RFID label with robust chip protection

Abstract

An RFID label comprising a carrier layer comprising an antenna, the antenna preferably being laminated on the carrier layer; an RFID chip, preferably disposed over the antenna; and a continuous cushion layer disposed over the antenna and defining an aperture at least partially surrounding the RFID chip. The aperture is configured spaced from the RFID chip. The cushion layer provides damping of mechanical forces applied to the RFID label, preferably from mechanical stress.

Description

Atty. Docket No. 7775-WORFID Label with Robust Chip ProtectionCross-Reference to Related Application(s)

[0001] The present application claims priority to U. S. Provisional Patent Application No.63 / 721,056 filed November 15, 2024, which is incorporated by reference herein in its entirety.Field

[0002] The present disclosure relates to an RFID label. In particular, the disclosure relates to a robust RFID label comprising an RFID chip and a protective strap that acts as a mechanical stress damper to protect the RFID chip.Background

[0003] Conventional RFID labels comprise, inter alia, a carrier, an RFID chip, and an antenna structure. In these RFID labels, the RFID chip and its connection to the antenna are those points that react most sensitively to mechanical stresses. During the processing of RFID labels, pressure is often exerted on these points, e.g., by deflecting and pressing rolls of a processing machine.

[0004] When the RFID label is attached, after its manufacture, to the body to be labeled, the risk exists that the transponder chip will be damaged by mechanical force action or that the connection between the antenna structure and the transponder chip will be broken due to mechanical stress. In some cases, the adhesive that comprises the bonding material between the chip and the antenna structure is prone to breakage. This is especially common in cases where the RFID label is designed as a wraparound label and is pasted onto a vessel, for example a cylindrical container. The RFID transponder chip or the connection to the antenna structure may be damaged due to the contact of vessels rubbing directly against one another.

[0005] in some cases, the electronic functionality of an RFID label is protected by providing a protective coating in the form of a lacquer (lacquer dome) directly on the transponder chip. However, such a lacquer dome often offers only inadequate protection for the chip, since only a small part of the mechanical stress is dissipated and the additional stiffening is disadvantageous on curved surfaces. Furthermore, this technique requires additional processing, which is costly.

[0005] US Patent No. 10,599,967 discloses an RFID label with protection of the RFID function that includes an RFID transponder chip and a carrier substrate, on which the RFID transponder chip is disposed. At least one structure element in vertical projection is disposed laterally offset from the RFID transponder chip. The at least one structure element acts as a spacer and, in case of an external mechanical stress, prevents a direct force action on the transponder chip and a junction to an attached antenna structure.

[0007] Even in view of the existing references, the need exists for an uncomplicated, RFID label that provides protection for the RFID chip along with easy processing and cost effectiveness.Summary

[0008] The disclosure relates to an RFID label, comprising a carrier layer comprising an antenna (optionally comprising a metallic area), the antenna preferably being laminated on the carrier layer; an RFID chip, preferably disposed over the antenna; and a continuous (single structure) cushion layer disposed over the antenna (the cushion layer optionally covering some of the metallic area and optionally some of the carrier layer) and defining an aperture at least partially surrounding the RFID chip, e.g., surrounding the RFID chip; wherein the aperture is configured spaced from the RFID chip; and wherein the cushion layer provides damping of mechanical forces applied to the RFID label, preferably from mechanical stress. The RFID label may further comprise a vacuum assistance layer having a thickness, e.g., ranging from 0.001 mm to 2 mm, and disposed over the aperture. The cushion layer may comprise paper and the vacuum assistance layer may comprise polyethylene terephthalate. The cushion layer is not printed onto the carrier layer or onto another layer and / or it may be disposed on to the carrier via a label insertion process and / or it may comprise a polyolefin material and / or paper, preferably polyethylene terephthalate. The cushion layer may have a thickness, e.g., ranging from 0.01 mm to 1 mm, and the RFID chip may have a thickness, e.g., ranging from 0.001 mm to 1 mm, and the ratio of cushion layer thickness to RFID chip thickness ranges from 0.5 to 5, preferably from 1 to 2. The cushion layer may have a circular perimeter shape and may define the aperture inside of the circular perimeter. The cushion layer may comprise a strap structure having a perimeter, preferably a rectangular perimeter, and may define the aperture inside of the strap perimeter. The aperture may have a dimension ranging from 2 mm to 22 mm, preferably from 8 mm to 15 mm.Brief Description of the Drawings

[0009] A further understanding of the nature and advantages of the disclosed technology may be realized by reference to the remaining portions of the specification and the drawings.

