Radio frequency identification tag with anti-metal film layer

Abstract

The utility model provides a radio frequency identification tag with an anti-metal film layer. The radio frequency identification tag comprises an antenna, a first adhesive layer and the anti-metal film layer. The antenna comprises a substrate, a metal layer and a chip. The metal layer is located on the first surface of the substrate. The metal layer is provided with a first slot, a second slot and a third slot which are through. The chip is located in the chip setting area. The anti-metal film layer is attached to the antenna through the first adhesive layer. Therefore, the effect of thinning the radio frequency identification tag is achieved, the reading efficiency of the radio frequency identification tag is improved, and the readable distance of the radio frequency identification tag is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wireless radio frequency identification label, in particular to a wireless radio frequency identification label with an anti-metal film layer. BACKGROUND

[0002] Radio frequency identification (RFID) is commonly used in life. Radio frequency identification is a wireless communication technology that can identify specific targets and read and write data through radio signals without establishing mechanical or optical contact between the identification system and the target. Radio frequency identification has a wide range of applications, such as in the technical fields of access control, medical record reading and writing, animal identification, logistics, and electronic toll collection management.

[0003] Existing wireless radio frequency tags are often used on metal objects. Since metal has strong reflectivity to electromagnetic waves, the signal may be weakened, and reading obstacles may occur due to the blocking of metal objects, resulting in reading failure.

[0004] Therefore, how to improve the anti-metal capability of wireless radio frequency tags and increase the readable distance through structural design improvement has become one of the important issues to be solved in this technical field. SUMMARY

[0005] To solve the above technical problems, the utility model provides a wireless radio frequency identification label with an anti-metal film layer, which comprises an antenna, a first adhesive layer and an anti-metal film layer. The antenna comprises a substrate, a metal layer and a chip. The substrate has a first surface and an opposite second surface. Two adjacent edges of the metal layer define a first edge and a second edge, respectively. The metal layer is located on the first surface of the substrate. The metal layer is provided with a first slot, a second slot and a third slot. The first slot and the second slot are adjacent to the first edge and extend along a first direction parallel to the first edge, respectively. The first slot and the second slot are opposite to each other and define a chip setting area. The third slot comprises a long and narrow part and an extension part. The long and narrow part extends along the first direction and is connected to the second edge at one end and to the extension part at the other end. The extension part extends towards the first edge along a second direction perpendicular to the first edge. The chip is located in the chip setting area. The first adhesive layer is located on the second surface of the substrate. The anti-metal film layer is attached to the antenna through the first adhesive layer.

[0006] In a feasible implementation, the wireless radio frequency identification label with an anti-metal film layer further comprises a second adhesive layer disposed on the anti-metal film layer.

[0007] In a feasible implementation, the wireless radio frequency identification label with an anti-metal film layer further comprises a release layer disposed on the second adhesive layer.

[0008] In an embodiment, the wireless radio frequency identification tag with the anti-metal film layer further comprises a protective layer covering the antenna.

[0009] In an embodiment, the protective layer is attached to the antenna via a third adhesive layer.

[0010] In an embodiment, in the first direction, the length of the third slot is substantially equal to the sum of the length of the first slot, the length of the chip setting area, and the length of the second slot.

[0011] In an embodiment, the protective layer is a copper plate paper.

[0012] In an embodiment, the total thickness of the antenna, the first adhesive layer, and the anti-metal film layer is 0.5-1.0 mm.

[0013] One of the beneficial effects of the present application is that the wireless radio frequency identification tag with the anti-metal film layer can reduce and lower the situation of signal reflection on the metal surface, strengthen the signal, and increase the readable distance of the wireless radio frequency identification tag through the technical solutions of "the first adhesive layer being located on the second surface of the substrate" and "the anti-metal film layer being attached to the antenna via the first adhesive layer".

[0014] Further, the wireless radio frequency identification tag with the anti-metal film layer can thin the wireless radio frequency identification tag, improve the reading efficiency of the wireless radio frequency identification tag, and increase the readable distance of the wireless radio frequency identification tag through the design of "the chip, the first slot, the second slot, and the third slot of the antenna" and the setting of "the anti-metal film layer".

[0015] To further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the drawings provided are only for reference and illustration, and are not used to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a sectional view of the wireless radio frequency identification tag with the anti-metal film layer according to an embodiment of the present application.

