KR100735618B1 - Antenna for radio frequency identification and method of manufacturing the same - Google Patents

Abstract

An RFID(Radio Frequency IDentification) antenna and a manufacturing method thereof are provided to prevent a short of the RFID antenna by printing a conductive ink in a loop pattern on a side plane of a thin film substrate without an electric disconnection. An RFID antenna includes a thin film substrate(10), and an antenna unit(20). The antenna unit(20) of a loop pattern is formed by etching a conductive metal thin film laminated on a side plane of the thin film substrate(10) or printing a conductive ink on the side plane of the thin film substrate(10). The antenna unit(20) has a loop unit(21) of a circular shape, a first terminal unit(22), and a second terminal unit(22). The first terminal unit(22) is extended to the outside of a closed circle of the loop unit(21) not to intersect the loop unit(21). The second terminal unit(23) is extended to the inside of the closed circle of the loop unit(21) not to intersect the loop unit(21). A partial circumference of the second terminal(23) is incised. An incision unit is folded toward the other plane of the thin film substrate(10) on which the conductive metal thin film or the conductive ink does not exist. The second terminal unit(23) is extended to the outside of the closed circle of the loop unit(21) when the second terminal unit(23) is not short with the loop unit(21).

Description

RFID antenna and its manufacturing method {Antenna for Radio Frequency Identification and Method of Manufacturing the Same}

1 is a front and back schematic view of an exemplary RFID antenna in accordance with the present invention;

2 is an exemplary manufacturing process diagram of an exemplary RFID antenna according to the present invention;

3 is a front and back schematic view of a conventional exemplary RFID antenna applied to a cellular phone battery;

4 is a manufacturing process diagram of the RFID antenna of FIG.

<Explanation of symbols for the main parts of the drawings>

1: RFID antenna of the present invention 2: conductive metal foil or conductive ink

10: thin film substrate 11: incision

11a: protrusion 12: incision

20: antenna portion 21: loop portion

21a: closed ring 22: first terminal portion

22a, 23a: terminal 23: second terminal portion

30: cover layer

(Technology)

The present invention relates to a radio frequency identification (RFID) antenna and a method for manufacturing the same, and more particularly, an RFID antenna applied to an RFID system installed in a limited design space such as a mobile communication terminal. The present invention relates to an RFID antenna and a method of manufacturing the same, which can significantly reduce manufacturing costs.

(Background)

As is widely known, smart cards equipped with electronic chips equipped with storage, computing and security functions are used to record or identify information in almost all fields of the information and communication society such as finance, communication, education, administration, and transportation. It is widely used as a payment method such as electronic money, credit card or electronic bank account.

Smart cards are classified into various types according to their classification criteria, but may be classified into contact smart cards, contactless smart cards, and combined smart cards, depending on how the data is read.

The contact smart card refers to a form in which the electronic chip is activated by contacting the contact point of the electronic chip with the contact point of the interface device. In the contactless smart card, the operation element and the memory element required for the information processing function are the same as the contact type. It is a form of power supply through the antenna connected to the electronic chip and electromagnetic induction is used for communication with the interface device.Combined smart card is a smart card that supports both contact and non-contact functions. It is a smart card configured to share parts where contact / contactlessness can be shared in one electronic chip.

Traditionally, smart cards were generally embedded in plastic cards such as credit cards and transportation cards. However, as smart card applications are expanded and various mobile communication terminals represented by mobile phones are becoming essential items, smart cards are made of plastic. It has developed into a form that is embedded in a mobile communication terminal rather than a card form.

As a representative example of applying a smart card to a mobile communication terminal, a mobile phone can be installed through a wireless communication with a card reader (for example, a frequency of 13.56 MHz) by embedding a contactless smart card (or a combined card such as a combination card) in the mobile phone. It is designed to be used for various purposes such as payment of prepaid transportation fee, credit settlement, electronic bank account, loyalty management, and identity verification.

