KR100686598B1 - Radio frequency identification tag with printed antenna - Google Patents

Abstract

An RFID(Radio Frequency IDentification) tag equipped with a printed antenna is provided to form diverse shapes of antennas in minimum thickness, reduce a manufacturing cost, and facilitate a manufacturing process whitout decreasing a reception rate of the RFID tag by making the thickness of the antenna in the minimum thickness and facilitating formation of diverse antenna shapes. An RFID chip(21) is attached to a double folded substrate(22) and stores managed article information communicated with a terminal. The antennas(30,30') are formed on the substrate by printing conductive ink. A spacer(40) is equipped with electrical insulation between the antennas to prevent the reception rate of the RFID tag from being lowered. A coating(50) prevents the antennas from electrically contacting with a managed article and is formed to increase anti-humidity and durability. An adhesive coating(60) forms an adhesive layer(61) to one side of the coating and protects an outer part of the adhesive layer from the outside. The antennas are combined in parallel at an upper and lower side of the spacer.

Description

Radio frequency identification tag with printed antenna

1 is an exploded perspective view of a radio frequency identification label according to the present invention;

Figure 2 is a perspective view of a radio frequency identification label according to the present invention, Figure 2a is a perspective view of a radio frequency identification label in a state where the adhesive coating is attached, Figure 2b is a radio frequency identification label showing a state of peeling off the adhesive coating Perspective,

3 is a cross-sectional view taken along line AA ′ of FIG. 2;

4 is an explanatory diagram showing a bonding of an adhesive sheet on which an antenna is formed according to another embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along the line BB ′ of FIG. 4;

6 is a cross-sectional view when the antenna formed by depositing a conductive ink which is another embodiment of the present invention;

7 is a perspective view showing a conventional antenna coil having a conductor spirally wound on a magnetic core member;

Fig. 8 is a perspective view showing a conventional antenna coil composed of swirled swirl portions.

<< Explanation of symbols for main part of drawing >>

1: base plate 2: main body

6: member 7: conductor

10: radio frequency identification label 20: RFID chip

21: chip 22: substrate

30, 30 ': antenna 31: chip seating groove

40: spacer 50: sheath

60: adhesive coating 61: adhesive

70: adhesive sheet 71: adhesive surface

72: adhesive protective sheet 80: deposited layer

The present invention relates to a radio frequency identification label having a printed antenna, and more particularly, by forming, printing, spraying, and painting the antennas provided at both ends of an RFID chip with conductive ink, so that the formation of the antenna is very easy and the production cost is increased. The present invention relates to a radio frequency identification label which is inexpensive and prevents the reception rate of the radio frequency identification label from falling.

Remotely powered electronic devices and related systems are known. Such remotely powered communication devices are generally known as 'RFID' tags. Previous RFID tags and systems primarily use electromagnetic coupling to remotely power remote devices and combine the remote devices with exciter and receiver systems. The exciter system generates an electromagnetic excitation signal used to power up the device and causes the device to transmit a signal containing the stored information, and the receiver receives the signal generated by the remote device.

The problem with using electromagnetic coupling between the remote device and the exciter or between the remote device and the receiver is the complexity involved in the manufacture of the remote device using the coil antenna. The spiral layout of a conventional coil antenna is difficult to produce and increases the cost and size of the remote device. Coil antennas require stringent tolerances of effective performance. In addition, conventional coil antennas have undesirable thermal compression characteristics that particularly affect the remote device or the ability to create flat tags containing coils.

Radio frequency identification tags and related systems have many uses. For example, radio frequency identification tags are often used for identification of people in automated gate surveillance applications that protect secured buildings or areas. Such tags often take the form of access control cards. The information stored in the radio frequency identification tag identifies a person attempting to access a secured building or area. Old automated gate monitoring applications require a person accessing the building to insert or hit an identification tag through or through a reader from which the system reads information from the identification tag. The new radio frequency identification tag system allows radio frequency identification tags to be read over short distances using radio frequency data transmission technology, eliminating the need to insert or hit an identification tag with or through a reader. More typically, a user simply holds or places a radio frequency identification tag near a base station that is coupled to a security system that secures a building or area. The base station transmits an excitation signal to a radio frequency identification tag that supplies power to a circuit included on the radio frequency identification tag. The circuitry, in response to the excitation signal, communicates information stored from the radio frequency tag to the base station, which base station receives and decodes the information. The information read is used by the security system to determine whether access is appropriate. In addition, the radio frequency identification tag may be recorded remotely by an excitation signal suitably modulated in a predetermined manner.

