JP6798930B2 - Discriminator and its manufacturing method - Google Patents

Description

The present invention relates to an discriminator that makes it possible to discriminate identification information using the resonance peak of an antenna.

In recent years, with the development of the information-oriented society, information is recorded on labels and tags attached to products and the like, and the products and the like are managed using these labels and tags. In information management using such labels and tags, non-contact IC labels and non-contact IC labels equipped with IC chips capable of writing and reading information in a non-contact state with respect to the labels and tags are used. Identification bodies using RFID technology such as type IC tags are rapidly becoming widespread due to their excellent convenience.

The discriminator using such RFID technology is not limited to the one on which the IC chip is mounted as described above, but has a plurality of antennas having different resonance peak frequencies and a plurality of antennas without using the IC chip. It is also considered that the ID can be identified by the combination of antennas. For example, the shape of the dielectric element and the capacitor element that make up a plurality of antennas may be different, or the shapes and directions of the plurality of antennas may be different, so that the frequency of the resonance peak may be different for each of the plurality of antennas. Patent Documents 1 and 2 disclose techniques that enable IDs to be expressed in combination. By using this technology, when the number of antennas is N, it is possible to have two pieces of information, "1" and "0", depending on the presence or absence of one antenna, and unless all antennas are present. Therefore, the ID consisting of (2 ^N -1) bits can be expressed discriminatingly.

Special Fair 7-80386 Gazette Japanese Patent Publication No. 2008-503759

In recent years, as described above, management of products and the like using IDs has been performed in various markets, and it is preferable that the number of bits constituting the IDs is large accordingly. As described above, in the case where there are a plurality of antennas having different resonance peak frequencies and the ID can be discriminated by the combination of the antennas, when the number of antennas is N, (2 ^N -1). ) Since the ID consisting of bits is represented, the number of antennas is increased when the number of bits of the ID is increased.

When the number of bits of the ID becomes enormous, production by analog printing or etching, which requires a real plate, is not preferable, and digital printing such as inkjet printing, which does not require a real plate, is preferable, but digital. Since the film thickness formed by printing becomes thin, the reflection intensity of an antenna manufactured by digital printing is weak, and it becomes impossible to detect the resonance peak.

14A and 14B are views showing an example of an ID tag in which an antenna and a ground pattern are arranged so as to face each other. FIG. 14A is a surface view, FIG. 14B is a cross-sectional view taken along the line AA'shown in FIG. Is a back view. FIG. 15 is a diagram showing the frequency characteristics of the ID tag 501 shown in FIG.

In this example, as shown in FIG. 14, the antenna 510 is laminated on one surface of the base base material 520 made of an insulating material, and the outer shape thereof is viewed in a plan view on the other surface of the base base material 520. The ID tag 501 is formed by stacking ground patterns 530 that cover the antenna 510.

In the ID tag 501 shown in FIG. 14, when the antenna 510 and the ground pattern 530 are laminated with a film thickness of 3 μm by analog printing, a resonance peak is observed at a frequency of about 8.5 GHz as shown by a broken line in FIG. Will be done. However, when the antenna 510 and the ground pattern 530 are laminated with a film thickness of 100 nm by digital printing, the resonance peak is not observed as shown by the solid line in FIG.

In this way, resonance peaks are observed when the antenna 510 and ground pattern 530 are laminated by analog printing, but when the same antenna 510 and ground pattern 530 are laminated by digital printing, their films are observed. As the thickness becomes thinner, the resonance peak is not observed, and the ID tag 501 does not function. Therefore, it is conceivable to increase the film thickness of the antenna 510 and the ground pattern 530 by performing digital printing a plurality of times, but in that case, the productivity is lowered and the cost is increased.

The present invention has been made in view of the problems of the prior art as described above, and even if the identification information is composed of multiple bits, the identification information can be discriminated without reducing the productivity. It is an object of the present invention to provide an identification body and a method for producing the same.

In order to achieve the above object, the present invention
It is an discriminator to which identification information that is discriminated by the presence or absence of detection of a resonance peak is given.
With the base base material
An antenna laminated on one surface of the base base material and
It is laminated on the other surface of the base base material, has an outer shape that covers the antenna in a plan view, and is provided in a region facing at least a part of the antenna according to the identification information given to the discriminator. It has a ground pattern including a non-conductive portion on which a conductive layer is laminated, and has a ground pattern.
In the antenna, the resonance peak appears when the conductive layer is laminated on the non-conductive portion.