In addition to mounting a smart card (contactless smart card or combination card) with a non-contact function in a mobile communication terminal, it is also equipped with a function as an RFID reader that can read information recorded on an RFID tag, and moves to read an RFID tag. A technology that can utilize a communication terminal has also been proposed, and a typical example in which an RFID reader is applied is an external RFID tag as well as a function of an RFID tag mounted on a mobile communication terminal to read information stored through wireless communication with an external RFID reader. A standard NFC (Near Field Communication) technology has also been proposed, which also functions as an RFID reader capable of reading information of an external RFID tag through wireless communication with the wireless network.

As the RFID system is integrated into the mobile communication terminal, the RFID mobile communication terminal needs to have an RFID system in addition to its own circuit. In general, in such an RFID mobile communication terminal, an electronic chip is installed in the main body of the mobile communication terminal and an antenna is provided. Is installed in the battery detachably mounted to the mobile communication terminal body.

In the case of a normal traffic card (or credit card) in which an RFID system is mounted on a plastic card, there are no elements in the card that prevent the generation of the induced electromotive force of the antenna. It was relatively easy to design an RFID antenna because it was possible to fabricate an RFID antenna in a loop pattern so as to have a loop pattern. (RFID antenna is also called a loop antenna because the antenna is wound around several turns in a loop pattern to show the desired antenna characteristics.)

However, in arranging an RFID antenna in a mobile communication terminal such as a cellular phone, it is necessary to minimize the influence of the electromagnetic shielding device applied to the mobile communication terminal on wireless communication of the RFID antenna in order to block the risk of electromagnetic waves. Due to the compact design space, which is one of the trends of terminals, the optimal position of the RFID antenna is a battery.

In addition, even when the RFID antenna is mounted on the battery of the mobile communication terminal, there is not enough space to place the antenna on the battery. Therefore, when designing the antenna by directly wiring copper wires in a loop form as in a traffic card or credit card, Since there is a problem that increases the volume, RFID antennas used in actual mobile communication terminals etch copper foil (thin copper plate) laminated on the substrate in a loop pattern to reduce the occupied volume and increase the reliability of the product. Is designed in such a way.

FIG. 3 is a schematic view of the surface A and back B of a conventional exemplary RFID antenna applied to a cellular phone battery, and FIG. 4 is a manufacturing process diagram of the RFID antenna of FIG.

As illustrated, the conventional RFID antenna 100 is a method of etching a copper foil 101 (copper film: about 35 μm thick) laminated on a thin film substrate 110 (about 25 μm thick) made of polyimide or the like. The antenna unit 120 is designed, but an annular loop portion 121 and a first terminal portion 122 are formed on one side of the thin film substrate 110, and the second terminal portion 123 is formed on the other side of the thin film substrate 110. On the other hand, the via hole 111 is drilled in the thin film substrate 110 and copper is plated in the via hole 111 to electrically connect one end of the roof portion 121 and one end of the second terminal portion 123. It is a structure.

A method of manufacturing a conventional RFID antenna 100 will be described with reference to FIG.

As shown, the conventional RFID antenna 100, with respect to the polyimide thin film substrate 110, the copper foil 101 is laminated and coated on the entire surface of the front and rear surfaces (see A of FIG. 4), the loop portion of FIG. A process of drilling the via hole 111 at a position corresponding to the connection point of the 121 and the second terminal portion 123 (see B of FIG. 4), and the thin film substrate 110 by copper plating the via hole 111. The process of electrically connecting the loop part 121 and the second terminal part 123 electrically disconnected from each other on the front and back surfaces of the c) (see FIG. 4C), and the thin film to conform to the pattern of the entire antenna part 120. The copper foil 101 on the surface and the back surface of the substrate 110 is exposed and etched to form a loop portion 121 and a first terminal portion 122 on the surface of the thin film substrate 110, and on the back surface of the thin film substrate 110. A process of forming the second terminal portion 123, respectively (D in FIG. 4), and the front and rear surfaces of the thin film substrate 110 on which the antenna portion 120 is formed are covered with polyimide or the like. After forming the cover layer 130 (eg, 12.5 μm), the terminals 122a and 123a are formed in the first terminal portion 122 and the second terminal portion 123, and unnecessary portions around the antenna 100 thus formed. It is manufactured by the process of pressing and removing (E of FIG. 4).