In addition to typical applications for human access control, RFID tags can be used for electronic animal identification, baggage tracking, mail tracking, inventory management applications, asset identification and other applications related to tracking and identifying objects. Such an application is concerned with transferring stored information from a tag to an exciter / reader system adjacent to the tag. Such an application may also be involved in recording information in a tag. RFID tags for such applications need to be durable or disposed of for temporary use. In applications for the identification of people and objects, bar codes are becoming nearly universal. The production of barcodes is very inexpensive. The problem with barcodes and barcode readers, however, is that the barcodes must be correctly aligned with the barcode reader in order to be read. Another problem with barcodes is that they can become unreadable due to damage such as wear and tear, for example, by exposure or use to moisture. RFID tags solve this disadvantage of barcodes.

In addition to the need to transmit stored information via radio frequency transmission, it is often desirable for an RFID tag to have a identifiable indication to a person, including printed information, logos, photographs or other printed or graphical data. In many applications, printed markings must be ordered for single use, requiring the ability to print or otherwise placing the marking directly on the RFID tag. This requires RFID tags to be very thin, very flat and adaptable to be compatible with current printing technologies including die-sublimation printiong, ink jet printing and flexographic printing. . Previous RFID tags incorporating coils are limited in their ability to be flat, thin and adaptable, not to mention the associated costs. This in particular limits the ability to be printed in the area near the coil antenna. Thus, there is a need for a thin, flat radio frequency identification tag.

In addition, the antenna of the conventional radio frequency identification label is formed by winding a conductive wire coated with an insulating layer in a substantially square swirl shape and adhering to the main board so as to have the lowest thickness, or an aluminum foil laminated on the main board, The thing formed in the vortex shape which remove | eliminated unnecessary part in the conductive layer, such as copper foil, by the etching method or the punching method is used.

However, the antennas formed at both ends of the conventional radio frequency identification label are mostly formed of a conductive metal such as thin thin copper, and the antenna formed by the conventional adhesive, etching, and punching methods as described above. In order to maximize the effect of transmitting and receiving information on the RFID chip, it was very difficult and complicated to form various shapes of the antenna, and the manufacturing process of the tag, especially the antenna manufacturing process, was complicated and high cost. There was a problem with this occurrence.

The present invention is to solve the problems as described above, the antenna can be manufactured in a thin plate as thin as possible, and to configure the various shapes of the antenna is very easy to configure the antenna so that the reception rate of the radio frequency identification mark does not fall The purpose of the present invention is to provide a radio frequency identification label that can be manufactured in various shapes and the minimum thickness required, and to reduce the manufacturing cost and the manufacturing process very easily.

In order to achieve the above object, the radio frequency identification label of the present invention is formed by attaching to the substrate is bent twice and provided with an RFID chip containing information of the object to be managed to communicate with the terminal; An antenna formed on the substrate by printing with conductive ink; A spacer configured to have electrical insulation between the antennas so that the reception rate of the radio frequency identification label does not fall; A sheath consisting of an insulator formed to avoid electrical connection of the antenna to an article to be managed and to increase moisture resistance and durability; An adhesive coating which forms an adhesive layer on one surface of the coating and protects the outside of the adhesive layer by blocking the outside from the outside; wherein the antennas are coupled to the upper and lower surfaces of the spacer in parallel, and the RFID chip is It is coupled to the side of the spacer, formed by enclosing the whole is covered with the radio frequency identification label that transmits its own information to the reader by emitting the active signal through the antenna so that the reader can recognize the information of the RFID chip To provide.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a radio frequency identification label according to the present invention, Figure 2 is a perspective view of a radio frequency identification label according to the present invention, Figure 2a is a perspective view of a radio frequency identification label attached to the adhesive coating, 2b is a perspective view of a radio frequency identification label showing a state of peeling off the adhesive coating, Figure 3 is a cross-sectional view taken along the line A-A 'of Figure 2, Figure 4 is an adhesive sheet formed with an antenna of another embodiment of the present invention 5 is a cross-sectional view taken along line BB ′ of FIG. 4, and FIG. 6 is a cross-sectional view of the antenna formed by depositing a conductive ink, which is another embodiment of the present invention. It is a perspective view which shows the conventional antenna coil which has the conductor wound spirally on the magnetic core member, and FIG. 8 is a perspective view which shows the conventional antenna coil which consists of a swirling vortex part.