In the present invention configured as described above, in the configuration in which the antenna is laminated on one surface of the base base material and the ground pattern is laminated on the other surface of the base base material, the ground pattern has an antenna. A non-conductive portion is provided in a region facing at least a part of the antenna, and a resonance peak appears when the conductive layer is laminated on the non-conductive portion of the antenna, and the conductive layer is not laminated on the non-conductive portion. In this case, the resonance peak does not appear, so the antenna and ground pattern are uniformly laminated by thickening the film thickness by analog printing or the like, which is the first coating method, and according to the identification information given to the discriminator. If the conductive layer is laminated only on the non-conductive portion in variable printing such as digital printing, which is the second coating method that does not require an actual plate, the identification information is determined depending on the presence or absence of detection of the resonance peak.

In this way, the antenna and the ground pattern are uniformly thickened and laminated, and the conductive layer is laminated only on the non-conductive portion by variable printing such as digital printing according to the identification information given to the discriminator. By doing so, the resonance peak is generated according to the identification information. Therefore, even if the identification information consists of multiple bits, the identification information can be obtained depending on the presence or absence of detection of the resonance peak without reducing the productivity. It will be determined.

For example, it has a plurality of antennas having different resonance peak frequencies and a plurality of non-conductive portions corresponding thereto, and the conductive layer is at least one of the plurality of non-conductive portions according to the identification information given to the discriminator. If the antennas are laminated, a resonance peak will occur for the antenna in which the conductive layer is laminated on the corresponding non-conductive portion, and for the antenna in which the conductive layer is not laminated on the corresponding non-conductive portion. Does not generate a resonance peak, and depending on whether or not this resonance peak appears, a value for each bit constituting the identification information is set for each of a plurality of antennas, and by combining these values, identification information consisting of multiple bits can be obtained. You will be able to distinguish.

For an antenna as described above, if the Q value is 30 or less in a state where it does not face the ground pattern, a conductive layer is laminated on the non-conductive portion to develop a sharp resonance peak having a Q value of 30 or more. be able to.

As a method for manufacturing such an identifier,
The ground having the antenna laminated on one surface of the base base material and the non-conductive portion on the other surface of the base base material by using the first coating method of applying the conductive material. The process of stacking patterns and
It is conceivable to have a step of laminating the conductive layer on the non-conductive portion according to the identification information given to the identifying body by using a second coating method different from the first coating method.

According to the present invention, the antenna and the ground pattern are uniformly thickened and laminated, and the conductive layer is formed only on the non-conductive portion by variable printing such as digital printing according to the identification information given to the discriminator. By stacking the above, a resonance peak is generated according to the identification information. Therefore, even if the identification information consists of multiple bits, the identification information can be discriminated without reducing the productivity. be able to.

Further, it has a plurality of antennas having different resonance peak frequencies and a plurality of non-conductive portions corresponding thereto, and the conductive layer is at least one of the plurality of non-conductive portions according to the identification information given to the discriminator. It is possible to discriminate the identification information consisting of multiple bits depending on whether or not a resonance peak is generated for each of a plurality of antennas.

Further, when the antenna has a Q value of 30 or less in a state where it does not face the ground pattern, a conductive layer is laminated on the non-conductive portion to develop a sharp resonance peak having a Q value of 30 or more. Can be done.

