Molded RFID Card Assembly for Strength and RF Performance
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Solution Overview
Problem
Metal transaction cards with electronic components face challenges in incorporating inductive coupling IC chips and RF electronics due to machining geometries that weaken the card's strength and compromise RF performance while maintaining aesthetic appeal.
Innovation Solution
A process involving forming an opening in the card body for an electronic component, inserting it, and molding a material around it, using overmolding or insert molding techniques to encapsulate the component and enhance structural rigidity and RF performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional RFID tag with separate antenna and IC components is used, then the manufacturing process becomes complex and costly, but the reading accuracy and reliability may be compromised
Solution Approach 1:
The patent merges the antenna and IC components into a single integrated RFID tag structure. The antenna is formed directly on the substrate using conductive material, eliminating the need for separate antenna components and complex assembly processes. This integration maintains reading accuracy while significantly simplifying the manufacturing process and reducing costs.
Solution Approach 2:
The substrate serves multiple functions simultaneously: it acts as the base for mounting the IC component, provides the antenna structure through conductive patterns, offers mechanical support, and enables wireless communication. This multi-functionality reduces the overall component count and simplifies the device architecture while maintaining reliable RFID operation.
2Strength
If rigid packaging materials are used to protect the RFID tag, then the tag is protected from damage, but the tag cannot be bent or deformed which limits application flexibility
Solution Approach 1:
The patent uses a flexible substrate material that can be bent and deformed without breaking. The RFID tag components (IC, antenna) are mounted on or integrated into this flexible substrate, allowing the entire tag to be conformally attached to curved or irregular surfaces while maintaining structural integrity and protection against damage.
Solution Approach 2:
The packaging material transitions from a static rigid structure to a dynamic flexible structure that can adapt its shape. The flexible substrate allows the RFID tag to change its configuration as needed, enabling it to conform to different surfaces and applications while maintaining protective enclosures and structural support.
3Adaptability or versatility
If conformal attachment methods are used to attach the RFID tag to irregular surfaces, then the tag fits the surface better, but conventional rigid tags cannot achieve proper contact
Solution Approach 1:
The flexible substrate enables the RFID tag to conform to irregular surfaces by bending and flexing to match the surface geometry. This conformal attachment ensures reliable contact and signal transmission while maintaining secure mounting, solving the problem that rigid tags cannot achieve proper contact with non-planar surfaces.
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 strengthens the card's structure and improves RF performance by encapsulating electronic components, maintaining the desired appearance and functionality.
Implementation Method 1
RFID (Radio Frequency Identification) technology uses electromagnetic induction to wirelessly transmit identification information
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3D
AI summary
A process for manufacturing a transaction card includes forming an opening in a card body of the transaction card; inserting an electronic component into the opening; and disposing a non-conductive material about the electronic component. A transaction card includes a molded electronic component.