An RFID chip 20 attached to the substrate 22 which is bent and provided twice and containing information of a managed object communicating with the terminal; An antenna (30) (30 ') formed by printing with conductive ink on the substrate (22); A spacer 40 configured to have electrical insulation between the antennas 30 and 30 'so that the reception rate of the radio frequency identification label does not fall; A sheath 50 composed of an insulator formed to avoid electrical connection of the antenna 30, 30 'with the article to be managed and to increase moisture resistance and durability; An adhesive coating (60) formed on one surface of the coating (50) and shielding the outside of the adhesive layer (61) from the outside to protect the outer surface of the spacer (50). The antennas 30 and 30 'are coupled in parallel to each other, the RFID chip 20 is coupled to the side surface of the spacer 40, and is entirely surrounded by the coating 50 to form the antenna ( It is characterized in that the reader can recognize the information of the RFID chip 20 by transmitting its information to the reader by emitting an activation signal through 30) (30 ').

In addition, the antenna 30, 30 'of the radio frequency identification label of the present invention is characterized in that formed by spraying the conductive ink on the substrate 22 by spraying.

In addition, the antenna 30, 30 'of the radio frequency identification label of the present invention is characterized in that formed by painting a conductive ink on the substrate (22).

The RFID chip 20 stores various kinds of information on the object to be managed and communicates with the terminal (reader) to provide the information. The RFID chip 20 is formed by attaching a chip 21 containing information of an article to be managed to a substrate 22. The substrate 22 is provided in a shape bent twice.

The antennas 30 and 30 'are made of thin sheets of various shapes to minimize the thickness, and transmit their information to the reader by radiating an active signal through the antennas 30 and 30'. To recognize the information of the RFID chip 20. The shape of the antennas 30 and 30 'may be configured in various shapes, such as square, as needed.

The antennas 30 and 30 'formed on the substrate 22 are formed by a printing method, and the printing material may include conductive ink. That is, the conductive ink is the ink in which the conductive film is dispersed in the vehicle, and the cured film after printing shows the conductivity, and the metal (silver, gold, platinum, filadium, copper and nickel), metal oxide (ruthenium oxide), and amorphous carbon Its main components are powder, graphite, carbon fiber and the like, and these conductive inks are widely known. In addition, the antenna 30, 30 'is a material of the substrate 22 used for forming by the printing method, the acrylonitrile butadiene styrene (ABS), polypropylene (PE), polyester ( PET), polypropylene (PP), paper (PAPER), vinyl chloride (PVC), nylon, polystyrene (PS).

In addition, the conductive ink refers to an ink in which a conductive filler is dispersed in a vehicle, and the cured film after printing exhibits conductivity. The conductive ink is classified into high temperature baking type (thick film paste) and low temperature curing drying type (resin type) according to the curing conditions used. The high temperature firing type is used for mounting of hybrid ICs and semiconductor ICs and thick film materials such as various capacitors and electrodes. The low temperature hardening drying type is widely used by utilizing conductivity and adhesiveness in materials that are poor in heat resistance such as printed circuits or plastics in organic printed circuit boards, and materials that cannot be soldered such as carbon, ferrite and any kind of metal. . Conductive paints, on the other hand, are being used for electromagnetic shields, which have come into the spotlight due to the appearance of electromagnetic pollution generated from high-density, high-power machines such as TVs, radios, personal computers and video games. And although there is no clear distinction between conductive ink and paint, ink is mainly used for screen printing.

In order to prevent the antennas 30 and 30 'from being electrically connected to the object to be managed, the spacer 40 is spaced apart from the object to be managed so that the antennas 30 and 30' fit together. It is provided so as not to touch.

Moreover, it is preferable that the thickness of the said spacer is 3-10 mm. When the size of the spacer 40 becomes thicker, the thickness of the radio frequency identification label 10 becomes thicker. Therefore, when the radio frequency identification label 10 is attached to the object to be managed, when carrying or moving the object to be managed, or There is a problem that the radio frequency identification label 10 easily falls from the object to be managed when the object is moved. In addition, the spacer 40 is preferably made of a material such as ceramic, sponge, Teflon.

Ceramics are made of non-metallic inorganic solid materials made by heat treatment at high temperatures and have excellent fire resistance.

Sponge is a sponge made of natural rubber or synthetic resin, and refers to a porous material on the sponge which is elastic. Representative polymers are polyurethanes and are manufactured as flexible urethane foams (flexible foamed polyurethanes). Foaming is often made with carbon dioxide produced during polyurethane production, but foaming agents such as flangas are also used in combination. There are also viscose sponges made of viscose rayon and spongy rubber made by foaming rubber with foaming agents.