In general, the conventional RFID antenna 100 as described above, after forming a plurality of antennas simultaneously on a thin film substrate 110 of a predetermined size to design a plurality of RFID antennas at the last to fit the angle of rotation of the individual antenna unit 120 Press cutting to fabricate multiple RFID antennas at once.

Actually, the conventional manufacturing process of the RFID antenna includes some additional processes, but the above manufacturing process is outlined centering on the processes in contrast to the features of the RFID antenna according to the present invention, and the processes not directly related to the present invention are omitted. Will be described.

In the manufacture of a conventional RFID antenna, a material (double-sided copper foil material) in which copper foils were laminated on both sides of the polyimide thin film substrate 110 was inevitably used. In the case of using a single-sided copper foil material, when the second terminal portion 123 is drawn out from the inside of the roof portion 121 to the outside, the loop portion 121 and the second terminal portion 123 intersect with each other, and thus a short is generated. will be.

As a result, the conventional RFID antenna is a double-sided copper foil material in order to avoid the short circuit occurring in the unavoidable cross wiring of the second terminal portion 123 and the roof portion 121 in the design of the loop antenna RFID antenna. Therefore, it was not possible to avoid the complicated process of forming a via hole and plating the same, and in order to form the antenna unit 120 having the loop pattern, an expensive material in which copper foil was laminated on both sides of the thin film substrate was not used. In addition, since most of the copper foils stacked on both sides were discarded by etching, it was not only difficult to reduce the cost of the RFID antenna, but also caused a waste of resources, environmental pollution, and increased wastewater treatment costs.

An object of the present invention is to solve the problems related to the conventional RFID antenna of the loop pattern applied to the limited conditions, such as the mobile communication terminal as described above, the manufacturing process is simple and the associated cost can be saved, resource consumption And to provide a new structure of the RFID antenna and its manufacturing method that can minimize the environmental pollution pollution.

SUMMARY OF THE INVENTION An object of the present invention relates to an RFID antenna in which a metal foil (for example, copper foil) laminated on a thin film substrate is etched to form a loop pattern. By providing an RFID antenna and a method of manufacturing the same, a loop pattern can be formed without a short process without a complicated process, thereby reducing the manufacturing cost of the RFID antenna and minimizing resource waste and environmental pollution.

In addition, an object of the present invention, in connection with the RFID antenna of the method of printing a conductive ink on a thin film substrate to form a loop pattern, by allowing the conductive ink to be printed in a loop pattern on one side of the thin film substrate without electrical disconnection, This is to solve the short problem related to the RFID antenna of the loop pattern.

According to the present invention, an RFID antenna and a method of manufacturing the same are provided.

The RFID antenna according to the present invention includes a thin film substrate and an antenna unit having a continuous loop pattern without disconnection formed by etching conductive metal foil stacked on one side of the thin film substrate or by printing conductive ink on one side of the thin film substrate. do.

The antenna portion may include an annular loop portion, a first terminal portion extended out of the closed ring portion of the loop portion so as not to intersect the loop portion, and a first extension portion extending into the closed ring portion of the loop portion so as not to cross the loop portion. It includes two terminal parts.

The thin film substrate may be cut around a portion of the second terminal portion such that the cutout portion is folded toward the other side of the thin film substrate on which the conductive metal foil or the conductive ink does not exist, so that the second terminal portion is connected to the roof portion. It extends outside the closed ring of the said loop part in a state without a short.

Method of manufacturing an RFID antenna according to the present invention, by etching the conductive metal foil of the thin film substrate on which the conductive metal foil is laminated on one side or by printing a conductive ink on one side of the thin film substrate, the annular loop portion and the loop portion An antenna portion of a continuous loop pattern without disconnection, including a first terminal portion extending out of the closed ring of the loop portion so as not to intersect and a second terminal portion extending into the closed ring of the loop portion so as not to intersect the loop portion. Forming step; The thin film substrate is cut along a portion of the second terminal portion, and the cutout portion is folded toward the other side of the thin film substrate on which the conductive metal foil or the conductive ink is not present so that the second terminal portion is not shorted with the loop portion. Causing the loop portion to extend out of the closed ring; And covering cover layers on both sides of the thin film substrate on which the antenna unit is formed. It includes.

