RFID Closure Inlay Layout for Induction-Sealed Container Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing RFID tags located on container closures face issues with interference from metallic liners, which can deactivate or damage the RFID chip due to induction heating, and are vulnerable to removal, compromising tracking integrity.
Innovation Solution
An RFID inlay is designed with a nonconductive substrate and a first induction heating annular ring, separating the RFID chip from the heating ring, and includes a conductive antenna configured to receive high or ultra-high frequency signals, with optional capacitors and resistors for protection, and a non-foil sealing liner to prevent interference and ensure secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an RFID tag is placed on a container closure, then tracking functionality is achieved, but the RFID chip may be damaged by induction heating from metallic liners
Solution Approach 1:
A non-conductive barrier layer is introduced between the RFID chip and the metallic liner to prevent induction heating interference. This intermediary layer blocks the harmful electromagnetic coupling while allowing the system to maintain both tracking functionality and protection from the metallic liner.
Solution Approach 2:
The inlay structure is divided into separate functional layers: a non-conductive substrate layer for RFID chip mounting, a conductive heating ring layer for induction sealing, and a metallic liner layer for product protection. This segmentation isolates the RFID chip from harmful electromagnetic fields while preserving the sealing and protection functions.
2Reliability
If an RFID tag is placed inside a container, then removal risk is reduced, but interference from metallic liners deactivates the RFID tag
Solution Approach 1:
The non-conductive barrier layer acts as a mediator that allows the RFID tag to be positioned inside the container (improving tracking integrity by reducing removal risk) while simultaneously protecting the tag from interference by the metallic liner through electromagnetic isolation.
Solution Approach 2:
The inlay structure provides different properties in different regions: the RFID chip area has non-conductive properties for electromagnetic isolation, while the outer ring has conductive properties for induction heating. This local differentiation allows the system to simultaneously protect the RFID tag and enable secure sealing.
3Reliability
If a metallic liner is used to protect products from air and moisture, then product protection is achieved, but the liner deactivates or damages the RFID chip
Solution Approach 1:
The inlay is segmented into distinct functional zones: a non-conductive substrate zone for RFID chip placement that isolates the chip from the metallic liner, and a conductive outer ring zone that enables induction heating for sealing. This segmentation allows the metallic liner to provide product protection without directly contacting or damaging the RFID chip.
Solution Approach 2:
The non-conductive substrate and barrier layer serve as intermediaries between the metallic liner and the RFID chip, allowing the metallic liner to maintain its product protection function while preventing harmful electromagnetic coupling to the RFID chip.
4Strength
If induction heating is used to attach the liner to the container, then secure sealing is achieved, but induced current stresses the RFID chip causing damage
Solution Approach 1:
The inlay structure separates the induction heating function (conductive outer ring) from the RFID chip mounting function (non-conductive substrate). This segmentation allows induced currents to flow in the outer ring for strong sealing attachment while preventing those currents from reaching and stressing the RFID chip.
Solution Approach 2:
The non-conductive substrate and barrier layer act as intermediaries that block induced currents from reaching the RFID chip during induction heating processes, thereby protecting the chip while still allowing the induction heating to achieve secure sealing attachment.
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
The solution effectively protects the RFID chip from induction heating interference, ensures secure attachment to the container, and maintains tracking functionality while preventing tampering, with detection ranges up to 20 feet.
Implementation Method 1
metallic and other liners are typically attached to the container or closure through use of induction heating to melt a layer of polymeric material in order to secure the liner to the container or the closure
Implementation Method 2
The antenna is configured to receive a signal from a remote transmitter and convey the signal to the microchip
Implementation Method 3
RFID technology has been used in recent years by applying an RFID tag to the outside of a container. The RFID tag can then be tracked using conventional radio frequency technology
Data Source
AI summary
An RFID Inlay for mounting to closure for a container. The RFID inlay includes a nonconductive substrate with a first induction heating annular ring located on the substrate proximate an outer periphery of the substrate. An RFID antenna is located on the substrate within the inner periphery of the annular ring. An RFID chip is on the first side of the substrate and operatively coupled to the antenna. A method is disclosed for forming the RFID inlay, including forming on a first side of a substrate a conductive layer, the conductive layer having (i) a first induction heating annular ring located proximate the outer periphery of the substrate, the annular ring having an inner periphery; and (ii) an antenna located within the inner periphery of the annular ring; and placing an RFID chip on the first side of the substrate and operatively coupling the RFID chip to the antenna.