Flexible RFID electronic tag

Abstract

The utility model discloses a flexible RFID electronic tag which comprises a chip, a small-size hard substrate, a short circuit ring arranged on the hard substrate, a large-size flexible substrate and an antenna arm arranged on the flexible substrate. The antenna arm comprises a middle annular structure and oscillator structures on the two sides, and the two ends of the annular structure are connected with the two oscillator structures respectively. The chip is attached to the short circuit ring and is electrically connected with the short circuit ring; the area surrounded by the annular structure is slightly larger than the area of the short circuit ring. And the hard substrate is bonded on the soft substrate, and the short circuit ring is positioned in the annular structure to form near field communication with the annular structure. The flexible RFID electronic tag adopts a two-layer substrate structure, the proportion of the hard substrate which cannot be naturally degraded is reduced, the overall flexibility of the product can be improved, and the risk of environmental pollution is reduced at the same time.

Description

Technical Field

[0001] The utility model relates to the field of RFID electronic tags, in particular to a flexible RFID electronic tag. Background Art

[0002] In the production process of RFID electronic tags, the traditional inlay (referring to the pre-laminated product of RFID electronic tags without any printed patterns on the surface) binding process is to glue the chip to the antenna by hot pressing, and the antenna is presented on the PET or paper substrate by etching or laser. However, soft materials will cause the shear force of the inlay to be low, and some substrates are not resistant to high temperatures, which are not ideal chip substrates. Utility Model Content

[0003] In order to solve the above problems of the prior art, the utility model provides a flexible RFID electronic tag, and the technical solution is as follows:

[0004] A flexible RFID electronic tag comprises: a chip, a hard substrate, a short-circuit ring arranged on the hard substrate, a soft substrate and an antenna arm arranged on the soft substrate;

[0005] The antenna arm comprises a ring-shaped structure in the middle and two vibrator structures connected to the ring-shaped structure at both sides;

[0006] The chip is attached to the short-circuit ring and is electrically connected to the short-circuit ring;

[0007] The size of the flexible substrate is larger than the size of the hard substrate;

[0008] The size of the annular structure is slightly larger than the size of the short-circuit ring;

[0009] The hard substrate is bonded to the middle of the flexible substrate, and the hard substrate or the short-circuit ring is located in the annular structure, so that the short-circuit ring and the annular structure form near field communication.

[0010] Furthermore, a length ratio of the hard substrate to the flexible substrate is less than or equal to 1 / 4, and a width ratio of the hard substrate to the flexible substrate is less than or equal to 0.8.

[0011] Furthermore, the single-side spacing between the annular structure and the short-circuit ring is within 5 mm.

[0012] Furthermore, the material of the hard substrate is PET or PI.

[0013] Furthermore, the thickness of the hard substrate ranges from 25 μm to 50 μm.

[0014] Furthermore, the material of the flexible substrate is a paper-based material.

[0015] Furthermore, the thickness of the flexible substrate ranges from 50 μm to 150 μm.

[0016] Furthermore, the thickness of the short-circuit ring and the antenna arm ranges from 18 μm to 50 μm.

[0017] Furthermore, the short-circuit ring is formed on the hard substrate by etching or printing.

[0018] Furthermore, the antenna arm is formed on the flexible substrate by etching or printing.

[0019] The utility model achieves the following technical effects:

[0020] The flexible RFID electronic tag of the utility model adopts a two-layer substrate structure, which reduces the proportion of the hard substrate that is not naturally degradable, improves the overall softness of the product, and reduces the risk of environmental pollution.

[0021] The flexible RFID electronic tag of the utility model has a simple structure and is easy to implement. The short-circuit ring can move within the range of the ring structure in the middle of the antenna arm, and the performance deviation is within an acceptable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded view of the flexible RFID electronic tag of the utility model;

[0023] Figure 2 It is a schematic diagram of the stacking of the flexible RFID electronic tag of the utility model;

[0024] Figure 3 This is a positional relationship diagram of the short-circuit ring and the antenna arm of the flexible RFID electronic tag of the utility model. DETAILED DESCRIPTION

[0025] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figures 1 to 3As shown, the embodiment of the utility model provides a new type of flexible RFID tag, which includes a chip 1, a small-sized hard substrate 4, a short-circuit ring 2 (loop) arranged on the hard substrate 4, a large-sized soft substrate 5 and an antenna arm 3 arranged on the soft substrate 5.

[0028] The antenna arm 3 includes a ring structure 31 in the middle and dipole structures 32 and 33 at both sides. Both ends of the ring structure 31 are connected to the two dipole structures 32 and 33 respectively.

[0029] The chip 1 is attached to the short-circuit ring 2 and is electrically connected to the short-circuit ring 2 .