 Teflon (polytetrafluoroethylene; PTFE) is a crystalline resin that is heat resistant to long-term use at 260 ° C and has unique chemical resistance, electrical insulation, high frequency characteristics, non-adhesiveness, low friction coefficient, and flame resistance. PTFE is a crystalline polymer with a melting point of 327 ° C. Its continuous use temperature is 260 ° C and can be used stably from low temperature (-268 ° C) to high temperature. Its chemical resistance is the best among organic materials. It is not invaded by acids, alkalis and various solvents at all, and it is invaded only under severe conditions by special chemicals such as fluorine gas, molten alkali metal and trifluorochlorine. have.

The biggest feature of the mechanical properties is that the friction coefficient is small and is reinforced with various fillers and is used for bearings of oil-free sliding materials. In addition, its non-adhesiveness is also great, making it ideal for coating frying pans and steel pipes.

The electrical properties, especially the dielectric properties, are the best, and wide frequencies are stable over the temperature range and exhibit low permittivity and dielectric loss tangent. Corona resistance is inferior, but other insulation characteristics are also excellent, and it is used as a part of communication computer electronic device as an electric / electronic component.

The sheath 50 is composed of an insulator formed to prevent the antennas 30 and 30 'from being electrically connected to the object to be managed and to increase moisture resistance and durability. In the case where the antenna is made of aluminum foil, copper foil, or the like, in order to avoid the antenna 30, 30 'being electrically connected to the conductive member, it is necessary to fix the insulating member on the surface of the conductive member with an insulating film therebetween. to be.

The adhesive coating 60 is configured such that the coating 50 is easily adhered to the article to be managed. The adhesive layer 61 is formed on one surface of the coating 50 and covered with the adhesive coating 60 to block and protect the adhesive layer 61 from the outside, and the adhesive coating 60 is peeled off during use and managed. It can be attached to an article and can be used easily.

In addition, the antenna 30, 30 ′ of the radio frequency identification label of the present invention is formed by spraying a conductive ink onto the substrate 22 with a spray. When spraying with a spray to form an antenna on the substrate 22, the frame of the antenna shape required for the substrate 22 is placed, and the conductive ink is sprayed onto the frame to complete the process. Various shapes of frames can be created to determine the shape of the antenna.

In addition, the antenna 30, 30 'of the radio frequency identification label of the present invention is formed by painting a conductive ink on the substrate (22). When the antenna is formed by painting, the frame of the antenna shape required for the substrate 22 is placed, and the ink is completed by applying conductive ink to the frame.

In addition, the antenna 30, 30 ′ of the radio frequency identification label of the present invention forms a conductive ink on the adhesive sheet 70 by printing, painting, and spraying, and forms an adhesive surface 71 on the outside thereof to form a substrate ( 22) is characterized in that formed by adhering the adhesive sheet (70).

As shown in FIG. 5, the adhesive sheet 70 is formed by printing, painting, and spraying the antennas 30 and 30 'on one side of the adhesive sheet 70, and the antenna sheets 30 and 30' are formed as described above. An adhesive is applied to the side of 70 and the outer surface of the antennas 30 and 30 'to form an adhesive surface. The outer side of the adhesive surface 71 as described above is provided with an adhesive protective sheet 72 to prevent the adhesive surface 71 is exposed to the outside. The antennas 30 and 30 'configured as described above are completed by removing the adhesive protective sheet 72 from the adhesive surface 71 and adhering the adhesive surface 71 to the substrate 22 of the present invention.

In addition, the antenna 30, 30 'of the radio frequency identification label of the present invention is characterized in that the deposition layer 80 is formed by depositing the substrate 22 in a conductive ink. As shown in FIG. 6, the antennas 30 and 30 ′ are formed by depositing the substrate 22 on conductive ink to form an deposition layer 80. The substrate 22 is formed by immersing it in a liquid conductive ink and drying it. The antennas 30 and 30 'formed by depositing the conductive ink as described above may be formed of thin thin plates having various shapes to minimize thickness, and may emit active signals through the antennas 30 and 30'. The reader transmits his information to the reader so that the reader can recognize the information of the RFID chip 20. The shape of the antennas 30 and 30 'may be configured in various shapes, such as square, as needed. When the substrate 22 is deposited on the conductive ink, one side or both sides are deposited to form the antennas 30 and 30 '.