Preferably, the RFID antenna manufacturing method of the present invention, in the process of forming the incision forming a projection on the incision and the thin film substrate is formed in the incision line in the position where the projection is fitted in the folded state of the incision And fixing the incision to the other side of the thin film substrate by inserting the protrusion into the incision line when folding the incision.

Hereinafter, an RFID antenna and a manufacturing method thereof according to the present invention will be described in detail with reference to the accompanying drawings. The following embodiments merely illustrate the RFID antenna and the method of manufacturing the same according to the present invention, and are not intended to limit the scope of the present invention.

1 is a schematic view of the surface (A) and back (B) of an exemplary RFID antenna according to the present invention, and FIG. 2 is an exemplary manufacturing process diagram of an exemplary RFID antenna according to the present invention.

The RFID antenna 1 according to the present invention is mounted on a battery of a mobile communication terminal such as, for example, a mobile phone, and is electrically connected to an electronic chip installed in a mobile communication terminal base. It is a loop pattern RFID antenna that realizes predetermined contactless functions (e.g. payment of prepaid and post-paid transportation charges, credit settlement, electronic bankbook, royalty management, identification, etc.) mounted on the electronic chip through communication.

The RFID antenna 1 according to the present invention has a basic structure in which an antenna unit 20 having a loop pattern is designed on a thin film substrate 10 (for example, a thickness of about 25 μm) made of polyimide or the like like a conventional RFID antenna. It is.

According to the feature of the RFID antenna 1 of the present invention, a conductive metal foil (for example, a thickness of about 35 μm) represented by copper foil is laminated on only one side (surface in A of FIG. 1) on the thin film substrate 10. The conductive metal foil 2 is etched to form the antenna portion 20 in a loop pattern.

According to the feature of the RRID antenna 1 of the present invention, the antenna portion 20 does not intersect the loop portion 21 from one end of the loop portion 21 and the loop portion 21 wound many times. The first terminal portion 22 extended out of the closed ring 21a of the loop portion 21 and the closed ring of the loop portion 21 so as not to cross the loop portion 21 from the other end of the loop portion 21. 21a) and a second terminal portion 23 extending therein. In the conventional RFID antenna, the second terminal portion is disconnected from the loop portion and the first terminal portion, and the second terminal portion is electrically connected to the loop portion through the via hole. In the RFID antenna 1 of the present invention, the entire antenna portion 20 including the loop portion 21, the first terminal portion 22, and the second terminal portion 23 is electrically connected without disconnection. .

According to another feature of the RFID antenna 1 of the present invention, the thin film substrate 10 is cut around a part of the second terminal portion 23 so that the cutout portion 11 is formed. The cutout is formed around the second terminal portion 23 at a position such that the conductive metal foil 2 of the antenna portion 20 is not disconnected. In the illustrated embodiment, the second terminal portion 23 is the loop portion 21. It shows an example in which the U-shaped section is cut on three sides except for the side connected with.

The cutout 11 is folded toward the other side (the surface in B of FIG. 1) of the thin film substrate 10 on which the conductive metal foil 2 is not laminated, whereby the second terminal portion 23 is the loop portion 21. It extends from the inside of the closed ring 21a of the loop part 21 to the outside in the absence of a short circuit. In the illustrated embodiment, according to the folding of the cutout part 11, the second terminal part 23 may be spaced apart from the first terminal part 22 in parallel with the thin film substrate 10 overlapped in two layers. Arranged (see D in FIG. 2).

According to the characteristic structure of the RFID antenna of the present invention as described above, since the conductive metal foil 2 forming the antenna unit 20 is laminated on only one side of the thin film substrate 10 and is connected without disconnection, as in the prior art. There is no need to use a material in which the conductive metal foil 2 is laminated on both sides of the thin film substrate 10, and there is no need to apply a structure such as a plated via hole for connection of the disconnected antenna unit.

Hereinafter, a method of manufacturing an RFID antenna according to the present invention will be described in detail with reference to FIG. 2.

