuration of a contactless data carrier system. As shown in FIG. 1, the contactless data carrier system includes an interrogator 10 and a transponder (contactless data carrier) 20.

The interrogator 10 includes a main controller 11 for controlling the entire interrogator 10, an interface 11 for controlling data input / output with the host device, and tag information received from the non-contact data carrier 20. Read / store
A storage unit 13 such as a writable RAM, for converting transmission information from a parallel signal to a serial signal;
The signal conversion unit 14 converts the received signal from the serial signal 0 into a parallel signal from a serial signal, and converts the transmission signal into, for example, ASK (Am
Plitude Shift Keying), FSK (Frequency Shift)
t Keying) modulating section 15 for modulating the signal for transmission
And a demodulation unit 16 for demodulating a received signal;
7 and a receiving antenna 18.

The transponder (contactless data carrier) 20
A main control unit 21 for controlling the entire non-contact data carrier 20, a storage unit 22 such as an EEPROM for storing tag information which does not require a power supply backup, converting transmission information from a digital signal to an analog signal, and an interrogator 10; A signal converter 23 for converting a received signal from an analog signal to a digital signal, a modulator 24 for modulating a transmission signal into a signal for transmission by an ASK method, an FSK method or the like, and a demodulator 25 for demodulating a received signal. , A transmission antenna 26, and a reception antenna 27.

The basic communication procedure of this contactless data carrier system is as follows. First, the interrogator 10
An interrogation signal for reading tag information from the non-contact data carrier 20 is issued. The contactless data carrier 20
When it enters the receivable range of the interrogation signal, it receives it,
The tag information stored in the storage unit 22 is transmitted as a response signal. The interrogator 10 receives and decodes this response signal and sends it to the host device as tag identification information.

[0008] As described above, the transponder 20 (contactless data carrier) is mainly composed of an antenna for transmitting and receiving signals to and from the interrogator 10 and circuit components, and is designed in consideration of durability and environmental resistance. Usually, it has a structure in which internal components such as a transmitting / receiving antenna and circuit components are hermetically sealed with a resin layer or the like. As a transmitting / receiving antenna, a coil formed of a copper conductor is frequently used in terms of price and productivity, and as a circuit component, for example, a copper circuit pattern and a terminal portion are formed on a surface of an epoxy board, and an IC chip is formed on the circuit pattern. Is generally obtained by wire bonding. Usually, two end wires (conductor portions) of a coil formed of a copper wire having an outer diameter of 10 to 200 μm are connected to terminal portions of circuit components by welding or soldering. As a resin material for hermetically sealing these internal components, a thermoplastic resin such as a vinyl chloride resin, a polyethylene terephthalate resin, an acrylonitrile-butadiene-styrene copolymer resin, or an epoxy resin, a phenol resin,
A thermosetting resin such as a thermosetting resin such as a silicone resin is used.

One use of such a non-contact data carrier is in the security field where it is attached to an article to protect it from fraud such as theft or forgery. For example, a non-contact data carrier is attached to a high-priced product at a large-scale mass retailer or the like, and a crime such as so-called shoplifting or theft, in which unpaid products are taken out of the store, can provide a high economic effect. In the implementation, a non-contact data carrier that stores the tag information (for example, product name and price) of the product in the storage element is attached to the product to be protected by special mounting means, and it is installed at the entrance of the store. An interrogator is installed, and after receiving payment for the buyer, the store releases the non-contact data carrier and then delivers the product to the buyer.
For contactless data carriers that are supposed to be used in this way, high reliability and durability that make it difficult for the buyer to arbitrarily release and destroy the device are required first of all,
Development and improvement are being promoted from such a viewpoint.

[0010]

In a highly information-oriented society in recent years, the object of defense by a contactless data carrier is not only the article itself as described above, but also the article itself. Rather, it is often the information possessed by the article. For example, when the article is a vehicle running meter, information on the number of running distances is a target of defense. Therefore, it has been practiced to attach a non-contact data carrier to a meter case to prevent unauthorized rewinding.

Another example of a defense target is an electromagnetic record in, for example, rental electronic equipment.
Electromagnetic recording means that information is recorded and stored on a certain medium by a method that cannot be recognized by human perception, such as an electronic method or a magnetic method, such as an IC memory, a magnetic tape or a magnetic disk. Pointed out.