[0010] Fig. 1 shows a perspective view of an embodiment of an RFID label as disclosed herein.

[0011] Fig. 2 shows a perspective view of an embodiment of an RFID label with a cut-away of the RFID chip and continuous cushion layer as disclosed herein.

[0012] Fig. 3 shows a cross-section of an embodiment of an RFID label as disclosed herein.Detailed DescriptionIntroduction

[0013] As noted above, the conventional RFID labels struggle with the problems relating to mechanical forces and stresses during production and in use. Attempts to deal with these problems include the use of coatings (a lacquer dome) spacer that are intended to absorb mechanical stress. However, these proposed solutions offer inadequate protection to the RFID chip, which results in defective labels. Further, the use of some conventional coatings and or lacquer spacers often require additional processing steps, which, detrimentally, add complexity and cost to the label, especially in the case of lacquer domes or beads / dots of varnish or cured resin materials.

[0014] it has now been found that the use of a specific cushion layer (as disclosed herein ) provides for unexpected improvements in protection from mechanical stress and, advantageously, offers solutions to process-related problems associated with conventional labels, e.g., extra complicated, costly process steps.

[0015] Without being bound by theory, the use of the disclosed continuous cushion layer, e.g., continuous layer of olefin and / or paper, is believed to better absorb and distribute mechanical stress more evenly, 'which results in less overall impact on the entire chip. In contrast the spacers or domes of conventional labels localize the stresses, which creates deleterious pressure points on the RFID chip.

[0016] Further, the disclosed antenna-chip structure provides for additional production efficiencies, for example, the (flexible) antenna may be laminated onto the carrier, 'which beneficially results in a complete antenna-chip inlay that is ready for use. in contrast, conventional RFID labels require additional processing, e.g., work done by converters, to achieve a similar result. Stated another way, the disclosed antenna-chip inlay is ready for use, as is, without further conversion. The production benefits of the disclosed RFID label make it easier to integrate into current manufacturing setups, which may reduce adoption barriers and accelerate market penetration. All or some of these advantages will likely provide a competitive edge in terms of pricing and scalability.

[0017] In addition, the use of the disclosed vacuum assistance layer has been found to provide further processing efficiencies. For example, the vacuum assistance layer allows ease of processing andthe use of some tooling during formation of the RFID label. As one example, the vacuum assistance layer beneficially prohibits vacuum leakage during processing. In conventional operations, the positioning of the vacuum tooling with respect to apertures, along with the absence of a vacuum assistance layer, is known to create deleterious leakage of vacuum, which interferes with processing.RFID Label Structure

[0018] The disclosure relates to an RFID label comprising a carrier layer, an RFID chip, and a continuous cushion layer. The carrier layer comprises an antenna, which, in some cases, may be laminated on the carrier layer. The RFID chip may be disposed over the antenna e.g., atop the antenna (although other configurations are contemplated, e.g., where the RFID chip is disposed near the antenna or adjacent the antenna. The continuous cushion layer is also disposed over the antenna. The continuous cushion layer defines and an aperture. The aperture configured to be at least partially spaced from the RFID chip and to at least partially surround the RFID chip. With this configuration, the cushion layer advantageously provides damping of mechanical forces / stresses that may be applied to the RFID label.Continuous Cushion Layer

[0019] The continuous cushion layer at least partially surrounds the RFID chip. In some embodiments, the RFID chip is disposed (at least partially) within the aperture of the continuous cushion layer. In some cases, the continuous cushion layer completely surrounds the RFID chip. That is to say, the RFID chip is disposed entirely within the aperture of the continuous cushion layer. In some cases, the continuous cushion layer may surround only a portion of the RFID chip. That is to say, some of the RFID chip may not be wholly encompassed by the aperture of the continuous cushion layer. With these configurations, the continuous cushion layer provides for unexpected improvements in absorption and distribution of mechanical stresses.

[0020] Generally, the continuous cushion layer serves to absorb and distribute mechanical stress, and its disclosed configuration has been found to unexpectedly outperform conventional domes, spacers, or dots. The composition of the continuous cushion layer may vary widely, as long as this goal is achieved. In some cases, the continuous cushion layer comprises a polyolefin material and / or paper. In some cases, the continuous cushion layer comprises polyethylene terephthalate (PET), polyurethane (PU), or polyvinylchloride (PVC), or combinations thereof. In some embodiments the continuous cushion layer comprises polyethylene terephthalate.

