RFID Tag Attachment Using Conductive Strip Severing
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Solution Overview
Problem
Current methods for attaching RFID chips to antenna structures in RFID tags are costly and inefficient, particularly due to the mechanical bonding process, which does not benefit from advances in IC manufacturing and is not suitable for flexible RFID tags, leading to high production costs and reduced operational speed.
Innovation Solution
A method involving the application of conductive strips to shipping articles, where an RFID chip with barbs and a nonconductive fin is used to sever the strip, allowing for secure and efficient attachment without the need for precise alignment, enabling high-speed, continuous production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard bonding processes are used to attach RFID chips to antenna structures, then reliable electrical connection is achieved, but production cost increases and manufacturing complexity increases
Solution Approach 1:
The patent extracts the electrical connection function from the complex bonding process by using discrete conductive elements (bars, strips, or spheres) that make direct contact with the RFID chip electrodes. This eliminates the need for traditional wire bonding or flip-chip bonding processes, significantly simplifying manufacturing while maintaining reliable electrical connection.
Solution Approach 2:
The patent segments the antenna structure into modular components (conductive bars, strips, or spheres) that can be independently positioned and attached to the RFID chip. This segmentation allows for simpler attachment mechanisms and reduces manufacturing complexity compared to monolithic antenna structures requiring precise bonding.
2Reliability
If mechanical bonding processes are used for attaching RFID chips, then secure attachment is achieved, but production speed decreases due to lack of economies of scale
Solution Approach 1:
The patent replaces complex mechanical bonding systems with simpler attachment mechanisms such as adhesive bonding, mechanical insertion, or snap-fit structures. These simplified mechanisms can be implemented at high speeds on production lines, unlike traditional wire bonding or flip-chip bonding which require precise positioning and slow processing.
Solution Approach 2:
The patent changes the attachment parameters from precision-critical bonding processes to more tolerant attachment methods. The conductive elements are designed with dimensions and tolerances that allow for faster, less precise attachment while maintaining secure connection and electrical performance.
3Reliability
If traditional bonding methods are used, then electrical connection is achieved, but flexibility and adaptability to soft substrates is reduced
Solution Approach 1:
The patent employs flexible conductive elements such as thin conductive strips or films that can conform to soft and flexible substrates. These flexible conductors maintain electrical connection while allowing the RFID tag to be attached to flexible surfaces like fabric, paper, or flexible plastics, unlike rigid wire bonding structures.
Solution Approach 2:
The patent uses composite material structures combining flexible substrates with conductive elements that maintain electrical connectivity while providing flexibility. The combination of flexible polymer materials with conductive traces or elements creates tags that are both electrically functional and mechanically flexible.
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 approach significantly reduces production costs and increases operational speed, enabling the production of high-quality RFID tags at a higher rate than existing methods, with improved security and reliability.
Implementation Method 1
The RFID chip is attached to the shipping article by inserting the chip onto the strip of conductive material on the shipping article such that the fin severs the strip into a first strip and a second strip
Data Source
AI summary
A method for installing an RFID tag on shipping articles includes applying a strip of conductive material to the surface of the article and providing an RFID chip having a body, a first bottom conductive point, a second bottom conductive point and a nonconductive fin between the first bottom conductive point and the second bottom conductive point. The fin is received in the shipping article. The RFID chip is attached to the shipping article by inserting the chip onto the strip of conductive material on the shipping article such that the fin severs the strip into a first strip and a second strip. The first bottom conductive point is electrically attached to the first strip and the second bottom conductive point is electrically attached to the second strip.