For example, in the case of an electromagnetic record such as an IC memory, the presence or absence of fraud cannot be determined from the appearance, so that information unique to the device, such as a serial number, is stored as tag information in a non-contact data carrier. To be mounted on an IC memory. If a legitimate IC memory with a non-contact data carrier is
Even if they are exchanged for fake or manipulated,
Since it is difficult to forge or falsify the unique tag information, an abnormality appears in the response signal to the interrogator. for that reason,
The exchange can be easily detected by the host device. Therefore, by mounting such a non-contact data carrier, unauthorized exchange can be prevented beforehand and damage caused by it can be minimized.

However, if the electronic device
When the C memory is taken out, the attached non-contact data carrier is illegally removed by any means, and the non-contact data carrier is re-installed in the forged or altered IC memory, and the non-contact data carrier mounted IC memory is returned to the device. No abnormality appears in the response signal. Therefore, the host device cannot detect the replacement, and the damage is increased.

The present invention has been made in view of such circumstances, and it is difficult to use it again when it is detached from an article after mounting, and it is a non-contact data carrier suitable for use in defense against fraud. Its purpose is to provide.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for reusing a non-contact data carrier by applying such a structure that if the non-contact data carrier is once applied and then peeled off, internal components are damaged. It was impossible.

That is, the noncontact data carrier in the form of a label according to the present invention comprises a circuit component including a storage element for storing information and a metal thin film formed on a base material. An internal component having an antenna for transmitting and receiving signals by contact, a non-contact data carrier main body having an adhesive layer sandwiching the internal component with the base material, and affixed to an outer surface of the adhesive layer And a release liner.

The label-like non-contact data carrier of the present invention is characterized in that the metal thin film is made of copper or aluminum having a thickness of 1 to 200 μm.

When a metal thin film having such a thickness is used as an antenna, when the release liner is removed and the non-contact data carrier in the form of a label once attached is to be peeled off, the metal thin film, that is, the antenna is damaged. Even if it is reattached, it causes a communication failure and becomes unusable.

In other words, in the label-like non-contact data carrier according to the present invention, the metal thin film has the non-contact data carrier main body and the non-contact data carrier main body attached thereto. It is characterized in that it has a breaking strength such that at least a part of the metal thin film can be broken by a minimum external force that resists the adhesive force acting between the adherends. With this configuration, when the label-shaped non-contact data carrier is peeled off, the metal thin film is surely destroyed, and communication cannot be performed at all.

Further, the label-like non-contact data carrier of the present invention is characterized in that a part between the substrate and the metal thin film is subjected to an easy destruction treatment for facilitating the destruction of the metal thin film. Features.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view schematically showing a configuration of a label-like non-contact data carrier of the present invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a view showing a method of using the non-contact data carrier. (A) is a diagram showing a state where the non-contact data carrier is stuck, and (b) is a diagram showing a state where the non-contact data carrier once stuck is peeled off.

As shown in FIG. 1 and FIG. 2, a non-contact data carrier 20 in the form of a label according to the present invention comprises an antenna 2 made of a metal thin film on a base material 3 and an IC 2 mounted on the metal thin film.
A C chip (storage element) 1 is sandwiched between the base material 3 and the adhesive layer 4 formed on the base material 3 (the part up to here forms the non-contact data carrier body 20a), and the adhesive layer is formed. A release liner 5 is attached to the outer surface of the sheet 4, and has a structure integrated into a sheet. In the present embodiment, only the IC chip 1 is used as a circuit component, and no other circuit component is mounted.

The substrate 3 is not particularly limited as long as it can form a metal thin film. For example, various types of resin materials such as a substrate for printed wiring such as an epoxy base material and an epoxy-glass base material, and a thermosetting resin such as a phenol resin, and a thermoplastic resin such as polyethylene, polypropylene, polyester, and vinyl chloride resin. The substrate may be a substrate or a substrate made of paper or synthetic paper. The thickness is not particularly limited, but a thickness of 0.01 to 1 mm is used.