[0021] In some embodiments, the continuous cushion layer may be in the form of a protective strap. In some cases, the continuous cushion layer generally (the strap) may be disposed on to the carrier layer using a label insertion process. In some cases, the cushion layer comprises a strap structure havinga perimeter, preferably a rectangular perimeter. This perimeter may define the aperture, e.g., inside of the strap perimeter. In some case, the cushion layer has a circular perimeter shape. This perimeter defines the aperture, e.g., inside of the circular perimeter. The aperture, rectangular, circular, or otherwise, may surround the RFID chip, as discussed herein.

[0022] In some embodiments, the aperture has a dimension. The dimension may, for example, be a length or a width or a diameter. In some cases, for example where the aperture is a less defined shape, the dimension may be the distance between two points on the perimeter that is the greatest possible distance. In some embodiments, the dimension ranges from 1 mm to 22 mm, e.g., from 4 mm to 20 mm, from 6 mm to 18 mm, from 8 mm to 15 mm, or from 10 mm to 13 mm. In terms of lower limits, the dimension may be greater than 2 mm, e.g., greater than 4 mm, greater than 6 mm, greater than 8 mm, greater than 10 mm, or greater than 12 mm. In terms of upper limits, the dimension may be less than 22 mm, e.g., less than 20 mm, less than 18 mm, less than 16 mm, less than 15 mm, less than 14 mm, less than 13 mm, or less than 12 mm.

[0023] The continuous cushion layer has a thickness. Importantly, the relationship thickness of the cushion layer and the thickness of the RFID chip has been found to contribute to the aforementioned performance benefits. In some embodiments, the ratio of continuous cushion layer thickness to RFID chip thickness ranges from 0.5 to 5, e.g., from 0.75 to 4, from 0.85 to 3, from 1.2 to 3, from 1 to 2, from 1.25 to 1.75, or from 1.35 to 1.65. In terms of lower limits, the ratio of continuous cushion layer thickness to RFID chip thickness may be greater than 0.5, e.g., greater than 0.75, greater than 0.85, greater than 1, greater than 1.25, or greater than 1.35. In terms of upper limits, the ratio of continuous cushion layer thickness to RFID chip thickness may be less than 5, e.g., less than 4, less than 3, less than 2, less than 1.75, or less than 1.65.

[0024] In some embodiments, the continuous cushion layer thickness ranges from 0.01 mm to 1 mm, e.g., from 0.05 mm to 0.5 mm, from 0.07 mm to 0.4 mm, from 0.09 mm to 0.3 mm, from 0.11 mm to 0.24 mm, or from 0.13 mm to 0.2 mm. In terms of lower limits, the continuous cushion layer thickness may be greater than 0.01 mm, e.g., greater than 0.05 mm, greater than 0.07 mm, greater than 0.09 mm, greater than 0.11 mm, or greater than 0.13 mm. In terms of upper limits, the continuous cushion layer thickness may be less than 1 mm, e.g., less than 0.5 mm, less than 0.4 mm, less than 0.3 mm, less than 0.25 mm, less than 0.24 mm, or less than 0.2 mm.

[0025] In some embodiments, the RFID chip thickness ranges from 0.001 mm to 1 mm, e.g., from 0.005 mm to 0.5 mm, from 0.01 mm to 0.4 mm, from 0.03 mm to 0.3 mm, from 0.05 mm to 0.3 mm, from 0.05 to 0.24, from 0.07 mm to 0.2 mm, or from 0.09 mm to 0.12 mm. In terms of lower limits, the RFIDchip thickness may be greater than 0.001 mm, e.g., greater than 0.005 mm, greater than 0.01 mm, greater than 0.03 mm, greater than 0.05 mm, greater than 0.07 mm or greater than 0.09 mm. In terms of upper limits, the RFID chip thickness may be less than 1 mm, e.g., less than 0.5 mm, less than 0.4 mm, less than 0.3 mm, less than 0.24, less than 0.2 mm, less than 0.15 mm, or less than 0.12 mm.