In a first step of the method of manufacturing the RFID antenna 1 according to the present invention, the conductive metal foil 2 of the thin film substrate 10 (see A in FIG. 2) having the conductive metal foil 2 laminated on only one side thereof is etched. This is a step of forming the antenna portion 20 of the loop pattern (see FIG. 1B). As described above, the antenna portion 20 has an annular loop portion 21 and a first terminal portion 22 extended outside the closed ring 21a of the loop portion 21 so as not to intersect the loop portion 21. And a second terminal portion 23 extending into the closed ring 21a of the loop portion 21 so as not to intersect the loop portion 21, and such an antenna portion 20 is continuously continuous without electrical disconnection. .

The process of forming the antenna portion 20 of the loop pattern by exposing and etching the conductive metal foil 2 laminated on one side of the thin film substrate 10 is manufactured of a flexible printed circuit board (FPCB), which is widely used in the related art. Techniques and the like can be applied and implemented in accordance with the present invention.

In the second step of the method of manufacturing an RFID antenna according to the present invention, the thin film substrate 10 is cut along a portion of the second terminal part 23 (C of FIG. 2), and the cut-out part 11 is formed of a conductive metal foil. (2) is folded to the side not laminated (the other side of a thin film board | substrate), and the 2nd terminal part 23 is external from the inside of the closed ring 21a of the loop part 21, without a short with the loop part 21. It is a process to make it elongate (refer to D of FIG. 2). In FIG. 2C etc., the dotted line of the cutout part 11 shows a fold line.

When the antenna of the loop pattern is formed in the two-dimensional plane, one end of the loop portion 21 (that is, the first terminal portion 22) exists outside the closed ring 21a of the loop portion 21, but the other end (that is, The second terminal portion 23 is forced to be located inside the closed ring 21a, and thus, the process includes closing the second terminal portion 23 inside the closed ring 21a without a short with the loop portion 21. 21a) The technical problem to be drawn out is solved by folding the second terminal portion 23 to the other side of the thin film substrate 10 on which the conductive metal foil 2 is not laminated.

In the illustrated embodiment, all the conductive metal plates 2 except the second terminal portions 23 are etched away in the cutout 11, but some conductive metal plates 2 are etched in parallel with the second terminal portions 23. Without leaving the reinforcing bar (not shown), the reinforcing bar may be brought into contact with the rear surface of the first terminal part 22 to support the first terminal part 22 when the cutout part 11 is folded.

In a third process of the method of manufacturing an RFID antenna according to the present invention, both sides of the thin film substrate 10 on which the antenna unit 20 is formed, for example, cover layers 30 made of a material such as polyimide (for example, each about 12.5 μm) (Thickness) to protect the antenna unit 20 (see FIG. 2E). This process can also be carried out by adapting the generalized coating techniques in the art to this invention.

After the cover layer 30 is formed, the terminals 22a and 23a are formed in the first terminal part 22 and the second terminal part 23 folded, respectively, and cut to fit the outer rim angle of the antenna part 20. Complete the RFID antenna (see F in FIG. 2).

Terminals 22a and 23a are terminals connected to, for example, battery protection circuits when the RFID antenna 1 of the present invention is mounted on a battery of a mobile communication terminal such as a cellular phone, and the battery is mounted on the main body of the mobile communication terminal. The terminals 22a and 23a are electrically connected to an electronic chip located in the main body of the mobile communication terminal. Generally, the terminals 22a and 23a are formed so as to be connectable with other circuits by plating tin copper or gold at the ends of the first terminal portion 22 and the second terminal portion 23.

As described above, the RFID antenna 1 of the present invention simultaneously forms a plurality of antennas on a thin film substrate 10 having a predetermined size, and finally press-cuts and cuts the individual antenna units 20 to simultaneously produce a plurality of RFID antennas. In general, the illustrated embodiment illustrates a process of designing and manufacturing only one RFID antenna.

In the method of manufacturing an RFID antenna according to the present invention, a process of forming a cutout part 11 and folding the cutout part 11 and stacking the cover layer 30 thereon includes a first terminal part when stacking the cover layer 30. It is preferable that the cutout 11 be folded well on the other side of the thin film substrate 10 in a state in which 22) and the second terminal portion 23 are disposed in parallel at an appropriate position.

