JP2000315908A - Antenna connection body and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antenna connection body at a low cost that simply enhances the sensitivity without increasing the electric resistance of an antenna and is used for a radio frequency identification RF-ID or the like with high performance. SOLUTION: In the antenna connection body and its manufacture, a plurality of antennas 3 each consisting of a conductor layer comprising conductive ink printed on a substrate 2 with a prescribed loop pattern are placed on the substrate 2, a plurality of the antennas 3 are electrically connected in parallel and formed so that directions of the loops of the antennas 3 are the same in the parallel connection state. Or the antennas are provided respectively on the front and rear sides of the substrate, through-holes penetrated through the substrate 2 are provided and the antennas on the front and rear sides may be connected in parallel via the through-holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RF-ID (Radio Frequency) including a non-contact IC tag.
TECHNICAL FIELD The present invention relates to an antenna connector having a plurality of antennas for cy IDentification on a base material and a method for manufacturing the same.

[0002]

Conventionally, a thin communication article such as a non-contact IC tag is provided with a single antenna inside to communicate with the antenna, and the communication distance is determined by the electric resistance of the antenna. The lower the distance, the longer the distance. For this reason, high sensitivity is required for the RF-ID antenna, but there is a limit in achieving both performance and low cost. That is, the conventional RF-ID antenna is formed as only one loop,
Under this situation, as described above, as one method for realizing long-distance communication, the number of loop turns is increased to increase the sensitivity of the antenna. However, the antenna has other electrical characteristics that must be satisfied. Specifically, by increasing the number of turns, the inductance component is secured (the loop length is lengthened). And the high sensitivity is contradictory to the electrical characteristics that must be satisfied. As described above, it is necessary for RF-ID antennas to satisfy contradictory characteristics. Therefore, if an antenna with good performance is sought, the manufacturing cost tends to increase. on the other hand,
There is a demand in the market for disposable use, and a low-cost and high-performance antenna has been demanded. Therefore,
In view of the above circumstances, an object of the present invention is to easily increase sensitivity without increasing the electric resistance of an antenna, and to obtain a high-performance antenna connector used for RF-ID or the like at low cost. With the goal.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems, and a plurality of antennas each having a conductive layer formed in a predetermined loop pattern are provided on a substrate in a state of being connected in parallel. An object of the present invention is to provide an antenna connector characterized in that the above problem is solved. In the present invention, an antenna is formed on the front and back surfaces of the base material, and the antenna on the base material surface and the antenna on the back surface of the base material can be connected in parallel. It is possible to make the loop directions the same, connect the loop start ends of the antennas, and connect the loop ends. Further, another invention is characterized in that a plurality of antennas formed of a conductive layer having a predetermined loop pattern are formed on a base material by printing or etching conductive ink, and the plurality of antennas are connected in parallel. A method for manufacturing a connector, which provides a method for manufacturing the antenna connector and solves the above-mentioned problem. In the present invention, it is possible that the antenna is formed on the front and back of the base material, the antenna on the front surface of the base material and the antenna on the back side of the base material are connected in parallel, and the loop direction of the antenna is changed. In the same manner, it is possible to connect the loop start ends of the antenna and connect the loop end ends.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. In FIG. 1, reference numeral 1 denotes an antenna connector. As shown in FIG. 1D, the antenna connector 1 is a conductive layer formed by printing conductive ink on a base material 2 in a predetermined loop pattern. A plurality of antennas 3 comprising:
Are electrically connected in parallel, and are formed so that the loop directions of the antennas 3 are the same under the parallel connection state. Paper or film can be used as the base material 2, and high quality paper, matte paper, coated paper,
Synthetic paper and other known materials can be used. When the substrate 2 is a film, PET, PE, PP, PP
S, polyimide, or other known thermoplastic or thermosetting films can be used, and the surface may be subjected to physical or chemical treatment. In addition, the connecting line portion 4 connected to each of the antennas 3 is also formed of the same conductive ink as the antenna material. An insulating layer 5 is provided between the antenna 3 and the connecting wire portion 4 to ensure insulation. In the figure, reference numeral 6 denotes an IC chip mounted so as to be connected to the connection line section 4.

FIG. 1 shows an antenna connector 1 in which a plurality of antennas 3 are connected in parallel to one side of a base material 2. Further, as shown in FIG. 2D, antennas 3 may be provided on the front and back of the base material 2 respectively. In this case, the front and back antennas 3 are provided so as to cover the through holes 7 penetrating the base material 2, and the front and back antennas 3 are electrically connected in parallel through the through holes 7, and the connection state , So that the loop directions of both antennas 3 are the same. in this way,
The position where the antenna 3 is arranged is not limited to only one side of the base member 2, but can be provided on both the front and back surfaces of the base member 2. It may be.

A conductive layer constituting a circuit on the base material 2 including each of the antennas 3 can be formed by screen printing. However, the present invention is not limited thereto, and may be formed using a conductive layer formed by an etching method or the like. In the case of printing, a commercially available conductive ink can be used as a material for forming the circuit including the antenna 3, but the present invention is not limited to this. Furthermore, a commercially available resist ink can be used as the insulating material of the insulating layer 5, but the present invention is not limited to this.