[0017] Figure 2 FIG. 2 is a top view of the antenna according to an embodiment of the present application.

[0018] Figure 3 FIG. 3 is a start tag power graph of the wireless radio frequency identification tag with the anti-metal film layer according to an embodiment of the present application.

[0019] Figure 4 FIG. 4 is a field pattern graph of the wireless radio frequency identification tag with the anti-metal film layer according to an embodiment of the present application at 915 MHz. Z ​ Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the "Radio Frequency Identification Tag with Anti-Metallic Film Layer" disclosed in this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0021] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0022] Please see Figures 1 to 2 , Figure 1 This is a cross-sectional schematic diagram of a radio frequency identification tag Z with an anti-metal film layer according to an embodiment of the present invention. Figure 2 This is a top view of antenna 1 according to an embodiment of the present invention, omitting the protective layer 7 and the third adhesive layer 71.

[0023] like Figure 1 As shown, a radio frequency identification (RFID) tag Z with an anti-metal film layer includes an antenna 1, a first adhesive layer 2, and an anti-metal film layer 3. The antenna 1 includes a substrate 11, a metal layer 12, and a chip. The substrate 11 is made of, for example, polyethylene terephthalate (PET) with a thickness of approximately 10 μm. The metal layer 12 is, for example, copper foil or aluminum foil with a thickness of approximately 50 μm. The chip 13 is a semiconductor chip. The first adhesive layer 2 is adhesive and can attach the anti-metal film layer 3 to the antenna 1. The anti-metal film layer 3 is a wave-absorbing material. Since RFID tags are often used in metallic environments, and metal has strong reflectivity to electromagnetic waves, signal attenuation and a shorter reading distance are caused, and severe crosstalk can lead to reading failures. By providing the anti-metal film layer 3, the aforementioned problems can be solved. In one embodiment, the thickness of the anti-metal film layer 3 is approximately 400 μm.

[0024] The substrate 11 has a first surface 111 and an opposite second surface 112. The metal layer 12 has a first periphery 121 and a second periphery 122 defined by two adjacent peripheries of the metal layer 12, and the metal layer 12 is disposed on the first surface 111 of the substrate 11. The metal layer 12 has a first slot 41, a second slot 42 and a third slot 43, as shown in Figure 2 The first slot 41 and the second slot 42 are adjacent to the first periphery 121 and extend along a first direction D1 parallel to the first periphery 121, and the first slot 41 and the second slot 42 are opposite to define a chip setting area 123. In other words, the chip setting area 123 is between the first slot 41 and the second slot 42. The third slot 43 includes a long part 431 and an extension part 432. The long part 431 extends along the first direction D1 and has one end connected to the second periphery 122 and the other end connected to the extension part 432. The extension part 432 extends toward the first periphery 121 along a second direction D2 orthogonal to the first periphery 121. The chip 13 is disposed in the chip setting area 123. The first adhesive layer 2 is disposed on the second surface 112 of the substrate 11. The metal film layer 3 is attached to the antenna 1 through the first adhesive layer 2.

[0025] In the embodiment shown in Figure 1 In the embodiment shown in

[0026] In some embodiments, the thickness T of the wireless radio frequency identification tag Z with the metal-resistant film layer is about 0.5-1.0 mm. In some embodiments, the thickness T of the wireless radio frequency identification tag Z with the metal-resistant film layer is about 0.6 mm. In some embodiments, the effective reading distance of the wireless radio frequency identification tag Z with the metal-resistant film layer can reach 1.5-2.0 m. In some embodiments, the effective reading distance can reach 1.7 m.

[0027] According to the embodiment shown in Figure 1 The wireless radio frequency identification tag Z with the metal-resistant film layer further includes a second adhesive layer 5 disposed on the metal film layer 3. By providing the second adhesive layer 5, the antenna 1 and the metal film layer can be attached to the surface of any object, especially the surface of metal. In addition, in some embodiments, the wireless radio frequency identification tag Z with the metal-resistant film layer further includes a release layer 6 disposed on the second adhesive layer 5. The user can hold the wireless radio frequency identification tag Z with the metal-resistant film layer, tear the release layer 6 (so that the second adhesive layer 5 is separated from the release layer 6), and then attach the wireless radio frequency identification tag Z with the metal-resistant film layer to the surface of the desired object. In some embodiments, the thickness of the release layer 6 is about 60 μm.