It is a figure which shows the structure of an example in 1st Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the cross-sectional view of AA' shown in (a). (C) is a figure which shows the structure of the back surface. It is a figure which shows the structure of another example in 1st Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the cross section AA'shown in (a). FIG. 3C is a diagram showing the configuration of the back surface. It is a figure which shows the frequency characteristic of the ID tag shown in FIG. 1 and FIG. It is a figure which shows an example of the application form of the ID tag shown in FIG. 1 and FIG. 2, (a) is the figure which shows the structure of the surface, (b) is the cross-sectional view of AA' shown in (a), ( c) is a figure which shows the structure of the back surface. It is a figure which shows another example of the application form of the ID tag shown in FIG. 1 and FIG. 2, (a) is the figure which shows the structure of the surface, (b) is the sectional view of AA' shown in (a). , (C) is a diagram showing the configuration of the back surface. It is a figure which shows the frequency characteristic of the ID tag shown in FIG. 4 and FIG. It is a figure which shows an example of the ID discrimination system which discriminates the ID given to the ID tag shown in FIG. It is a figure which shows the structure of an example in 2nd Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the cross-sectional view of AA' shown in (a). (C) is a figure which shows the structure of the back surface. It is a figure which shows the structure of another example in 2nd Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the cross section AA'shown in (a). FIG. 3C is a diagram showing the configuration of the back surface. It is a figure which shows the 3rd Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the cross-sectional view of AA' shown in (a), (c) is It is a figure which shows the structure of the back surface. It is a figure which shows the frequency characteristic of the ID tag shown in FIG. It is a figure which shows the structure of an example in 4th Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the sectional view of AA'shown in (a). (C) is a figure which shows the structure of the back surface. It is a figure which shows the structure of another example in 4th Embodiment of the discriminator of this invention, (a) is the figure which shows the structure of the surface, (b) is the cross section AA'shown in (a). FIG. 3C is a diagram showing the configuration of the back surface. It is a figure which shows an example of the ID tag which arranged the antenna and the ground pattern facing each other, (a) is a front view, (b) is a cross-sectional view of AA'shown in (a), and (c) is a back view. is there. It is a figure which shows the frequency characteristic of the ID tag shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
FIG. 1 is a diagram showing a configuration of an example in the first embodiment of the discriminator of the present invention, (a) is a diagram showing a surface configuration, and (b) is AA shown in (a). 'Cross-sectional view, (c) is a view showing the structure of the back surface. In FIG. 1C, the antenna 10 is shown by a broken line in order to clarify the positional relationship between the non-conductive portion 31 and the antenna 10.

In this configuration example, as shown in FIG. 1, a conductive antenna 10 is laminated on the surface of the base base material 20, and a ground pattern 30 is laminated on the back surface of the base base material 20 so as to face the antenna 10. This is an ID tag 1a in which the antenna 10 and the ground pattern 30 are arranged so as to face each other via the base base material 20.

The antenna 10 is formed by applying a conductive material to the surface of the base base material 20, has a rectangular shape, and has a resonance peak at a frequency corresponding to the shape of the antenna 10 by facing the ground pattern 30. Is expressed. In order for the resonance peak to appear when facing the ground pattern 30, the Q value of the antenna 10 alone, that is, when the antenna 10 is not facing the ground pattern 30, is 30 or less, preferably 20 or less. Alternatively, the antenna alone needs to have no resonance peak. This is because when the Q value of the antenna alone exceeds 30, the resonance peak does not appear when facing the ground pattern, while when the Q value of the antenna alone is 30 or less, it faces the ground pattern. This is because a sharp resonance peak having a Q value of 30 or more appears. The Q value is defined as the frequency at the resonance peak being ω ₀ , the frequency at which the vibration energy is half the value of the resonance peak on the lower frequency side than the resonance peak, and ω ₁ on the higher frequency side than the resonance peak. When the frequency at which the vibration energy becomes the half value of the resonance peak is ω ₂ , it is a value represented by Q = ω ₀ / (ω ₂ − ω ₁ ).

The ground pattern 30 is formed by applying a conductive material to the surface of the base base material 20, is larger than the antenna 10, and has an outer shape that covers the antenna 10 in a plan view. The ground pattern 30 has a non-conductive portion 31 to which a conductive material is not applied in a region facing the antenna 10. The non-conductive portion 31 has a shape in which the ground pattern 30 is hollowed out in a hole shape so as to face a part of the antenna 10, whereby the antenna 10 covers the non-conductive portion 31 in a plan view. It has a shape.

The base base material 10 is made of an insulating material having a thickness of about 200 to 300 μm. As the insulating material, a resin film or the like can be considered, but a material having a small dielectric loss tangent is preferable.

FIG. 2 is a diagram showing a configuration of another example in the first embodiment of the discriminator of the present invention, (a) is a diagram showing a surface configuration, and (b) is A shown in (a). -A'cross-sectional view, (c) is a view showing the structure of the back surface. In FIG. 2C, the antenna 10 is shown by a broken line in order to clarify the positional relationship between the conductive pattern 40 and the antenna 10.