At this time, when the non-contact data carrier 20 is to be peeled off, the metal thin film is easily broken or broken, and the non-contact data carrier 20 is made flexible so that the whole is flexible. Preferably, 3 is used.

An antenna 2 for transmitting and receiving signals without contact with an external device is formed on the substrate 3. The antenna 2 is made of, for example, a conductive metal thin film such as copper or aluminum, and is formed in a fixed pattern, a coil shape such as a circular or elliptical shape, a square circular shape, or the like so as to configure the antenna 2. Examples of the method include a method of forming a predetermined pattern by etching after bonding a metal thin film on the base material 3 using an adhesive, and a method of forming a predetermined pattern by vapor deposition of metal in a vacuum.

The thickness of the metal thin film is 1 to 200 μm.
m, preferably 5 to 35 μm. If the thickness is smaller than 1 μm, the resistance of the metal thin film increases, and the function as the antenna 2 cannot be sufficiently exhibited. On the other hand, if the thickness is larger than 200 μm, the non-contact data carrier 20 is less likely to be cut when peeling.

The metal thin film has a breaking strength at which at least a part of the metal thin film can be broken by a minimum external force which resists the adhesive force acting between the attached non-contact data carrier main body 20a and the adherend. It is formed as follows. In other words, in the non-contact data carrier 20 of the present invention, when it is to be peeled off after being once attached to the adherend,
An external force is applied which resists the adhesive force acting between the non-contact data carrier main body 20a and the surface of the adherend. As a result, the base material 3
The bonding force between the metal thin film formed thereon and the base material 3 cannot withstand the external force, and the metal thin film is peeled and finally broken. Therefore, communication with the outside is disabled, and the non-contact data carrier 20 cannot be reused.

At this time, in order to easily cause metal breakdown, for example, FIG.
It is preferable that the area 6 surrounded by the broken line is subjected to the easy destruction processing. That is, as described above, the metal thin film is destroyed by the external force that resists the adhesive force when the metal thin film is to be peeled off. There may be a case where it can be attached back to the material 3. In order to prevent this, between the base material 3 and the metal thin film, partial easy destruction treatment is performed. By doing so, the metal thin film in the portion subjected to the easy destruction treatment is easily peeled off from the base material 3 while the metal thin film remains in the base material 3 in the remaining portion. In this manner, the metal thin film in the portion subjected to the easy destruction processing is peeled off, and the antenna 2 is reliably destroyed.

There is no particular limitation on the easy destruction treatment. For example, a part of an adhesive for adhering a metal thin film to the substrate 3 may not be applied, or a silicone or fluororesin may be applied on the substrate 3. Applying a release agent may be mentioned.

Further, an IC chip 1 constituting a circuit component is mounted on the metal thin film. Although various methods for mounting the IC chip 1 are conceivable, for example, there is a method in which bumps 1a are provided on a package IC and thermocompression-bonded to a metal thin film via an anisotropic conductive adhesive or conductive paste. In addition to the above method, gold plating is applied to a desired position on the metal thin film and wire bonding is performed on the IC chip with a gold wire, an aluminum wire, or the like, or the IC chip is previously bonded to a predetermined circuit pattern and a terminal portion. A chip-on-board (COB) is mounted on an epoxy substrate or a metal frame on which is formed, and the terminal portion and the metal thin film are connected with an anisotropic adhesive, a conductive paste, solder, or the like,
Wire bonding is also conceivable. In this case, the internal components including the IC chip 1 are arranged on substantially the same plane together with the antenna 2 and a conductor connected to the antenna 2. By doing so, it is possible to configure the thin non-contact data carrier 20.

It is preferable that the IC chip 1 is sealed with a thermosetting resin by a method such as potting, transfer molding, or printing to protect the IC chip 1.

Next, an adhesive layer 4 is overlaid so as to cover the antenna 2 and the IC chip 1 mounted on the base material 3. As the pressure-sensitive adhesive (pressure-sensitive adhesive) for forming the pressure-sensitive adhesive layer 4, for example, various pressure-sensitive adhesives such as acrylic, rubber, polyester, and silicone can be used. The thickness of the pressure-sensitive adhesive layer 4 needs to be sufficient to protect the internal components including the IC chip 1 and is generally 1 to 1000 μm.
m is preferable, and more preferably 200 to 500 μm.
m.

