RFID tag and method capable of preventing chip reuse

Abstract

The present invention relates to an RFID tag capable of preventing chip reuse, comprising a chip, an antenna, and anisotropic conductive glue, wherein the conductive glue is arranged between the chip and the antenna, and further comprising: an insulating layer that can be dissolved by an organic solvent, wherein the chip contacts including the status contacts and the radio frequency contacts are connected to the antenna through the conductive glue, and a part of the status contacts is covered with an insulating layer; the chip detects the connection state of the status contacts, and when the connection state changes, the chip stops working normally. The present invention achieves the effect of stopping the normal operation of the chip when it is re-bound through structural design, ensures the one-time use of the chip, and achieves the effects of traceability and anti-counterfeiting.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency identification, and in particular to an RFID tag and method capable of preventing chip reuse. Background Art

[0002] With the popularity of smart phones, NFC modules have become standard equipment for most mobile phones, and RFID has been accepted by more and more people, which is convenient and quick to use. RFID technology can be read by NFC modules and is widely used in food traceability and anti-counterfeiting, especially for high value-added products. It is the foundation of the Internet of Things. Manufacturers use this technology to trace the source of products; consumers use this technology to conduct anti-counterfeiting queries and authenticity verification. In order to ensure the stability and reliability of RFID tags during production, transportation, and circulation, RFID tags (including chips) are also required to have certain resistance to external forces and weather resistance.

[0003] High value-added products are also the main target of counterfeiters. Although we have used the highest level of RFID anti-counterfeiting technology, some counterfeiters still take risks and manually re-bind the recovered chips and use them on fake wine. The chip is small in size, with the smallest less than 1*1mm. Its main component is silicon, which has a high compressive resistance. Only shear force can destroy it. Bottle caps are mostly made of plastic, which is soft in texture. When the bottle cap is opened, the antenna is fragile but the chip is difficult to be destroyed. Therefore, counterfeiters use the characteristics of the chip to recycle and reuse it. Although the chance of successful re-binding is small and the difficulty is great, it still cannot resist the temptation of profit. Summary of the invention

[0004] In view of the above problems, the present invention provides an RFID tag whose chip cannot be recycled.

[0005] The technical solution adopted by the present invention is as follows: an RFID tag capable of preventing chip reuse, comprising a chip, an antenna, and an anisotropic conductive adhesive, wherein the conductive adhesive is arranged between the chip and the antenna, and further comprising: an insulating layer that can be dissolved by an organic solvent, wherein the chip contacts including status contacts and radio frequency contacts are connected to the antenna through the conductive adhesive, and a part of the status contacts are covered with an insulating layer; the chip detects the connection status of the status contacts, and when the connection status changes, the chip stops working normally.

[0006] Furthermore, the portion of the state contacts covering the insulating layer may be one or more.

[0007] Furthermore, the insulating layer material is a resin material, preferably epoxy resin.

[0008] The present invention also provides another RFID tag that can prevent chip reuse, including a chip, an antenna, and a conductive adhesive. The conductive adhesive is arranged between the chip and the antenna, and the contacts of the chip are connected to the antenna through the conductive adhesive. It also includes: an insulating layer that can be dissolved by an organic solvent. Any two contacts of the chip, each contact extends to the other contact to form a semi-enclosed structure, the extended part of the contact is not connected to the enclosed contact, and the insulating layer covers the extended part of the contact.

[0009] Furthermore, the insulating material is a resin material, preferably epoxy resin.

[0010] The present invention also provides a method for preventing the reuse of RFID tag chips. The RFID tag includes a chip, an anisotropic conductive glue, and an antenna. The chip includes a status contact and a radio frequency contact. The radio frequency contact is connected to the antenna through the conductive glue to maintain the normal operation of the RFID. A part of the status contacts is covered with an insulating layer that can be dissolved by an organic solvent, and another part of the contacts is connected to the antenna through the conductive glue. The chip detects the connection state between the status contacts and the chip. When the connection state between the status contacts and the antenna changes, the chip stops working normally.

[0011] Furthermore, the portion of the state contacts covering the insulating layer may be one or more.

[0012] The present invention also provides another method for preventing the reuse of RFID tag chips. The RFID tag includes a chip, an anisotropic conductive glue, and an antenna. The chip contacts are connected to the antenna through the conductive glue. Each of any two contacts of the chip is extended to the other contact to form a semi-enclosed structure. The extended part of the contact is not connected to the enclosed contact, and the extended part of the contact is covered with an insulating layer that can be dissolved by an organic solvent. When rebinding, the insulating layer is washed away, and the two contacts and the antenna form a loop, so that the chip is short-circuited and stops working.

[0013] Compared with the prior art, the beneficial effect of adopting the above technical solution is that the chip on the RFID tag is designed to prevent short circuit or change of chip connection status during recycling and reuse, which may cause the chip to fail to work normally, thereby ensuring the one-time use of the chip and achieving the effect of traceability and anti-counterfeiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partial cross-sectional view of an RFID tag in which a chip is not bound to an antenna in one embodiment of the present invention.

[0015] Figure 2 It is a partial cross-sectional view of the RFID tag after the chip is bound to the antenna in one embodiment of the present invention.

[0016] Figure 3FIG. 1 is a plan view of a chip after recovery in one embodiment of the present invention.

[0017] Figure 4 FIG. 1 is a cross-sectional view of a chip after rebinding in one embodiment of the present invention.

[0018] Figure numerals: 1-chip, 2-contact, 3-insulating layer, 4-conductive glue, 5-antenna, 21-contact covered with insulating layer, 22-contact not covered with insulating layer. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings.