In this configuration example, as shown in FIG. 2, a point in which a conductive pattern 40 serving as a conductive layer is laminated on the non-conductive portion 31 so that the entire non-conductive portion 31 is filled with the ID tag 1a shown in FIG. Is a different ID tag 1b.

FIG. 3 is a diagram showing the frequency characteristics of the ID tags 1a and 1b shown in FIGS. 1 and 2.

In the ID tag 1a shown in FIG. 1, although the antenna 10 is laminated on the front surface of the base base material 20 and the ground pattern 30 is laminated on the back surface of the base base material 20, it is a part of the antenna 10. Since the non-conductive portion 31 in which the ground pattern 30 is hollowed out in a hole shape is arranged in the opposite region, the resonance peak is not detected as shown in FIG. 3A.

On the other hand, in the ID tag 1b shown in FIG. 2, the antenna 10 is laminated on the front surface of the base base material 20, and the conductive pattern 40 is laminated on the non-conductive portion 31 on the back surface of the base base material 20. As a result, the antenna 10 faces the conductive region composed of the ground pattern 30 and the conductive pattern 40 on the entire surface thereof, so that the resonance peak is detected in the vicinity of 8.4 GHz as shown in FIG. 3 (b). ..

Therefore, the identification information can be expressed by setting "1" when the resonance peak is detected and "0" when the resonance peak is not detected. That is, in the ID tag 1a shown in FIG. 1, “0” is added as the identification information, and the resonance peak is not detected by not laminating the conductive pattern 40 on the non-conductive portion 31, and the identification information “0” is obtained. In the ID tag 1b shown in FIG. 2, "1" is added as identification information, and the resonance peak is detected by laminating the conductive pattern 40 on the non-conductive portion 31, and the identification information "1" is obtained. It will be determined.

When producing the ID tags 1a and 1b configured as described above, first, the base base material 20 is uniformly irrespective of the identification information "0" and "1" given to the ID tags 1a and 1b. The antenna 10 and the ground pattern 30 are laminated to a film thickness of, for example, 3 μm by analog printing, which is the first coating method. At this time, the thickness of the antenna 10 and the ground pattern 30 can be increased by laminating the antenna 10 and the ground pattern 30 by analog printing. Since the antenna 10 and the ground pattern 30 laminated on the base base material 20 with a thick film thickness are common to the ID tags 1a and 1b regardless of the identification information "0" and "1", the chip It is called a less RFID master pattern.

Next, firing is performed to prepare a chipless RFID precursor in which the chipless RFID master pattern is laminated on the base base material 20. The ID tag 1a shown in FIG. 1, that is, the ID tag 1a to which the identification information “0” is assigned is made of a chipless RFID precursor configured by laminating the above-mentioned chipless RFID master pattern on the base base material 20. Become. That is, the chipless RFID precursor is also the final form of the ID tag to which "0" is added as the identification information.

After that, among the ID tags 1a and 1b, only the ID tag 1b to which the identification information "1" is attached is digitally printed with the conductive pattern 40 on the non-conductive portion 31 as a second coating method, for example, a film thickness of 100 nm. Laminate on. At this time, by laminating the conductive pattern 40 by variable printing such as digital printing that does not require an actual plate, the film thickness of the conductive pattern 40 is reduced, but the ID tag 1b to which the identification information "1" is attached is attached. Can be individually laminated only.

In the ID tag 1b manufactured in this way, although the film thickness is thin due to the conductive patterns 40 being laminated by digital printing, the antenna 10 and the ground pattern 30 which are the main elements for expressing the resonance peak are As shown in FIG. 3 (b), the resonance peak is detected in the vicinity of 8.4 GHz because each of them is laminated so that the film thickness becomes thicker in analog printing.

As described above, in the present embodiment, the antenna 10 and the ground pattern 30 are uniformly laminated on the base base material 20 by analog printing to increase the thickness, and the identification information “0” given to the ID tags 1a and 1b. By individually laminating the conductive pattern 40 only on the non-conductive portion 31 in variable printing such as digital printing according to "1", a resonance peak appears according to the identification information "0" and "1". Therefore, when the conductive pattern 40 is laminated on the non-conductive portion 31, the thick film thickness of the antenna 10 and the ground pattern 30 ensures the reflection intensity, the resonance peak is surely generated, and the identification information “ By controlling whether or not the resonance peak appears according to "0" and "1" depending on the presence or absence of stacking of the conductive patterns 40 by variable printing such as digital printing, even if the identification information consists of multiple bits, It will not reduce productivity.