[0030] The area surrounded by the annular structure 31 in the middle of the antenna arm 3 is slightly larger than the area of ​​the short-circuit ring 2. The hard substrate 4 is bonded to the soft substrate 5, and the short-circuit ring 2 falls within the area surrounded by the annular structure 31, and forms near-field communication with the annular structure 31, so that the short-circuit ring 2 and the antenna arm 3 form a complete RFID antenna. Preferably, the single-side spacing between the annular structure 31 and the short-circuit ring 2 is controlled within 5 mm.

[0031] In a specific application, the shape of the antenna arm 3 is not particularly limited, and the existing RFID tag antenna structure design can be adopted, and the original short-circuit ring part is removed to perform relevant designs for chip assembly.

[0032] exist Figure 3 In the example, the size (length × width) of the hard substrate 4 is 13mm × 12mm; the size (length × width) of the flexible substrate 5 is 45mm × 18mm. The area of ​​the hard substrate 4 accounts for only about 20%. To ensure the overall softness, preferably, the length ratio of the hard substrate 4 and the flexible substrate 5 is less than or equal to 1 / 4; the width ratio of the hard substrate 4 and the flexible substrate 5 is less than or equal to 0.8.

[0033] In this embodiment, the hard substrate 4 adopts a high temperature resistant, hard substrate, such as PET (polyethylene terephthalate) material, PI (polyimide) material, etc., and the soft substrate 5 adopts a soft ordinary substrate, such as thermal paper, barcode paper and other paper-based materials.

[0034] Preferably, the short-circuit ring 2 and the antenna arm 3 have a thickness ranging from 18 μm to 50 μm, and can be made of materials such as copper, aluminum or conductive ink (such as carbon paste) and formed on a substrate by etching or printing.

[0035] Preferably, the thickness of the hard substrate 4 is in the range of 25 μm to 50 μm to provide sufficient shear force.

[0036] Preferably, the thickness of the flexible substrate 5 is in the range of 50 μm to 150 μm to provide sufficient flexibility.

[0037] The manufacturing method of the flexible RFID electronic tag of the utility model is as follows:

[0038] A high temperature resistant and hard material such as PET is selected as the hard substrate 4 of the short-circuit ring 2 which is in direct contact with the chip 1; a paper-based material or other soft organic material is selected as the soft substrate 5 of the antenna arm 3; the chip 1 is combined with the short-circuit ring 2 on the hard substrate 4 by high temperature hot pressing; and the hard substrate 4 is bonded to the soft substrate 5 by glue, so that the short-circuit ring 2 on the hard substrate 4 and the antenna arm 3 of the soft substrate 5 form near field communication.

[0039] The flexible RFID electronic tag of the utility model has the following advantages:

[0040] This approach will reduce the risk of environmental pollution and reduce the proportion of non-biodegradable materials such as PET.

[0041] As the proportion of hard materials in PET is reduced, the overall softness of the product can be improved.

[0042] The flexible RFID electronic tag of the utility model has a simple structure and is easy to implement. The short-circuit ring can move within the range of the ring structure in the middle of the antenna arm without precise positioning, and the performance deviation is within an acceptable range.

[0043] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A flexible RFID electronic tag, characterized in that: include: A chip, a hard substrate, a short-circuit ring disposed on the hard substrate, a flexible substrate, and an antenna arm disposed on the flexible substrate; The antenna arm comprises a ring-shaped structure in the middle and two vibrator structures connected to the ring-shaped structure at both sides; The chip is attached to the short-circuit ring and is electrically connected to the short-circuit ring; The size of the flexible substrate is larger than the size of the hard substrate; The size of the annular structure is slightly larger than the size of the short-circuit ring; The hard substrate is bonded to the middle of the flexible substrate, and the hard substrate or the short-circuit ring is located in the annular structure, so that the short-circuit ring and the annular structure form near field communication.

2. The flexible RFID electronic tag according to claim 1, characterized in that: The length ratio of the hard substrate to the flexible substrate is less than or equal to 1 / 4, and the width ratio of the hard substrate to the flexible substrate is less than or equal to 0.

8.

3. The flexible RFID electronic tag according to claim 1, characterized in that: The single-side distance between the annular structure and the short-circuit ring is within 5 mm.

4. The flexible RFID electronic tag according to claim 1, characterized in that: The material of the hard substrate is PET or PI.

5. The flexible RFID electronic tag according to claim 1, characterized in that: The thickness of the hard substrate ranges from 25 μm to 50 μm.

6. The flexible RFID electronic tag according to claim 1, characterized in that: The material of the flexible substrate is a paper-based material.

7. The flexible RFID electronic tag according to claim 1, characterized in that: The thickness of the flexible substrate ranges from 50 μm to 150 μm.

8. The flexible RFID electronic tag according to claim 1, characterized in that: The thickness of the short-circuit ring and the antenna arm ranges from 18 μm to 50 μm.

9. The flexible RFID electronic tag according to claim 1, characterized in that: The short-circuit ring is formed on the hard substrate by etching or printing; the antenna arm is formed on the flexible substrate by etching or printing.

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