Segmented Sacrificial Track for Anti-Counterfeiting NFC Tags
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Solution Overview
Problem
Conventional anti-counterfeiting NFC tags for bottles often fail due to premature breaking of the sacrificial track during assembly, especially when the bottle cap has a hard protruding portion, leading to discontinuity detection issues.
Innovation Solution
The sacrificial conductive track is split into mechanically independent but electrically connected sub-segments, with each segment divided into two sub-segments that are laterally disconnected but remain electrically connected at the ends, reducing the likelihood of simultaneous rupture and ensuring continued conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sacrificial track is made as a single continuous segment, then the electrical conduction is ensured, but the track is more prone to breaking during assembly
Solution Approach 1:
The sacrificial track is divided into multiple sub-segments that are mechanically separated but electrically connected through conductive adhesive. This segmentation reduces the stress concentration on any single point, making the track more resistant to breaking during assembly while maintaining continuous electrical conduction through the adhesive bonds between segments.
2Strength
If the sacrificial track is split into multiple sub-segments, then the resistance to breaking is improved, but the electrical conduction may be interrupted
Solution Approach 1:
Conductive adhesive is used as an intermediary material to electrically connect the mechanically separated sub-segments of the sacrificial track. The adhesive serves as both a bonding agent and an electrical conductor, ensuring continuous signal transmission while allowing the segments to be mechanically independent and more resistant to breaking.
3Reliability
If the sacrificial track is made robust against breaking, then the false activation is reduced, but the complexity of the track structure increases
Solution Approach 1:
The track is segmented into multiple sub-segments connected by conductive adhesive, which reduces the probability of simultaneous breaking at multiple points. This segmentation approach prevents false activation due to premature breaking while adding minimal structural complexity compared to a single continuous track.
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
This design significantly reduces the probability of simultaneous rupture of the sub-segments, maintaining electrical conduction and enhancing the robustness of the anti-counterfeiting tag against cracking, thereby preventing false activation and ensuring authenticity verification.
Implementation Method 1
near-field magnetically coupled contactless identification devices
Data Source
AI summary
A near-field magnetically coupled anti-counterfeiting tag including a sacrificial conductive track crossing a sacrificial zone of the tag. Each segment of the sacrificial track crossing the sacrificial zone is split longitudinally into a plurality of sub-segments, the sub-segments being in electrical contact with each other at the ends of the segment.