The application forms of the ID tags 1a and 1b shown in FIGS. 1 and 2 will be described below.

4A and 4B are views showing an example of application forms of the ID tags 1a and 1b shown in FIGS. 1 and 2, in which FIG. 4A is a diagram showing a surface configuration, and FIG. 4B is A shown in FIG. -A'cross-sectional view, (c) is a view showing the structure of the back surface.

As shown in FIG. 4, the discriminator in this example has five antennas 110a to 110e laminated on the surface of a base base material 120 made of polypropylene (PP) synthetic paper having a thickness of, for example, 300 μm, and a base. The ID tag 101a is formed by laminating a ground pattern 130 having non-conductive portions 131a to 131e corresponding to antennas 110a to 110e on the back surface of the base material 120. The antennas 110a to 110e and the ground pattern 130 are laminated so as to have a thickness of 3 μm and a resistivity of 6 μΩcm by, for example, screen printing using silver ink.

When the antenna 110a faces the ground pattern 130 via the base base material 120, a resonance peak appears in the vicinity of 7.5 GHz, and the antenna 110b faces the ground pattern 130 via the base base material 120. A resonance peak appears near 8.0 GHz, the antenna 110c faces the ground pattern 130 via the base base material 120, and a resonance peak appears near 8.5 GHz, and the antenna 110d is the base base material. A resonance peak appears in the vicinity of 9.0 GHz by facing the ground pattern 130 via 120, and the antenna 110e resonates in the vicinity of 9.5 GHz by facing the ground pattern 130 via the base base material 120. The peak appears.

5A and 5B are views showing another example of application forms of the ID tags 1a and 1b shown in FIGS. 1 and 2, in which FIG. 5A is a diagram showing a surface configuration, and FIG. 5B is shown in FIG. AA'cross-sectional view, (c) is a view showing the structure of the back surface.

As shown in FIG. 5, the discriminator in this example has conductive patterns 140c and 140e in which only two non-conductive portions 131c and 131e of the non-conductive portions 131a to 131e form a conductive layer with respect to the one shown in FIG. However, the ID tag 101b is different in that it is laminated by, for example, inkjet printing using silver nanoink. The materials constituting the conductive patterns 140c and 140e may be different from the materials constituting the ground pattern 130. Specifically, a substance different from the ground pattern 130, for example, gold, copper, aluminum, etc. may be used, and even if the substance is the same as the ground pattern 130, the particle size may be different. Further, the contained resin, for example, vinyl resin, acrylic resin, polyester resin and the like may be different. The conductive patterns 140c and 140e are laminated with the above materials and then fired to obtain a thickness of 100 nμm and a resistivity of 6 μΩcm.

FIG. 6 is a diagram showing the frequency characteristics of the ID tags 101a and 101b shown in FIGS. 4 and 5.

In the ID tag 101a shown in FIG. 4, five antennas 110a to 110e having different frequencies at which resonance peaks appear are laminated on the surface of the base base material 120, and the ground pattern 130 is laminated on the back surface of the base base material 120. However, since the non-conductive portions 131a to 131e are arranged in the regions facing a part of the antennas 110a to 110e, the resonance peak is not detected as shown in FIG. 6A.

On the other hand, in the ID tag 101b shown in FIG. 5, five antennas 110a to 110e having different frequencies at which resonance peaks appear are laminated on the surface of the base base material 120, and on the back surface of the base base material 120. Of the non-conductive portions 131a to 131e, the conductive patterns 140c and 140e are laminated on the non-conductive portions 131c and 131e corresponding to the antennas 110c and 110e, so that the antennas 110c and 110e have the ground pattern 130 and the conductive pattern on the entire surface thereof. Since it faces the conductive region consisting of 140c and 140e, resonance peaks are detected in the vicinity of 8.5 GHz and 9.5 GHz as shown by the solid line in FIG. 6 (b). When the conductive patterns are laminated on all of the non-conductive portions 131a to 131e, resonance peaks are detected for all of the antennas 110a to 110e as shown by the broken line in FIG. 6B.

