A processing method for anti-disassembly type RFID antenna

Abstract

The present invention is a method for processing an anti-disassembly type RFID antenna, wherein a fragile pattern and a positioning identification pattern are synchronously printed on the surface of one side of the antenna bearing substrate by a gravure printing machine, and when the colorless fragile pattern is aligned with the RFID antenna pattern on the back of the metal aluminum foil, the colored identification pattern can be used to achieve alignment with the RFID antenna pattern. The present invention realizes that the anti-counterfeiting fragile pattern printed by colorless and transparent weak-viscous ink and the RFID antenna pattern on the other side of the metal aluminum foil are accurately aligned during processing, have an accurate relative position relationship, and obtain a specific part of the RFID antenna that becomes fragile and anti-disassembly, thereby enhancing the anti-counterfeiting effect and meeting the personalized anti-counterfeiting requirements of customers or some special scene requirements.

Description

Technical Field

[0001] The invention relates to the fields of information technology and anti-counterfeiting, and in particular discloses a processing method of an anti-disassembly type RFID antenna. Background Art

[0002] The current product anti-counterfeiting situation is quite severe. The market demand for product anti-counterfeiting is gradually increasing, and the requirements for anti-counterfeiting products are getting higher and higher. The industry generally adopts fragile and anti-tampering RFID tags to achieve this, while taking into account the difficulty of counterfeiting and cost-effectiveness, so that RFID tags cannot or are inconvenient to be reused, making it impossible for crackers to counterfeit in batches.

[0003] The fragile and anti-tampering design currently used in RFID tags is to add a weak peeling layer to the original aluminum etched antenna structure, so that the bonding force between the aluminum RFID antenna on the RFID tag and the PET antenna carrier layer becomes extremely weak. In this way, when counterfeiters want to remove the RFID tag attached to the surface of the package, the aluminum RFID antenna will be peeled off from the PET antenna carrier layer under the action of the adhesive. In addition, since the aluminum RFID antenna is generally less than 0.03mm thick, it does not have sufficient rigidity and is easily torn or severely deformed, affecting the antenna's radio frequency performance, thereby preventing the RFID tag from being completely removed and reused.

[0004] The production process of the aluminum anti-tamper RFID antenna on the current RFID tag is as follows:

[0005] 1. First, a transparent weak-viscous ink is gravure-printed on one side of the antenna-bearing substrate and then dried. The antenna-bearing substrate is generally made of a transparent PET film material.

[0006] 2. Next, an adhesive is applied to the side of the antenna-bearing substrate printed with weakly viscous ink, thereby bonding the metal aluminum foil to the surface of the antenna substrate.

[0007] 3 Next, the RFID antenna pattern and positioning mark are printed on the surface of the aluminum foil through a gravure printing machine, and the ink used is an anti-etching ink.

[0008] 4. Next, the printed composite material is etched. The RFID antenna pattern and positioning mark covered by the anti-etching ink will not be etched away and will continue to remain on the surface of the antenna substrate. The remaining aluminum foil will be removed after etching.

[0009] 5. Next, the etched composite material is passed through a cleaning tank to clean the remaining anti-etching ink and residual etching solution on the surface of the aluminum foil.

[0010] 6. Finally, after the drying process, the moisture is removed to obtain a continuous roll with RFID antenna graphics and positioning marks.

[0011] The steps including corona treatment of the antenna carrier substrate used during the process to increase the adhesion of the adhesive, annealing of the aluminum foil surface to increase the cleanliness of the aluminum foil surface, and subsequent chip bonding are all subordinate nodes and will not be described in detail here.