[0026] Importantly, in some cases, the continuous cushion layer is not printed, e.g., not printed onto the carrier layer or onto any other layers. The continuous cushion layer, in some embodiments, is a single (continuous) structure. That is to say, the continuous cushion layer does not comprise multiple individual printed structural elements or dots, which provides for the aforementioned performance benefits. Because the continuous cushion layer need not be printed and / or because it is a single structure rather than a collection of spacers, production efficiencies are achieved, e.g., complex printing operations are reduced or eliminated, which contributes to production simplicity and cost-effectiveness.Carrier Layer with Antenna

[0027] As noted above, the RFID label comprises the carrier layer, and the carrier layer comprises the antenna. The composition of the carrier layer may vary widely, in some cases, the carrier layer comprises polyolefin, polyimide (PI), or cellulosic material, or combinations thereof. In some cases, the carrier layer comprises PET, PI, or paper, or combinations thereof.

[0028] In some cases, the antenna is laminated to / on the carrier layer. As such, the disclosed configuration provides a distinct advantage in applications where lamination is crucial to the label. The lamination may be achieved by suitable means, in some cases, the lamination is achieved by using an adhesive or resin. Exemplary resins include epoxies, urethane, acrylics, or silicones, or combinations thereof.

[0029] in some embodiments, the antenna is in communication with, e.g., attached to, the RFID chip. In some cases, the RFID chip and the antenna structure are connected to one another and are disposed on the carrier layer to form an RFID inlay. The RFID chip, in some cases, may be adjacent the antenna, e.g., inside the perimeter of a circular-shaped antenna. In some cases, the RFID chip (or a portion thereof) may sit atop the antenna.

[0030] The antenna type may vary widely, and many types of antennae are known. For example, the antenna may be UHF, NFC, or HF. The geometry and form of the antenna may also vary widely. Examples of antennae include linear, circular, dipole, wide slot, nested slot, or coils.

[0031] I n some cases, the antenna comprises a metallic area. In the RFID label, the continuous cushion layer may be disposed over (may cover) some of the metallic area. In some cases, the continuous cushion layer may cover some of the metallic area and some of the carrier layer.Vacuum Assistance Layer

[0032] The RFID label comprises a vacuum assistance layer. The vacuum assistance layer may be disposed over the aperture (and optionally over the RFID chip and / or over the continuous cushion layer. The vacuum assistance layer advantageously provides ease of processing of the RFID label. For example, the vacuum assistance layer allows a vacuum to be drawn on the RFID label during production which, in turn, allows the continuous cushion layer and the carrier layer (and the RFID chip) to be formed into the RFID label. With the vacuum assistance layer, simpler tooling may be employed to produce the RFID label. Without the vacuum assistance layer, such tooling would struggle to pick-up the protective slot because the vacuum hole may align with a portion of the aperture, which causes vacuum leakage.

[0033] The composition of the vacuum assistance layer may vary widely, as long as this goal is achieved. In some cases, the continuous cushion layer comprises a polyolefin material. In some cases, the continuous cushion layer comprises PET, PVC, PU, or paper, or combinations thereof. In some embodiments, the continuous cushion layer comprises PET. In some cases, the cushion layer comprises paper and the vacuum assistance layer comprises polyethylene terephthalate.

[0034] The vacuum assistance layer has a thickness. The vacuum assistance layer thickness ranges from 0.001 mm to 2 mm, e.g., from 0.005 mm to 1.5 mm, from 0.005 mm to 0.5 mm, from 0.005 mm to 0.1 mm, from 0.005 mm to 0.05 mm, from 0.007 mm to 0.05 mm, or from 0.01 mm to 0.02 mm. In terms of lower limits, the vacuum assistance layer thickness may be greater than 0.001 mm, e.g., greater than 0.005 mm, greater than 0.007 mm, greater than 0.01 mm, greater than 0.012 mm, or greater than 0.015 mm. In terms of upper limits, the vacuum assistance layer thickness may be less than 2 mm, e.g., less than 1 mm, less than 0.5 mm, less than 0.2 mm, less than 0.1 mm, less than 0.08 mm, less than 0.05 mm, less than 0.03 mm, or less than 0.02 mm.Additional Layers

[0035] The RFID label may comprise other (optional layers), e.g., foil layer(s), adhesive layer(s), backing layer(s), face layer(s), etc. In some cases, the face layer comprises paper, PET, PI, or PU, or combinations thereof. Face materials may further comprise adhesive and may be directly laminated to the antenna.

[0036] For example, a foil layer may be disposed above / atop the carrier layer or the RFID or the RFID chip-antenna inlay.