FIG. 7 is a diagram showing an example of an ID discrimination system that discriminates the ID assigned to the ID tag 101b shown in FIG.

As shown in FIG. 7, the ID discrimination system in this example is composed of the ID tag 101b shown in FIG. 5 and the reader 50 that recognizes the ID assigned to the ID tag 101b, and the reader 50 includes the transmitting antenna 51a. It has a receiving antenna 51b, a transmitting unit 52, a receiving unit 53, a processing unit 54, and a control unit 55.

The transmitting unit 52 generates an electromagnetic wave including the frequency of the resonance peak of the antennas 110a to 110e, and irradiates the electromagnetic wave through the transmitting antenna 51a.

The receiving unit 53 receives the reflected wave from the ID tag 101b for the electromagnetic wave radiated from the transmitting unit 52 via the transmitting antenna 51a via the receiving antenna 51b, and detects the level of the received power of the reflected wave.

The processing unit 54 detects the resonance peak in the ID tag 101b according to the level of the received power detected by the receiving unit 53, and among the frequencies of the resonance peaks of the antennas 110a to 110e, the frequency at which the resonance peak is detected is defined. The individual ID is set to "1", the individual ID for the frequency at which the resonance peak is not detected is set to "0", and these "1" and "0" are arranged in the order of frequency, thereby being assigned to the ID tag 101b. ID is determined.

The control unit 55 controls the irradiation of electromagnetic waves by the transmission unit 52 and each processing by the processing unit 54.

When the ID assigned to the ID tag 101b is determined by using the reader 50 configured as described above, the transmission unit 52 has a frequency including the resonance peaks of the antennas 110a to 110e of 7.5 GHz to 9.5 GHz. While sweeping the band, the electromagnetic wave of the frequency band is irradiated to the ID tag 101b via the transmitting antenna 51a.

Then, the reflected wave from the ID tag 101b is received by the receiving unit 53 via the receiving antenna 51b, the level of the received power of the reflected wave is detected, and the receiving unit 54 detects the reception by the receiving unit 53. Resonance peaks are detected by the level of power. In the ID tag 101b shown in FIG. 5, as described above, the conductive patterns 140c and 140e are laminated on the non-conductive portions 131c and 131e corresponding to the antennas 110c and 110e among the non-conductive portions 131a to 131e. Since the antennas 110c and 110e face the conductive region composed of the ground pattern 130 and the conductive patterns 140c and 140e on the entire surface thereof, the received power of the reflected wave received by the receiving unit 53 is 8.5 GHz and 9 It has a resonance peak in the vicinity of each of .5 GHz.

Since the frequencies of the resonance peaks of the antennas 110a to 110e are at equal intervals of 0.5 GHz, the processing unit 54 sets the individual ID for the frequency at which the resonance peak is detected at intervals of 0.5 GHz to "1". , And the individual ID for the frequency at which the resonance peak was not detected is set to "0", and "1" and "0", which are the binary information, are arranged in the order of low frequency, for example, so that the ID tag 101b The ID assigned to is determined. In the ID tag 101b shown in FIG. 5, since the resonance peak is detected at each of 8.5 GHz and 9.5 GHz as described above, the individual IDs “0”, “0”, “1”, The ID "00101" in which "0" and "1" are arranged in this order is determined.

As described above, in the configuration having the plurality of antennas 110a to 110e and the plurality of non-conductive portions 131a to 131e corresponding thereto, the conductive pattern is laminated on at least one of the non-conductive portions 131a to 131e. Of the plurality of antennas 110a to 110e, a resonance peak appears for the antenna in which the conductive pattern is laminated on the corresponding non-conductive portions 131a to 131e, and the antenna in which the conductive pattern is not laminated on the corresponding non-conductive portion is generated. Depending on whether or not the resonance peak does not appear and this resonance peak appears, "1" and "0", which are the values for each bit constituting the identification information, are set for each of a plurality of antennas, and these values are combined. , It becomes possible to discriminate the identification information consisting of multiple bits.