[0020] Example 1

[0021] like Figure 2 As shown, an RFID tag that can prevent chip reuse includes a chip 1, an antenna 5, and an anisotropic conductive glue 4, wherein the conductive glue is arranged between the chip and the antenna, and further includes: an insulating layer 4 that can be dissolved by an organic solvent, wherein the chip contacts 2 include status contacts and radio frequency contacts, wherein the radio frequency contacts are connected to the antenna through the conductive glue to maintain the normal operation of the RFID; a part of the contacts 21 in the status contacts are covered with an insulating layer, and another part of the contacts 22 are connected to the antenna through the conductive glue; the chip detects the connection state between the status contacts and the chip, and when the connection state between the status contacts and the antenna changes, the chip stops working normally. The radio frequency contacts are used to communicate with the antenna, and the status contacts are used to indicate the connection state, so that the chip can judge the state.

[0022] Preferably, the state contacts covering a portion of the insulating layer may be one or more.

[0023] Preferably, the insulating layer material is epoxy resin.

[0024] In practical applications, Figure 1 This is a schematic diagram of setting up a chip with an insulating layer. The antenna has not yet been bound. Figure 2 As shown, the conductive glue is set between the chip contact and the antenna, and a layer of insulating layer that can be dissolved by organic solvent is covered on some state contacts 21 of the chip, and the remaining contacts 22 are exposed and connected to the antenna through the conductive glue to ensure the normal operation of the tag. When powered on, according to the binding condition of the state contacts, the chip has an initial connection state; Figure 3 As shown, when the conductive glue 4 is cleaned during the rebinding, the insulating layer 3 on the chip contacts is cleaned at the same time. Figure 4 As shown, after the chip is re-bound and powered on, all contacts 2 of the chip are connected to the antenna, causing the connection state of the chip to change. The chip detects the state change and starts chip self-destruction or stops the radio frequency function to achieve the anti-reuse function.

[0025] Example 2

[0026] An RFID tag capable of preventing chip reuse comprises a chip, an antenna, and a conductive adhesive, wherein the conductive adhesive is arranged between the chip and the antenna, and the chip contacts are connected to the antenna through the conductive adhesive. The RFID tag also comprises an insulating layer that can be dissolved by an organic solvent, wherein any two contacts of the chip each extend around the other contact to form a semi-enclosed structure, the extended portion of the contact is not connected to the enclosed contact, and the insulating layer covers the extended portion of the contact.

[0027] Preferably, the insulating material is epoxy resin.

[0028] In actual applications, since the contact extension part is covered with an insulating layer and the contact is not covered, when the conductive glue covers the chip, the contact is connected to the antenna through the conductive glue; in the re-binding process, when the conductive glue is cleaned, the insulating layer covering the contact extension part is also cleaned away, and the covered contact extension part and the contact are exposed at the same time. During re-binding, the contact and the contact extension part are both connected to the antenna through the conductive glue. As a result, the two contacts and the antenna form a loop, causing the chip to short-circuit and fail to work.

[0029] Example 3

[0030] This embodiment provides a method for preventing RFID tag chip from being reused. The RFID tag includes a chip, an anisotropic conductive glue, and an antenna. The chip includes a status contact and a radio frequency contact. The radio frequency contact is connected to the antenna through the conductive glue to maintain the normal operation of the RFID. A part of the status contacts is covered with an insulating layer that can be dissolved by an organic solvent, and another part of the contacts is connected to the antenna through the conductive glue. The chip detects the connection status between the status contacts and the chip. When the connection status between the status contacts and the antenna changes, the chip self-destructs or stops the radio frequency function to achieve the anti-reuse function.

[0031] Preferably, the state contacts covering a portion of the insulating layer may be one or more.

[0032] Example 4

[0033] This embodiment provides a method for preventing the reuse of RFID tag chips. The RFID tag includes a chip, an anisotropic conductive glue, and an antenna. The chip contacts are connected to the antenna through the conductive glue. Each of any two contacts of the chip is extended to the other contact to form a semi-enclosed structure. The extended part of the contact is not connected to the enclosed contact, and the extended part of the contact is covered with an insulating layer that can be dissolved by an organic solvent. When rebinding, the insulating layer is washed off, and the two contacts are connected to the antenna through the conductive glue to form a loop with the antenna, so that the chip is short-circuited and stops working.

[0034] The present invention improves the RFID tag and achieves the effect of self-destruction when the chip is re-bound through structural design, thereby ensuring the one-time use of the chip and achieving the effects of traceability and anti-counterfeiting.

[0035] The present invention is not limited to the aforementioned specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed. If non-substantial changes or improvements made by those skilled in the art without departing from the spirit of the present invention, they should fall within the scope of protection of the claims of the present invention.

[0036] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0037] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for preventing the reuse of an RFID tag chip, the RFID tag comprising a chip, an anisotropic conductive adhesive, and an antenna, wherein the conductive adhesive is disposed between the chip and the antenna, characterized in that: The chip includes a status contact and a radio frequency contact, and the radio frequency contact is connected to the antenna through conductive glue to maintain the normal operation of the RFID; A portion of the state contacts is covered with an insulating layer that can be dissolved by an organic solvent, and another portion of the contacts is connected to the antenna via a conductive adhesive; The chip detects the connection status between the status contact and the chip. When the connection status between the status contact and the antenna changes, the chip stops working normally. There are one or more status contacts covering a part of the insulating layer. The insulating layer material is a resin material.

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