[0037] Turning to the Figures,. Fig. 1 shows RFID label 100,. as disclosed herein. RFiD label 100 comprises carrier layer 102, which has antenna 104 laminated thereon. RFID chip 106 sits atop antenna104. Continuous cushion layer 108 surrounds RFID chip 106. in the embodiment of Fig. 1, continuous cushion layer has circular perimeter and a "donut" shape.

[0038] Fig. 2 shows RFID label 200 with a cut-away of RFID chip 206 and continuous cushion layer 208. In the embodiment of Fig. 2, continuous cushion layer 208 is in the form of a protective strap, which surrounds RFID chip 206.

[0039] Fig. 3 shows a cross section of RFID label 300. RFID label 300 comprises carrier layer 302, which has antenna 304 laminated thereon. RFID chip 306 sits atop antenna 304 and has RFID chip thickness 307. Continuous cushion layer 308 surrounds RFID chip 306 and has continuous cushion layer thickness 309. Vacuum assistance layer 310 is disposed over continuous cushion layer 308 and RFID chip 306. Vacuum assistance layer 310 has vacuum assistance layer thickness 312.

[0040] Numerical values in the specification and claims of this application should be understood to include numerical values which are the same when reduced to the same number of significant figures and numerical values which differ from the stated value by less than the experimental error of conventional measurement technique of the type described in the present application to determine the value.

[0041] All ranges disclosed herein are inclusive of the recited endpoint and independently combinable (for example, the range of "from 2 grams to 10 grams" is inclusive of the endpoints, 2 grams or 10 grams, and all the intermediate values).

[0042] As used herein, "greater than" and "less than" limits may also include the number associated therewith. Stated another way, "greater than" and "less than" may be interpreted as "greater than or equal to" and "less than or equal to." It is contemplated that this language may be subsequently modified in the claims to include "or equal to." For example, "greater than 4.0" may be interpreted as, and subsequently modified in the claims as "greater than or equal to 4.0."

[0043] Some of the components and steps disclosed herein may be considered optional. In some cases, the disclosed compositions, processes, etc. may expressly exclude one or more of the aforementioned components or steps in this description, e.g., via claim language. This is contemplated herein by the inventors. For example, claim language may be modified to recite that the disclosed labels do not utilize or comprise one or more of the aforementioned components or steps, e.g., a foil layer. Such negative limitations are contemplated, and this text serves as support for negative limitations for components, steps, and / or features.

[0044] The term "about" can be used to include any numerical value that can vary without changing the basic function of that value. When used with a range, "about" also discloses the rangedefined by the absolute values of the two endpoints, e.g., "about 2 to about 4" also discloses the range "from 2 to 4." The term "about" may refer to plus or minus 10% of the indicated number.Embodiments

[0045] The following embodiments are contemplated. All combinations of features and embodiments are contemplated.

[0046] Embodiment 1: An RFID label, comprising a carrier layer comprising an antenna, the antenna preferably being laminated on the carrier layer; an RFID chip, preferably disposed over the antenna; and a continuous cushion layer disposed over the antenna and defining an aperture at least partially surrounding the RFID chip; wherein the aperture is configured spaced from the RFID chip; and wherein the cushion layer provides damping of mechanical forces applied to the RFID label, preferably from mechanical stress.

[0047] Embodiment 2: an embodiment of Embodiment 1, wherein the cushion layer is not printed onto the carrier layer or onto another layer.

[0048] Embodiment 3: an embodiment of Embodiments 1 or 2, wherein the antenna comprises a metallic area and wherein the cushion layer covers some of the metallic area and optionally some of the carrier layer.

[0049] Embodiment 4: an embodiment of Embodiments 1 - 3 wherein the cushion layer is disposed on to the carrier via a label insertion process.

[0050] Embodiment 5: an embodiment of Embodiments 1-4 wherein the cushion layer is a single structure.

[0051] Embodiment 6: an embodiment of Embodiments 1 - 5 wherein the cushion layer comprises a polyolefin material and / or paper, preferably polyethylene terephthalate.

[0052] Embodiment 7: an embodiment of Embodiments 1 - 6 wherein the cushion layer has a circular perimeter shape and defines the aperture inside of the circular perimeter, and wherein the aperture surrounds the RFID chip.

[0053] Embodiment 8: an embodiment of Embodiments 1 - 7 wherein the cushion layer comprises a strap structure having a perimeter, preferably a rectangular perimeter, and defining the aperture inside of the strap perimeter.