Next, a method for manufacturing the antenna connector 1 will be described with reference to an embodiment in which a plurality of antennas 3 are arranged on one surface of a base material and an embodiment in which antennas 3 are arranged on both surfaces of the base material. Single-sided type (FIG. 1) An antenna 3 connected in parallel on a surface 2a of a base material 2 made of paper or film and a connecting line portion 4 (portion not intersecting with the antenna 3) using a 180-mesh emulsion 15 μm thick screen. It is formed by a screen printing method (FIG. 1
(I)). Conductive ink is LS-41 manufactured by Asahi Chemical Laboratory
5C-M was used. The above conductive ink was heated at 150 ° C / 30
After curing under the conditions of the minute, the insulating layer 5 is formed at a predetermined position of the antenna 3 (a region including an intersection with the connecting line portion 4) using a resist ink CR-44B manufactured by Asahi Chemical Laboratory. (FIG. 1 (b)). Apply the above resist ink to 1
After curing under the condition of 50 ° C./10 minutes, a connecting line portion 4 intersecting with the antenna 3 is formed on the insulating layer 5 using the same conductive ink (FIG. 1C). Then, the conductive ink of the connecting line portion 4 was cured under the condition of 150 ° C./30 minutes to obtain the antenna connector 1. The electric resistance of the antenna connector 1 was の of that when the antenna 3 was not connected in parallel because the antenna 3 was connected in parallel. After mounting the IC chip 6, the communication distance was 22 mm. The communication distance when the antennas were not connected in parallel was 18 mm, and the parallel connection improved the communication distance by about 26%.

Double-sided type (FIG. 2) One antenna 3 and a connecting line portion 4 (portion not intersecting with the antenna 3) are formed on a surface 2a of a base material 2 made of paper or film using a 180-mesh emulsion 15 μm thick screen. (FIG. 2A). As the conductive ink, LS-415C-M manufactured by Asahi Chemical Laboratory was used. After curing the conductive ink under the condition of 150 ° C./30 minutes, the same one antenna 3 is
A 0-mesh emulsion is formed by a screen printing method using a screen having a thickness of 15 μm (FIG. 2B). The conductive ink is the same as the surface 2a, LS-415C manufactured by Asahi Chemical Laboratory.
−M is used, and the positions of the antennas 3 on the back surface 2b are aligned with the antennas 3 on the front surface 2a in a state where the directions of the loops on the base material are the same. After the conductive ink on the back surface 2b is cured under the condition of 150 ° C./30 minutes, the loop start ends 3a of the front and back antennas 3 are connected to each other through the through-hole portions 7, and similarly, the loop end portions 3b are connected to each other through the through-hole portions 7. (Fig. 2 (c)). The through-hole 7 is formed by a small hole or a fine slit.
, And a conductive material such as the same material as that of the antenna is provided in this portion. The front and back antennas 3 are formed such that the loop start end 3a and the loop end 3b extend over the through hole 7. Next, the insulating layer 5 was formed at a predetermined position of the antenna 3 on the surface 2a (a region including a portion intersecting with the connection line portion 4) using the resist ink CR-44B manufactured by Asahi Chemical Laboratory. After the resist ink is cured under the condition of 150 ° C./10 minutes, the connecting line portion 4 is formed on the insulating layer 5 using the same conductive ink, and the resist ink is cured under the condition of 150 ° C./30 minutes. Cured (Fig. 2
(D)) Then, the antenna connector 1 was obtained. The electric resistance of the antenna connector 1 was の of that when the antenna 3 was not connected in parallel because the antenna 3 was connected in parallel. After mounting the IC chip 6, the communication distance was 23 mm. Communication distance when antennas are not connected in parallel is 17m
m, about 35% improvement by connecting in parallel.

When a plurality of antennas are connected, if the inner end of the antenna loop is the loop start end and the outer end is the loop end, the loop start end (front) -loop start end (back) and the loop end (front) -When the loop end (back) is connected (the direction of the loop is the same), the communication distance is improved, but the loop start (front)-loop end (back), the loop end (front)-loop start ( When the connection was made in (back) (the direction of the loop was opposite), communication was not possible with both of the antenna forming methods of FIGS.

[0010]

According to the present invention described above, a high-sensitivity antenna connector as a whole can be obtained without increasing the electric resistance of each antenna, and an RF-ID having a high-performance transmitting / receiving section made of a low-cost material. Can be easily realized. The material is also not limited to the base material, and paper or film can be used, and high-performance antenna parts can be formed on electric circuit products using this paper base or film base. It has the effect that it has.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a method for manufacturing an antenna connector according to the present invention.

FIG. 2 is an explanatory view showing another embodiment of the method of manufacturing an antenna connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Antenna connection body 2 ... Base material 2a ... Front surface 2b ... Back surface 3 ... Antenna 4 ... Communication line part 5 ... Insulating layer 6 ... IC chip 7 ... Through hole

Claims (6)

[Claims] 1. An antenna connector, wherein a plurality of antennas each having a conductive layer formed in a predetermined loop pattern are provided on a base member in a state of being connected in parallel. 2. The antenna connector according to claim 1, wherein an antenna is formed on the front and back of the base, and the antenna on the front of the base and the antenna on the back of the base are connected in parallel. 3. The antenna connector according to claim 1, wherein the loop directions of the antennas are the same, the loop start ends of the antennas are connected, and the loop ends are connected. 4. An antenna connector according to claim 1, wherein a plurality of antennas made of a conductive layer having a predetermined loop pattern are formed by printing or etching conductive ink on a base material, and the plurality of antennas are connected in parallel. Production method. 5. The method of manufacturing an antenna connector according to claim 4, wherein the antenna is formed on the front and back surfaces of the base material, and the antenna on the front surface of the base material and the antenna on the back surface of the base material are connected in parallel. 6. The antenna connector according to claim 4, wherein the loop directions of the antennas are the same, the loop start ends of the antennas are connected, and the loop ends are connected.