[0012] According to the attached Figure 1 , the weak-viscous ink and the anti-etching ink are respectively on the front and back of the metal aluminum foil. If the weak-viscous ink has a certain color or geometric thickness, when the relative position relationship with the front RFID antenna pattern needs to be determined, the traditional gravure printing process can still easily solve the positioning of the two ink layers through optical sensors or visual sensors. However, the industry currently generally uses colorless and transparent weak-viscous ink materials, which cannot be distinguished by optical sensors and visual sensors. Another commonly used thickness sensor cannot accurately judge the position relationship of the two ink layers because the weak-viscous ink is only about 0.002mm thick. Therefore, it cannot be used when the colorless and transparent weak-viscous ink needs to be printed with fragile patterns for anti-counterfeiting, and the RFID antenna pattern on the other side of the metal aluminum foil needs to be accurately positioned to achieve specific parts of fragile and anti-tampering use occasions. This has also become a technical problem in the current industry. Therefore, the anti-tear RFID antennas currently on the market do not have the characteristics that specific areas of the antenna are easily damaged, but the entire RFID antenna is easily damaged. Summary of the invention

[0013] The purpose of the present invention is to solve the defects of the prior art and design a processing method for an anti-dismantling RFID antenna. Based on the ordinary fragile RFID antenna in the prior art, the present invention aims at the personalized requirements of customers or some special scene requirements under the increasingly severe anti-counterfeiting environment. A colorless, transparent, weakly viscous ink is used to print a fragile pattern for anti-counterfeiting, and the pattern is accurately positioned with the RFID antenna pattern on the other side of the metal aluminum foil, so that a specific part of the RFID antenna becomes fragile and anti-dismantling.

[0014] The present invention is implemented as follows: a method for processing an anti-disassembly type RFID antenna, characterized in that the processing method for the anti-disassembly type RFID antenna comprises the following steps:

[0015] S1. Printing a fragile pattern and a positioning mark pattern on one side of the antenna bearing substrate simultaneously with a gravure printing machine, and drying the printed circuit board. The antenna bearing substrate is made of a transparent PET film material.

[0016] In step S1, the gravure roller of the gravure printing machine is divided into two parts in the axial direction, one end is a part engraved with a fragile pattern, and the other end is a part engraved with a positioning mark pattern. Different inks are used at the two ends. The fragile pattern part uses colorless, transparent, weakly viscous ink, while the positioning mark pattern part uses ordinary black or blue ink that easily absorbs light to print a colored mark pattern.

[0017] At the same time, the ink tank under the gravure roller for printing fragile patterns and positioning identification patterns is also divided into two parts. One part corresponds to the part of the gravure roller engraved with the positioning identification pattern and is filled with colored ink, and the other part corresponds to the part of the gravure roller engraved with the fragile pattern and is filled with colorless weakly viscous ink.

[0018] S2. Apply adhesive to the side of the antenna carrier substrate on which the fragile pattern and the positioning mark pattern are printed, and then bond the metal aluminum foil thereon to form a composite with the antenna carrier substrate.

[0019] S3, using a gravure printing press to print an RFID antenna pattern on the surface of the metal aluminum foil, the ink used is an anti-etching ink, the printing roller on the gravure printing press is provided with the same positioning identification pattern as in step S2, the two identification patterns are used for positioning, the RFID antenna pattern is aligned with the fragile pattern in step S2, and the fragile pattern and the RFID antenna pattern are overlapped at a set position. The positioning of the two identification patterns is carried out by optical sensors or visual sensors to accurately align the upper and lower positioning identification patterns.

[0020] S4. The printed composite material is etched to form an RFID antenna by using an etching process, and the metal aluminum foil of the RFID antenna portion is retained after etching.

[0021] S5. Place the etched composite material into a cleaning tank to clean the remaining anti-etching ink and residual etching solution on the surface of the metal aluminum foil.

[0022] S6. After drying, water is removed to obtain a continuous roll material with an RFID antenna.

[0023] The beneficial effects of the present invention are as follows: the present invention improves the existing processing technology, and the gravure roller of the gravure printing machine is divided into two parts in the axial direction, one end is a part engraved with a fragile pattern, and the other end is a part engraved with a positioning mark pattern. Different inks are used at the two ends, and the fragile pattern part uses colorless, transparent, weakly viscous ink, while the positioning mark pattern part uses black or blue ordinary ink that easily absorbs light to print a colored mark pattern. When the colorless fragile pattern is placed on the RFID antenna pattern on the back of the metal aluminum foil, the colored mark pattern can be used to achieve registration with the RFID antenna pattern. The present invention realizes that the fragile anti-counterfeiting pattern printed by the colorless, transparent, weakly viscous ink and the RFID antenna pattern on the other side of the metal aluminum foil are accurately placed during processing, have an accurate relative position relationship, and obtain an RFID antenna whose specific part becomes fragile and anti-disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the distribution structure of each layer when the existing anti-disassembly type RFID antenna is manufactured.

