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RFID tag anti-transfer method using random capacitor

A technology of RFID tags and capacitors, which is applied in the direction of record carriers used in machines, computer components, instruments, etc., can solve the problems of high cost, large tag volume, and cumbersome label production process, etc.

Pending Publication Date: 2021-08-24
华大恒芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, research on anti-counterfeiting has become increasingly mature. For example, CN202010373859.2 proposes a fragile anti-counterfeiting label that is easy to remove. However, after the label is torn, a complete chip can be obtained, and the RFID label can still be used when the chip is packaged; CN202010432963.4 also proposes a dynamic color-changing two-dimensional code anti-counterfeiting label, and the protection is set outside the label body for customs clearance. Frame, temperature-sensitive color-changing layer, anti-counterfeiting information layer, the protective frame can be quickly snapped and disassembled, and the anti-counterfeiting information layer contains a variety of anti-counterfeiting information to effectively protect the label body, but the production process of this kind of label is cumbersome and costly , and the size of the label is relatively large, so it is not suitable to be used on some expensive and delicate commodities

Method used

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  • RFID tag anti-transfer method using random capacitor
  • RFID tag anti-transfer method using random capacitor
  • RFID tag anti-transfer method using random capacitor

Examples

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Embodiment 1

[0035] In this embodiment, a method for preventing transfer of RFID tags using random capacitance is provided, including the following steps:

[0036] S1: setting at least one capacitive plate on the top layer metal in the chip;

[0037] S2: Planarly arrange a metal film parallel to the top layer metal on the package bump of the chip;

[0038] S3: The chip and the tag antenna are packaged together to form an RFID tag, and the capacitor plate and the metal film form an initialization capacitor.

[0039] In this embodiment, the chip and tag antenna obtained in step S1 and step S2 are packaged together to form an RFID tag structure diagram, which can be referred to figure 1 and figure 2 , the top layer metal 5 of the RFID chip body 8 is provided with at least one capacitive plate, figure 1 and figure 2 There are three of them, and of course it can be any other number. The upper plane of the packaging bump 4 of the RFID chip body 8 is provided with a metal film 7 correspondi...

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PUM

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Abstract

The invention provides an RFID tag anti-transfer method using a random capacitor. The RFID tag anti-transfer method comprises the following steps: arranging at least one capacitor plate on top-layer metal in a chip; arranging a metal film parallel to the top-layer metal on the upper plane of the packaging salient point of the chip; and packaging the chip and a tag antenna together to form an RFID tag, wherein the capacitor plate and the metal film form an initialization capacitor. According to the method, whether the tag is repeatedly used or not is verified through the difference between the capacitance of the capacitor plate and the capacitor of the metal film and the initialization capacitor after the RFID tag is transferred, and anti-counterfeiting is achieved.

Description

technical field [0001] The invention relates to the technical field of anti-counterfeiting electronic tags, in particular to a method for preventing transfer of RFID tags using random capacitance. Background technique [0002] RFID radio frequency identification technology is commonly used in the anti-counterfeiting of valuables. In the existing technology, chips or labels can be removed from the packaging antenna without damage through certain technical means; How to realize the anti-counterfeiting of labels has always been a research direction. [0003] In recent years, the research on anti-counterfeiting has become more and more mature. For example, CN202010373859.2 proposes a fragile anti-counterfeiting label that is easy to remove. However, after the label is torn, a complete chip can be obtained, and the RFID label can still be used after packaging the chip; CN202010432963.4 also proposes a dynamic color-changing two-dimensional code anti-counterfeiting label, which i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077
CPCG06K19/07745
Inventor 帅谊鹏
Owner 华大恒芯科技有限公司
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