Metal Card Core Segmentation for Electromagnetic Isolation
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Solution Overview
Problem
Current information carrying cards made of plastic or polymer materials lack desired tactile response and strength, and the use of conductive materials is hindered by electromagnetic coupling issues.
Innovation Solution
A card core with a cutout and sinuous line discontinuity is designed to include a channel with curved and straight portions, which electromagnetically isolates circuit elements and reduces eddy currents, while maintaining flexibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conductive materials are used for information carrying cards, then tactile response and strength are improved, but electromagnetic coupling between circuit elements and the conductive material occurs
Solution Approach 1:
The card core is divided into multiple segments through cutouts and sinuous line discontinuities, breaking the continuous conductive path into isolated sections. This segmentation reduces electromagnetic coupling between circuit elements while maintaining the structural strength and tactile response of the metal card core.
Solution Approach 2:
The metal card core incorporates localized non-conductive regions (cutouts and discontinuities) at specific positions where electromagnetic isolation is needed, while maintaining conductive properties in other areas for structural integrity. This creates different electromagnetic properties in different locations of the same card core.
2Object-affected harmful factors
If plastic or polymer materials are used for information carrying cards, then electromagnetic coupling is reduced, but tactile response and strength deteriorate
Solution Approach 1:
The card structure combines metal card core material with non-conductive materials (such as plastic or polymer layers) to create a composite card. The metal core provides strength and tactile response, while the non-conductive layers reduce electromagnetic coupling, achieving benefits from both material types.
3Ease of manufacture
If a continuous metal card core is used, then manufacturing simplicity is maintained, but electromagnetic interference and eddy currents increase
Solution Approach 1:
The continuous metal card core is segmented through cutouts and sinuous line discontinuities that break up potential eddy current paths. These discontinuities are integrated into the card core manufacturing process, maintaining relative manufacturing simplicity while effectively reducing eddy currents and electromagnetic interference.
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 provides a card core with enhanced tactile response, durability, and resistance to electromagnetic interference, ensuring the card's integrity and functionality.
Implementation Method 1
The cutout includes a first portion having a first geometry and a second portion having a second geometry and is sized and configured to define a gap between an element positioned in the cutout and the edge to electromagnetically isolate the element from the body
Data Source
AI summary
A card core includes a body defining a cutout and a discontinuity. The cutout includes an opening in the body defined by an edge and the discontinuity includes a channel defined by the body extending from an outer surface of the body to the cutout. The cutout is sized and configured to define a gap between an element positioned in the cutout and the edge to electromagnetically isolate the element from the body.