[0025] Figure 2 It is a schematic diagram of the structure of the semi-finished product after being processed in step S2 in the embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the distribution structure of each layer when the anti-disassembly type RFID antenna manufactured in an embodiment of the present invention is manufactured.

[0027] Figure 4 It is a schematic diagram of the corresponding position relationship between the gravure printing roller and the ink tank below used in the embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of the state of the antenna after the fragile pattern part of the peeled RFID antenna is separated from the rest of the antenna in an embodiment of the present invention.

[0029] Figure 6 The present invention is a schematic diagram of a state in which a label of a tamper-proof RFID antenna made by the present invention is attached to the surface of a commodity.

[0030] Figure 7 The present invention is a schematic diagram of a state in which a label of the anti-disassembly type RFID antenna manufactured by the present invention is peeled off the surface of a commodity.

[0031] 10. Antenna carrier substrate; 11. Adhesive; 12. Metal aluminum foil; 13. Strong self-adhesive sticker; 14. RFID chip; 15. Product surface; 31. Colored ink; 32. Colorless weak-viscous ink; 310. Positioning identification pattern; 320. Fragile pattern. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] According to the attached Figure 2 ~Attached Figure 7 The present invention is a method for processing an anti-disassembly type RFID antenna. Taking the production of an anti-disassembly type RFID UHF antenna as an example, the specific processing steps are as follows:

[0034] 1. First, a fragile pattern 320 printed with colorless weak-viscosity ink and a positioning mark pattern 310 printed with colored ink are printed on one side of the antenna carrier substrate 10 by a gravure printing machine, and then dried. The antenna carrier substrate is generally made of transparent PET film material.

[0035] According to the attached Figure 4 The gravure roller of the gravure printing machine is divided into two parts in the axial direction, one end is a part engraved with a fragile pattern (the word "ABC" is used in this embodiment), and the other end is a part engraved with a positioning mark pattern. Different inks are used at the two ends. The fragile pattern part uses colorless, transparent, weakly viscous ink, while the positioning mark pattern part uses black or blue ordinary ink that easily absorbs light to print a colored mark pattern. In this way, when the colorless fragile pattern is subsequently aligned with the RFID antenna pattern on the back of the aluminum foil, the colored mark pattern next to the fragile pattern can be used to align with the RFID antenna pattern. At the same time, the conventional printing ink tank is an integral structure, while the ink tank is divided into two parts in the present invention, one part is colored ink, that is, colored ink 31, corresponding to the part of the gravure roller engraved with the positioning mark pattern, and the other part is colorless, weakly viscous ink 32, corresponding to the part of the gravure roller engraved with the fragile pattern.

[0036] 2. Apply adhesive 11 to the side of the antenna carrier substrate 10 printed with the fragile pattern 320 and the positioning mark pattern 310 , and then bond the metal aluminum foil 12 thereon to form a composite with the antenna carrier substrate 10 .

[0037] 3. The RFID antenna pattern is printed on the surface of the metal aluminum foil 12 by a gravure printing machine. The ink used is an anti-etching ink. The printing roller used for printing the RFID antenna pattern is also provided with a positioning mark pattern that corresponds to the position of the positioning mark pattern on the gravure roller used to print the fragile pattern and has the same pattern. The upper and lower layers of the positioning mark pattern are accurately aligned by an optical sensor or a visual sensor. In this embodiment, the positioning mark pattern adopts a "cross" geometric pattern. If the upper and lower "cross" positioning mark patterns are confirmed to be accurately aligned, it can be considered that the RFID antenna pattern and the fragile pattern printed with weak viscosity ink are accurately aligned.