[0028] According to the embodiment shown in Figure 1In the shown embodiment, the wireless radio frequency identification tag Z with the anti-metal film layer further comprises a protective layer 7 covering the antenna 1. In some embodiments, the protective layer 7 is attached to the antenna 1 via a third adhesive layer 71. By providing the protective layer 7, the antenna 1 can be protected from being exposed and the service life of the antenna 1 can be prolonged. In some embodiments, the protective layer 7 is copper plate paper. In one embodiment, the thickness of the protective layer 7 is 80 μm.

[0029] Please refer to Figure 3 and Figure 4 , Figure 3 the starting tag power diagram of the wireless radio frequency identification tag with the anti-metal film layer according to one embodiment of the present application. Figure 4 the field pattern diagram (unit: dBm) of the wireless radio frequency identification tag with the anti-metal film layer according to one embodiment of the present application at 915 MHz. Z

[0030] "beneficial effects of the embodiments"

[0031] One beneficial effect of the present application is that the wireless radio frequency identification tag with the anti-metal film layer can reduce, lower the situation of signal reflection on the metal surface, strengthen the signal and increase the readable distance of the wireless radio frequency identification tag by the technical solutions of "the first adhesive layer is located on the second surface of the substrate" and "the anti-metal film layer is attached to the antenna via the first adhesive layer".

[0032] Further, the wireless radio frequency identification tag with the anti-metal film layer can be thinned, the reading efficiency of the wireless radio frequency identification tag can be improved and the readable distance of the wireless radio frequency identification tag can be increased by the design of "the chip, the first slot, the second slot and the third slot of the antenna" and the setting of "the anti-metal film layer".

[0033] The above disclosed content is only the preferred feasible embodiments of the present application, and does not limit the protection scope of the claims of the present application, so that any equivalent technical changes made according to the content of the present application and the drawings are included in the protection scope of the claims of the present application.​

Claims

1. A wireless radio frequency identification tag having an anti-metallic film layer, characterized by, The wireless radio frequency identification tag with an anti-metal film layer comprises: an antenna comprising: a substrate having a first surface and an opposite second surface; a metal layer adjacent to two peripheries defining a first periphery and a second periphery, respectively, the metal layer being located on the first surface of the substrate, the metal layer being provided with a first slot, a second slot and a third slot, respectively, the first slot and the second slot being adjacent to the first periphery and extending along a first direction parallel to the first periphery, the first slot and the second slot being opposite to each other and defining a chip setting area, the third slot comprising a long part and an extension part, the long part extending along the first direction, one end of the long part being connected to the second periphery and the other end of the long part being connected to the extension part, the extension part extending towards the first periphery along a second direction orthogonal to the first periphery; and a chip located in the chip setting area; a first adhesive layer located on the second surface of the substrate; and an anti-metal film layer attached to the antenna through the first adhesive layer.

2. The wireless radio frequency identification tag having an anti-metal film layer according to claim 1, characterized by, The wireless radio frequency identification tag with an anti-metal film layer further comprises a second adhesive layer arranged on the anti-metal film layer.

3. The wireless radio frequency identification tag having an anti-metal film layer according to claim 2, characterized by, The wireless radio frequency identification tag with an anti-metal film layer further comprises a release layer arranged on the second adhesive layer.

4. The wireless radio frequency identification tag having an anti-metal film layer according to claim 1, characterized by, The wireless radio frequency identification tag with an anti-metal film layer further comprises a protective layer covering the antenna.

5. The wireless radio frequency identification tag having an anti-metal film layer according to claim 4, characterized by, The protective layer is attached to the antenna through a third adhesive layer.

6. The wireless radio frequency identification tag having an anti-metal film layer according to claim 1, wherein, In the first direction, the length of the third slot is substantially equal to the sum of the length of the first slot, the length of the chip setting area and the length of the second slot.

7. The wireless radio frequency identification tag having an anti-metal film layer according to claim 4, characterized by, The protective layer is a copper plate paper.

8. The wireless radio frequency identification tag having an anti-metal film layer according to claim 1, wherein, The total thickness of the antenna, the first adhesive layer and the anti-metal film layer is 0.5-1.0 mm.

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