[0054] Embodiment 9: an embodiment of Embodiments 1 - 8 wherein the aperture has a dimension ranging from 2 mm to 22 mm, preferably from 8 mm to 15 mm.

[0055] Embodiment 10: an embodiment of Embodiments 1 - 9 further comprising a vacuum assistance layer disposed over the aperture.

[0056] Embodiment 11: an embodiment of Embodiments 1 - 10 wherein the cushion layer has a thickness and the RFID chip has a thickness and the ratio of cushion layer thickness to RFID chip thickness ranges from 0.5 to 5, preferably from 1 to 2.

[0057] Embodiment 12: an embodiment of Embodiments 1 - 11 wherein the cushion layer thickness ranges from 0.01 mm to 1 mm.

[0058] Embodiment 13: an embodiment of Embodiments 1 - 12 wherein the RFID chip thickness ranges from 0.001 mm to 1 mm.

[0059] Embodiment 14: an embodiment of Embodiments 1 - 13 wherein the vacuum assistance layer has a thickness ranging from 0.001 mm to 2 mm.

[0060] Embodiment 15: an embodiment of Embodiments 1 - 14 wherein the cushion layer comprises paper and the vacuum assistance layer comprises polyethylene terephthalate.

[0061] While the invention has been described in detail, modifications within the spirit and scope of the invention will be readily apparent to those of skill in the art. In view of the foregoing discussion, relevant knowledge in the art and references discussed above in connection with the Background and Detailed Description, the disclosures of which are all incorporated herein by reference. In addition, it should be understood that aspects of the invention and portions of various embodiments and various features recited below and / or in the appended claims may be combined or interchanged either in whole or in part. In the foregoing descriptions of the various embodiments, those embodiments which refer to another embodiment may be appropriately combined with other embodiments as will be appreciated by one of skill in the art. Furthermore, those of ordinary skill in the art will appreciate that the foregoing description is by way of example only, and is not intended to limit.

Claims

ClaimsWe claim:

1. An RFID label, comprising:a carrier layer comprising an antenna, the antenna preferably being laminated on the carrier layer; an RFID chip, preferably disposed over the antenna; anda continuous cushion layer disposed over the antenna and defining an aperture at least partially surrounding the RFID chip;wherein the aperture is configured spaced from the RFID chip; andwherein the cushion layer provides damping of mechanical forces applied to the RFID label, preferably from mechanical stress.

2. The RFID label of claim 1, wherein the cushion layer is not printed onto the carrier layer or onto another layer.

3. The RFID label of any of the preceding claims, wherein the antenna comprises a metallic area and wherein the cushion layer covers some of the metallic area and optionally some of the carrier layer.

4. The RFID label of any of the preceding claims, wherein the cushion layer is disposed on to the carrier via a label insertion process.

5. The RFID label of any of the preceding claims, wherein the cushion layer is a single structure.

6. The RFID label of any of the preceding claims, wherein the cushion layer comprises a polyolefin material and / or paper, preferably polyethylene terephthalate.

7. The RFID label of any of the preceding claims, wherein the cushion layer has a circular perimeter shape and defines the aperture inside of the circular perimeter, and wherein the aperture surrounds the RFID chip.

8. The RFID label of any of the preceding claims, wherein the cushion layer comprises a strap structure having a perimeter, preferably a rectangular perimeter, and defining the aperture inside of the strap perimeter.

9. The RFID label of any of the preceding claims, wherein the aperture has a dimension ranging from 2 mm to 22 mm, preferably from 8 mm to 15 mm.

10. The RFID label of any of the preceding claims, further comprising a vacuum assistance layer disposed over the aperture.

11. The RFID label of any of the preceding claims, wherein the cushion layer has a thickness and the RFID chip has a thickness and the ratio of cushion layer thickness to RFID chip thickness ranges from 0.5 to 5, preferably from 1 to 2.

12. The RFID label of any of the preceding claims, wherein the cushion layer thickness ranges from 0.01 mm to 1 mm.

13. The RFID label of any of the preceding claims, wherein the RFID chip thickness ranges from 0.001 mm to 1 mm.

14. The RFID label of any of the preceding claims, wherein the vacuum assistance layer has a thickness ranging from 0.001 mm to 2 mm.

15. The RFID label of any of the preceding claims, wherein the cushion layer comprises paper and the vacuum assistance layer comprises polyethylene terephthalate.

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