[0038] 4. The printed composite material is etched by an etching process to etch the RFID antenna. The RFID antenna covered by the anti-etching ink will not be etched away and will continue to remain on the surface of the antenna-bearing substrate. The remaining aluminum foil is removed after etching.

[0039] 5. Place the etched composite material into a cleaning tank to clean the remaining anti-etching ink and residual etching solution on the surface of the aluminum foil.

[0040] 6. After the drying process, the moisture is removed and a continuous roll with RFID antenna is obtained.

[0041] At this point, the processing and production of the main part of the RFID anti-tampering tag, the anti-tampering RFID antenna, has been completed.

[0042] According to the attached Figure 6 and attached Figure 7 When this anti-disassembly RFID antenna is processed into an RFID tag and affixed to the surface 16 of the product, due to the effect of the strong adhesive 13, when the RFID tag wants to be peeled off the surface 16 of the product, the weak adhesive under the three letters of the fragile pattern "ABC" has a relatively weak bonding force, which will cause the aluminum foil of the three letters of the fragile pattern "ABC" to be left on the surface of the product, and the rest of the antenna will be peeled off the surface of the product. In this way, even if the anti-disassembly RFID antenna is reused, it can be conveniently identified whether the RFID tag is reused based on whether there is a missing part of the fragile pattern "ABC" on it. In addition, the fragile pattern can also be designed to overlap with the key part of the antenna. When this part is separated from the RFID antenna, the RFID antenna immediately loses its electrical performance and cannot communicate with the outside world, achieving a dual anti-disassembly effect of RFID tag failure and antenna appearance defect.

[0043] The processing method of the present invention can also be used to manufacture a disassembly-resistant high-frequency antenna, the only difference being the processing steps of the antenna itself.

Claims

1. A method for processing an anti-disassembly type RFID antenna, characterized in that The processing steps of the anti-disassembly type RFID antenna are as follows: S1. Printing a fragile pattern and a positioning mark pattern on the surface of one side of the antenna bearing substrate by a gravure printing machine, and drying the printed pattern; S2, applying adhesive to the side of the antenna carrier substrate on which the fragile pattern and the positioning mark pattern are printed, and then bonding the metal aluminum foil thereon to form a composite with the antenna carrier substrate; S3, printing the RFID antenna pattern on the surface of the metal aluminum foil by using a gravure printing machine, the ink used is an anti-etching ink, the printing roller on the gravure printing machine is provided with the same positioning identification pattern as in step S2, and the RFID antenna pattern is positioned by the two identification patterns, and the RFID antenna pattern is aligned with the fragile pattern in step S2; S4, etching the printed composite material to etch the RFID antenna using an etching process, and retaining the metal aluminum foil of the RFID antenna portion after etching; S5, placing the etched composite material into a cleaning tank to clean the remaining anti-etching ink and residual etching solution on the surface of the metal aluminum foil; S6, removing moisture through drying to obtain a continuous roll with an RFID antenna; In step S1, the gravure roller of the gravure printing machine is divided into two parts in the axial direction, one end is a part engraved with a fragile pattern, and the other end is a part engraved with a positioning mark pattern. Different inks are used at the two ends. The fragile pattern part uses colorless, transparent, weakly viscous ink, while the positioning mark pattern part uses black or blue ordinary ink that easily absorbs light to print a colored mark pattern; The ink tank for printing the fragile pattern and the positioning mark pattern in step S1 is divided into two parts, one part corresponds to the part of the gravure roller engraved with the positioning mark pattern and is filled with colored ink, and the other part corresponds to the part of the gravure roller engraved with the fragile pattern and is filled with colorless weakly viscous ink.

2. The method for processing a disassembly-resistant RFID antenna according to claim 1, characterized in that: The fragile pattern and the RFID antenna pattern overlap at a set position.

3. According to the method for processing a disassembly-resistant RFID antenna according to claim 1, it is characterized in that: The positioning of the two identification patterns in step S3 is performed by using an optical sensor or a visual sensor to accurately align the upper and lower layers of the positioning identification patterns.

4. The method for processing a disassembly-resistant RFID antenna according to claim 1, characterized in that: The antenna bearing substrate is made of transparent PET film material.

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