Looking at the prior art shown in Figs. 7 and 8, a conventional antenna coil used in the identification tag, formed by winding a wire covered with an insulating layer in a substantially square swirl shape and attaching it to the base plate, Alternatively, as shown in FIG. 8, the conductive layer such as aluminum foil or copper foil laminated on the base plate 1 is removed by an etching method or a punching method to form a substantially square spiral coil body 2. It is known. However, in the antenna coil shown in FIG. 8, magnetic flux is generated in a direction penetrating up and down the base plate 1 as indicated by the arrows in the figure. It penetrates the base plate 1 and penetrates the metal article again. For this reason, the eddy current generate | occur | produces in a metal part by the penetrating magnetic flux, and the eddy current affects, and the antenna coil did not operate normally. In addition, even if operated, there is a problem that the loss is increased, the working distance of the antenna coil is significantly shortened. In order to solve this point, as shown in FIG. 7, an antenna coil is known which has a magnetic core member 6 formed in a plate shape, a cylindrical shape, or the like, and a conductor 7 spirally wound on the magnetic core member 6. In the antenna coil shown in Fig. 7, magnetic flux is generated in the axial direction of the magnetic core member 6 as indicated by the arrow in the figure. There is no penetration, and it is expected that the antenna coil will work normally.

However, since the antenna coil shown in FIG. 7 is produced by winding the conductor 7 on the outer circumferential surface of the magnetic core member 6, there is a problem that the winding work is relatively complicated and the productivity is inferior. In addition, since the conductor 7 is wound on the outer circumferential surface of the magnetic core member 6, the whole antenna coil becomes relatively thick, and when the antenna coil is attached to the surface of the article, there is a problem that the antenna coil protrudes relatively large from the article.

The radio frequency identification label according to the present invention configured as described above is coupled to the upper and lower surfaces of the spacer 40 in parallel with the antennas 30 and 30 ', and the RFID chip 20 is connected to the spacer ( One side of the substrate 22 of the RFID chip 20 is coupled to one end of the antenna 30 and the other side is coupled to one end of the antenna 30 'such that the RFID chip 20 is coupled to the side of the RFID chip 20. 20 is coupled to the side of the spacer 40, the entirety is formed surrounded by the sheath 50 to transmit its information to the reader by emitting an activation signal through the antenna 30, 30 ' The reader can recognize the information of the RFID chip 20.

The radio frequency identification cover configured as described above is preferably about 8 to 12 cm in length and about 1 to 5 cm in length, and the thickness of the antennas 30 and 30 'is about 0.05 to 1 cm. Is preferred.

As described above, the radio frequency identification label according to the present invention is formed by painting, spraying, or printing the antennas provided at both ends of the RFID chip with conductive ink, so that the antennas can be formed in various forms, and the thickness thereof is maximized. It can be manufactured in thin sheet, and the manufacturing process is simple and the production cost is low, but there is an effect that the reception rate of the radio frequency identification label does not fall.

Claims (5)

An RFID chip 20 attached to the substrate 22 which is bent and provided twice and containing information of a managed object communicating with the terminal; An antenna (30) (30 ') formed by printing with conductive ink on the substrate (22); A spacer 40 configured to have electrical insulation between the antennas 30 and 30 'so that the reception rate of the radio frequency identification label does not fall; A sheath 50 composed of an insulator formed to avoid electrical connection of the antenna 30, 30 'with the article to be managed and to increase moisture resistance and durability; An adhesive layer 60 which forms an adhesive layer 61 on one surface of the coating 50 and blocks and protects the outside of the adhesive layer 61 from the outside; and consists of upper and lower surfaces of the spacer 40. The antennas 30 and 30 'are coupled in parallel to each other, the RFID chip 20 is coupled to the side surface of the spacer 40, and is entirely surrounded by the coating 50 to form the antenna ( 30) The radio frequency identification label, which transmits its information to the reader by emitting an active signal through the 30 'so that the reader can recognize the information of the RFID chip 20. The radio frequency identification label according to claim 1, wherein the antenna (30) (30 ') is formed by spraying a conductive ink onto a substrate (22) with a spray. 2. The radio frequency identification label according to claim 1, wherein the antenna (30) (30 ') is formed by painting a conductive ink on a substrate (22). The method of claim 1, wherein the antennas 30 and 30 'are formed on the adhesive sheet 70 by printing, painting, and spraying conductive ink, and the adhesive surface 71 is formed on the outside of the substrate 22 to form a conductive ink. Radio frequency identification label, characterized in that formed by adhering the adhesive sheet 70 is provided with the antenna (30, 30 '). The radio frequency identification label according to claim 1, wherein the antenna (30) (30 ') is formed by depositing a substrate (22) on a conductive ink to form a deposition layer (80).

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