Adhesive Security Label with Trapped RFID Chip
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Solution Overview
Problem
Identity and security documents, such as visas and passports, face challenges in security due to the vulnerability of integrated RFID tags, which can be easily extracted and reused, and the need for high opacity to conceal antennas complicates flexibility and readability.
Innovation Solution
An adhesive label with a 'sandwich' structure, where the contactless chip is trapped between two sheets, with the antenna on the reverse side coated with adhesive, making it difficult to extract and reuse, and incorporating weakening lines to prevent delamination, ensuring the chip's protection and the label's flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the label thickness is increased to achieve high opacity for concealing antennas, then the opacity is improved, but the flexibility deteriorates and the label becomes more prone to delamination
Solution Approach 1:
The antenna is repositioned from the front face to the rear face of the label, changing its spatial dimension. This allows the front face to maintain high opacity for security concealment while the rear face houses the antenna, eliminating the need to increase thickness for opacity while preserving flexibility.
Solution Approach 2:
The label is divided into distinct functional layers: the front face sheet provides opacity and security features, the rear face sheet houses the antenna, and an adhesive layer bonds them together. This segmentation allows each layer to optimize its specific function without compromising the others.
2Ease of operation
If the chip is placed on the front face for easy access, then the ease of operation is improved, but the security deteriorates due to increased extraction and modification risks
Solution Approach 1:
The chip is repositioned from the front face to the rear face of the label, changing its spatial location. This maintains operational accessibility through contactless reading while significantly improving security by hiding the chip from view and making extraction more difficult.
Solution Approach 2:
The rear face sheet acts as an intermediary layer that houses the chip and provides a secure mounting location. This intermediary structure protects the chip while still allowing electromagnetic signals to pass through for contactless operation.
3Ease of operation
If the antenna is placed on the front face for easy reading, then the ease of operation is improved, but the security deteriorates due to increased visibility and extraction risks
Solution Approach 1:
The antenna is repositioned from the front face to the rear face of the label. This maintains readability through contactless electromagnetic signaling while improving security by concealing the antenna from visual inspection and making physical extraction more difficult.
4Reliability
If the adhesive covers the antenna completely for security, then the security is improved, but the manufacturing complexity increases
Solution Approach 1:
The adhesive layer is segmented to cover only the necessary portions of the antenna structure, specifically covering the coil windings while leaving connection points accessible. This provides security coverage without requiring complete coverage, simplifying the manufacturing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances security by making it difficult to extract and reuse the RFID tag, while maintaining flexibility and improving readability by hiding the antenna, thus reinforcing the security of the document.
Implementation Method 1
the reverse face of the second sheet is coated with an adhesive which provides irreversible bonding
Implementation Method 2
integrated circuit of the contactless electronic chip type connected to connection pads to said antenna
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention concerns an identity and security document consisting in an adhesive label comprising a sheet (3), called "first sheet", whereof the recto side (30) bears at least features (73) in particular printed related to the identity of its bearer. Said document is characterized in that it comprises a supplementary sheet (4), called "second sheet", whereof the reverse side (41) bears an antenna, while its recto side (40) bears an integrated circuit such as a non-contact silicon chip (60) connected to pads for connection (611) to said antenna, which are connected thereto through said sheet (4); and in that the reverse side (31) of said first sheet (3) is fixed to the recto side (40) of the second sheet (41) thus enclosing therebetween said chip (60); and in that the reverse side (41) of the second sheet (4) is coated with an adhesive which provides an irreversible bonding and which covers at least part of said antenna (61).