To this end, as shown in Fig. 2 to 2, in the process of forming the cutout 11, forming a small projection (11a) on both sides of the cutout 11, the cutout 11 is folded In this state, the incision line 12 is formed on the thin film substrate 10 at a position corresponding to the position of the protrusion 11a, and when the incision 11 is folded, the protrusion 11a is attached to the incision line 12. By inserting the cutout 11 may be fixed to the thin film substrate 10 in a folded state. In the accompanying drawings, an example in which the protrusions 11a are formed on both sides of the cutout 11 is illustrated, but the positions thereof may be arranged differently, such as one formed on the top surface of the cutout 11. The projections 11a and the incision 12 are all removed in the subsequent cutting process so that they do not remain in the finally produced RFID antenna 1 of the present invention (see FIG. 2F).

The cutout 11 including the projection 11a shown in FIG. 1 is actually a trace of the cutout 11 that penetrates the thin film substrate 10 after folding the cutout 11, but not the cutout portion. Reference numeral 11 was given. In FIG. 1, the portion indicated by the cutout 11 is in a state in which only the upper and lower protective layers 30 remain while the thin film substrate 10 is removed.

The manufacturing method of the RFID antenna according to the present invention described above mainly describes the characteristic configuration of the present invention. Actually, some other additional processes may be included in the manufacturing process of the RFID antenna to which the present invention is applied. Since it is not directly related to the invention, it is omitted.

The RFID antenna of the loop pattern is not currently applied substantially except the method of etching the conductive metal foil laminated on the thin film substrate described above, but a conductive ink such as silver-nano ink is directly applied to the surface of the thin film substrate in a loop pattern. It can also be formed by a printing method.

The problem that a short does not generate | occur | produce by the intersection of a loop part and a 2nd terminal part when drawing a 2nd terminal part from the inside of the closed ring of the loop part demonstrated with reference to FIG. The same applies to RFID antennas.

Therefore, in the case of printing the loop pattern with conductive ink by the conventional printing method, the entire antenna portion (loop portion, first terminal portion and second terminal portion) cannot be printed continuously without disconnection. As described with reference to this, a complicated process of electrically connecting the loop portion and the second terminal portion without a short after printing the second terminal portion disconnected from the loop portion is required.

The RFID antenna according to the present invention and a method of manufacturing the same can be applied to an RFID antenna of a method of forming a loop pattern by printing a conductive ink on a thin film substrate. Hereinafter, a specific example of an RFID antenna and a method of manufacturing the same according to the present invention to which conductive ink is applied will be described.

The RFID antenna 1 according to the present invention to which the conductive ink is applied, instead of etching the conductive metal foil 2 to form the antenna unit 20, the conductive ink 2 directly on one side of the thin film substrate 20. Except for the configuration of printing the antenna portion 20 of the loop pattern with), since it is substantially the same as the above-described embodiment with reference to FIGS. 1 and 2 applying the conductive gold foil, hereinafter, without additional drawings A brief description will be made and the reference numerals of the conductive inks will be described using the same '2' as the conductive metal foil.

The RFID antenna 1 according to the present invention to which the conductive ink is applied includes a thin film substrate 10 and an antenna having a continuous loop pattern without disconnection formed by printing the conductive ink 2 on one side of the thin film substrate 10. And a part 20.

The antenna portion 20 includes an annular loop portion 21, a first terminal portion 22 extending outside the closed ring 21a of the loop portion 21 so as not to intersect the loop portion 21, and a loop. The second terminal portion 23 extends into the closed ring 21a of the loop portion 21 so as not to intersect the portion 21.

The thin film substrate 10 is cut around a portion of the second terminal portion 23 so that the cutout portion 11 is folded toward the other side of the thin film substrate 10 in which the conductive ink 2 does not exist. The terminal portion 23 extends outside the closed ring 21a of the loop portion 21 in a state where the terminal portion 23 is not shorted with the loop portion 21.