The material of the release liner 5 is not particularly limited, but a release paper in which a silicone resin, a fluororesin, or the like is coated on the surface of a paper having a thickness of about 10 to 300 μm as a release agent is inexpensive and preferably used. it can.

As shown in FIG. 3 (a), the non-contact data carrier 20 manufactured as described above has a main body 20a, for example, an IC memory such as a ROM or various articles after the release liner 5 is peeled off. Is attached to various adherends 9.

Thereafter, when the user intends to remove the substrate 3 from the adherend 9 by holding the base 3 of the main body, as shown in FIG. The antenna 2 is cut off and remains in a state where a part of the antenna 2 is adhered to the adherend 9, so that the antenna 2 cannot be reused.

Thus, the non-contact data carrier 20 of the present invention can be of a disposable type that cannot be reused when it is removed from the article after being mounted. Furthermore, since it is thin and lightweight and can be manufactured at low cost, it can be suitably used as the disposable non-contact data carrier 20 for preventing fraud.

[0037]

Next, an embodiment will be described.

(Example) First, an aluminum thin film was formed in a predetermined pattern by vapor deposition on one surface of a sheet-like base material made of polyethylene terephthalate resin having a thickness of 125 μm to form an antenna. At this time, silicone was partially applied to the base material in advance at a predetermined position where the metal thin film was to be deposited, and the easy peeling treatment was performed. Next, an IC having a bump size of 2 × 3 mm and a thickness of 250 μm was mounted on the antenna 2 using an anisotropic conductive adhesive.

Thereafter, an acrylic pressure-sensitive adhesive was applied to a thickness of 300 μm.
m to form a pressure-sensitive adhesive layer. On this pressure-sensitive adhesive layer, a release paper having a thickness of 100 μm was adhered as a release liner, and was integrated into a sheet by applying pressure to obtain a label-shaped non-contact data carrier.

The release paper was peeled off from the thus obtained non-contact data carrier of this embodiment, and the remaining main body was affixed to a predetermined position on the surface of an IC memory such as a ROM as an adherend. Then, when removing the base material to remove the attached non-contact data carrier,
Part of the antenna remained on the adherend, and the antenna was disconnected, so it could not be reused.

[0041]

As described above, according to the present invention,
When the non-contact data carrier is removed from the article or the like after being mounted, it is difficult to use the non-contact data carrier again, and it is possible to provide a non-contact data carrier that is suitable for use in defense against fraud and that can be manufactured at low cost. .

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a contactless data carrier of the present invention;

FIG. 2 is a sectional view showing the configuration of the contactless data carrier of FIG. 1;

3A and 3B are diagrams showing a method of using the non-contact data carrier of FIG. 1, wherein FIG. 3A shows a state where the non-contact data carrier is attached, and FIG. A diagram showing a state in which

FIG. 4 is a block diagram showing a general overall configuration of a contactless data carrier system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... IC chip (storage element) 1a ... Bump 2 ... Antenna for transmission / reception made of a metal thin film 3 ... Base material 4 ... Adhesive layer 5 ... Peeling liner 6 ... Area easily destructed 9 ... … Adherend

Claims (4)

[Claims] 1. An internal unit including a circuit component including a storage element for storing information and an antenna made of a metal thin film formed on a base material and transmitting and receiving signals to and from an external device in a non-contact manner. A non-contact data carrier main body including a component, an adhesive layer sandwiching the internal component by the base material, and a release liner attached to an outer surface of the adhesive layer. Contactless data carrier. 2. The metal thin film has a thickness of 1 to 200 μm.
The non-contact data carrier according to claim 1, wherein the non-contact data carrier is made of copper or aluminum. 3. The metal thin film is formed by at least a part of the metal thin film by a minimum external force against an adhesive force acting between the non-contact data carrier main body and the adherend to which the non-contact data carrier main body is attached. 2. A non-contact data carrier in the form of a label according to claim 1, wherein the non-contact data carrier has a breaking strength at which the data carrier can be broken. 4. The non-contact data carrier according to claim 1, wherein an easy destruction treatment for facilitating destruction of the metal thin film is performed on a part between the base material and the metal thin film. .