(Second Embodiment)
FIG. 8 is a diagram showing a configuration of an example in the second embodiment of the discriminator of the present invention, (a) is a diagram showing a surface configuration, and (b) is AA shown in (a). 'Cross-sectional view, (c) is a view showing the structure of the back surface. In FIG. 8C, the antenna 210 is shown by a broken line in order to clarify the positional relationship between the non-conductive portion 231 and the antenna 210.

As shown in FIG. 8, this configuration example is an ID tag 201a in which the shape of the non-conductive portion 231 is different from that of the ID tag 1a shown in FIG. The non-conductive portion 231 in this configuration example exists up to a region not facing the antenna 210.

9A and 9B are views showing the configuration of another example in the second embodiment of the discriminator of the present invention, (a) is a diagram showing a surface configuration, and (b) is A shown in (a). -A'cross-sectional view, (c) is a view showing the structure of the back surface. In FIG. 9C, the antenna 210 is shown by a broken line in order to clarify the positional relationship between the conductive pattern 240 and the antenna 210.

In this configuration example, as shown in FIG. 9, the conductive pattern 240 serving as the conductive layer is laminated on the ID tag 201a shown in FIG. 8 facing the antenna 210 only on a part of the non-conductive portion 231. The ID tag 201b has a different point.

In the ID tags 201a and 201b shown in FIGS. 8 and 9, similarly to the ID tags 1a and 1b shown in FIGS. 1 and 2, the surface of the base base material 220 is formed in the ID tag 201a shown in FIG. Although the antenna 210 is laminated on the antenna 210 and the ground pattern 230 is laminated on the back surface of the base base material 220, the resonance peak is caused by the non-conductive portion 231 being arranged in the region facing a part of the antenna 210. Is not detected, and in the ID tag 201b shown in FIG. 9, the antenna 210 is laminated on the front surface of the base base material 220, and on the back surface of the base base material 220, the non-conductive portion 231 faces the antenna 210. Since the conductive patterns 240 are laminated, the resonance peak is detected because the antenna 210 faces the conductive region including the ground pattern 230 and the conductive pattern 240 on the entire surface thereof. Then, when the resonance peak is detected, the identification information is determined to be "1", and when the resonance peak is not detected, the identification information is determined to be "0".

(Third Embodiment)
10A and 10B are views showing a third embodiment of the discriminator of the present invention, in which FIG. 10A is a diagram showing a surface configuration, and FIG. 10B is a sectional view taken along the line AA'shown in FIG. (C) is a figure which shows the structure of the back surface. In FIG. 10C, the antenna 310 is shown by a broken line in order to clarify the positional relationship between the non-conductive portion 331 and the conductive pattern 340 and the antenna 310.

As shown in FIG. 10, this configuration example is an ID tag 301 in which the arrangement of the conductive pattern 340 is different from that of the ID tag 201b shown in FIG. The conductive pattern 340 in this configuration example faces only a part of the antenna 310 in the non-conductive portion 331. That is, the antenna 310 has a region that does not face the ground pattern 330 or the conductive pattern 340.

FIG. 11 is a diagram showing the frequency characteristics of the ID tag 301 shown in FIG.

In the ID tag 301 shown in FIG. 10, the antenna 310 is laminated on the surface of the base base material 320, and the base base material 320 is similar to the ID tags 1b and 201b shown in FIGS. 2 and 9. On the back surface of the above, a ground pattern 330 having a non-conductive portion 331 is laminated, and a conductive pattern 340 is laminated on the non-conductive portion 331, so that the frequency characteristic is a resonance peak as shown in FIG. It is supposed to have. However, unlike the ID tags 1b and 201b shown in FIGS. 2 and 9, the ID tag 301 has a region in which the antenna 310 does not face the ground pattern 330 or the conductive pattern 340. As shown in FIG. 8, the frequency at which the resonance peak appears is shifted to the low frequency side with respect to the frequency characteristics shown in FIG.

As described above, since the resonance peak also appears in the ID tag 301 of the present embodiment, the identification information “1” can be discriminated by laminating the conductive pattern 340 on the non-conductive portion 331 by variable printing such as digital printing. However, since the antenna 310 has a region that does not face the ground pattern 330 or the conductive pattern 340, the frequency at which the resonance peak appears shifts, so the amount of overlap between the antenna 310 and the conductive pattern 340 should be adjusted. Therefore, the frequency at which the resonance peak appears can be adjusted.