In the method of manufacturing the RFID antenna 1 according to the present invention to which the conductive ink is applied, the conductive ink 2 is printed on one side of the thin film substrate 20 to form an annular loop portion 21 and a loop portion 21. The first terminal portion 22 extended out of the closed ring 21a of the loop portion 21 so as not to intersect with the extension portion, and the inside of the closed ring 21a of the loop portion 21 so as not to intersect the loop portion 21. Forming an antenna portion 20 of a continuous loop pattern without disconnection, including a second terminal portion 23; The thin film substrate 10 is cut along a portion of the second terminal portion 23, and the cutout portion 11 is folded toward the other side of the thin film substrate 10 in which the conductive ink 2 is not present. (23) extending the outside of the closed ring 21a of the loop portion 21 without a short with the loop portion 21; And covering the cover layer 30 on both sides of the thin film substrate 10 on which the antenna unit 20 is formed. It includes.

According to the RFID antenna 1 and the method of manufacturing the same according to the present invention to which the conductive ink is applied, the entire antenna portion 20 is continuously printed with the conductive ink 2 on one side of the thin film substrate 10 without disconnection. Since it is possible to do this, the second terminal part may be disconnected from the loop part and then the complicated process of electrically connecting the loop part and the second terminal part without a short may be eliminated by a separate process.

According to the RFID antenna and a method of manufacturing the same according to the present invention described above, in relation to an RFID antenna which forms a loop pattern by etching a conductive metal foil laminated on a thin film substrate mounted in a limited condition such as a mobile communication terminal, Using a low-cost material in which conductive metal foil is laminated on only one side instead of both sides, the loop pattern can be simply formed without a via hole drilling and plating process, thus significantly reducing the manufacturing cost and reducing resources compared to conventional RFID antennas. It has the effect of minimizing environmental pollution.

According to the RFID antenna according to the present invention and a method for manufacturing the same, in connection with an RFID antenna that forms a loop pattern by printing conductive ink on a thin film substrate, the conductive ink may be printed on one side of the thin film substrate in a loop pattern without electrical disconnection. Therefore, there is an effect that can easily solve the short problem associated with the RFID antenna of the loop pattern.

Claims (3)

Continuous without disconnection formed by etching the thin film substrate 10 and the conductive metal foil 2 stacked on one side of the thin film substrate 10 or by printing the conductive ink 2 on one side of the thin film substrate 10. An antenna unit 20 having a loop pattern; The antenna portion 20 includes an annular loop portion 21 and a first terminal portion 22 extended outside the closed ring 21a of the loop portion 21 so as not to intersect the loop portion 21. And a second terminal portion (23) extending into the closed ring (21a) of the loop portion (21) so as not to intersect the loop portion (21); The thin film substrate 10 is cut around a portion of the second terminal portion 23 so that the cut portion 11 is the thin film substrate 10 in which the conductive metal foil 2 or the conductive ink 2 does not exist. And the second terminal portion (23) extends outside the closed ring (21a) of the loop portion (21) without a short with the loop portion (21). The conductive metal foil 2 of the thin film substrate 10 having the conductive metal foil 2 laminated on one side thereof may be etched or the conductive ink 2 may be printed on one side of the thin film substrate 20 to form an annular loop portion ( 21, the first terminal portion 22 extended out of the closed ring 21a of the loop portion 21 so as not to intersect the loop portion 21, and the loop so as not to cross the loop portion 21. Forming an antenna portion 20 having a continuous loop pattern without disconnection, including a second terminal portion 23 extending into the closed ring 21a of the portion 21; The thin film substrate 10 is cut along a portion of the second terminal portion 23 and the cutout 11 is cut into the thin film substrate 10 in which the conductive metal foil 2 or the conductive ink 2 does not exist. Folding the second terminal portion (23) out of the closed ring (21a) of the loop portion (21) without a short with the loop portion (21) by folding toward the other side of the side; And Coating a cover layer (30) on both surfaces of the thin film substrate (10) on which the antenna unit (20) is formed; RFID antenna manufacturing method comprising a. The method of claim 2, wherein the protrusion 11a is formed in the cutout part 11 in the process of forming the cutout part 11, and the cutout part 11 is folded in the thin film substrate 10. An incision line 12 is formed at a position at which the protrusion 11a is fitted, and when the incision 11 is folded, the protrusion 11a is inserted into the incision line 12 so that the incision 11 Further comprising the step of fixing to the other side of the thin film substrate, RFID antenna manufacturing method.

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