(Fourth Embodiment)
12A and 12B are views showing the configuration of an example according to the fourth embodiment of the discriminator of the present invention, in which FIG. 12A is a diagram showing a surface configuration, and FIG. 12B is a diagram shown in FIG. 12A. 'Cross-sectional view, (c) is a view showing the structure of the back surface. In FIG. 12C, the antenna 410 is shown by a broken line in order to clarify the positional relationship between the non-conductive portion 431 and the antenna 410.

As shown in FIG. 12, this configuration example is an ID tag 401a in which the shape of the non-conductive portion 231 is different from that of the ID tag 1a shown in FIG. The non-conductive portion 431 in this configuration example does not have a shape in which the ground pattern 430 is hollowed out in a hole shape, but has a shape in which the ground pattern 430 is hollowed out in a slit shape from its end side.

FIG. 13 is a diagram showing the configuration of another example in the fourth embodiment of the discriminator of the present invention, (a) is a diagram showing a surface configuration, and (b) is A shown in (a). -A'cross-sectional view, (c) is a view showing the structure of the back surface. In FIG. 13C, the antenna 410 is shown by a broken line in order to clarify the positional relationship between the conductive pattern 440 and the antenna 410.

In this configuration example, as shown in FIG. 13, a conductive pattern 440 serving as a conductive layer is laminated on the ID tag 401a shown in FIG. 12 facing the antenna 410 only on a part of the non-conductive portion 431. The ID tag 401b has a different point.

In the ID tags 401a and 401b shown in FIGS. 12 and 13, similarly to the ID tags 201a and 201b shown in FIGS. 1 and 2, the ID tag 401a shown in FIG. 12 has the surface of the base base material 420. Although the antenna 410 is laminated on the antenna 410 and the ground pattern 430 is laminated on the back surface of the base base material 420, the resonance peak is caused by arranging the non-conductive portion 431 in the region facing a part of the antenna 410. Is not detected, and in the ID tag 401b shown in FIG. 13, the antenna 410 is laminated on the front surface of the base base material 420, and on the back surface of the base base material 420, the non-conductive portion 431 faces the antenna 410. Since the conductive patterns 440 are laminated, the resonance peak is detected because the antenna 410 faces the conductive region including the ground pattern 430 and the conductive pattern 440 on the entire surface thereof. Then, when the resonance peak is detected, the identification information is determined to be "1", and when the resonance peak is not detected, the identification information is determined to be "0".

1a, 1b, 101a, 101b, 201a, 201b, 301, 401a, 401b ID tag 10,110a to 110e, 210,310,410 Antenna 20,120,220,320,420 Base base material 30,130,230,330 , 430 Ground pattern 31, 131a to 131e, 231, 331, 431 Non-conductive part 40, 140c, 140e, 240, 340, 440 Conductive pattern 50 Reader 51a Transmit antenna 51b Receive antenna 52 Transmit part 53 Receiver 54 Processing part 55 Department

Claims (4)

It is an discriminator to which identification information that is discriminated by the presence or absence of detection of a resonance peak is given.
With the base base material
An antenna laminated on one surface of the base base material and
It is laminated on the other surface of the base base material, has an outer shape that covers the antenna in a plan view, and is provided in a region facing at least a part of the antenna according to the identification information given to the discriminator. It has a ground pattern including a non-conductive portion on which a conductive layer is laminated, and has a ground pattern.
The antenna is an discriminator in which the resonance peak appears when the conductive layer is laminated on the non-conductive portion. In the discriminator according to claim 1,
It has a plurality of antennas having different resonance peak frequencies and a plurality of non-conductive portions corresponding thereto.
The conductive layer is an discriminator that is laminated on at least one of the plurality of non-conductive portions according to the identification information given to the discriminator. In the discriminator according to claim 1 or 2.
The antenna is an discriminator having a Q value of 30 or less when not facing the ground pattern. The method for manufacturing an identifying body according to any one of claims 1 to 3.
The ground having the antenna laminated on one surface of the base base material and the non-conductive portion on the other surface of the base base material by using the first coating method of applying the conductive material. The process of stacking patterns and
Manufacture of an discriminator having a step of laminating the conductive layer on the non-conductive portion according to the identification information given to the discriminator by using a second coating method different from the first coating method. Method.

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