Contactless Tag Shielding in Card Cavity
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Solution Overview
Problem
Existing contactless electronic tags designed for metallic environments, such as mobile phones, are thick due to intermediate magnetically hyper-conductive layers and are not easily customizable, limiting their diversity and compatibility with various formats.
Innovation Solution
A contactless electronic device with a near-field communication antenna and a magnetic shielding layer integrated into a microcircuit card body with a detachable plate, allowing for customizable shapes and formats without requiring specialized equipment, as the shielding layer is housed within a cavity in the card body, maintaining a standardized thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an intermediate layer and cover are added to protect the antenna in a metallic environment, then magnetic shielding is improved, but the tag thickness increases
Solution Approach 1:
The magnetic shielding layer is merged with the card body structure by integrating it into a cavity within the body. This combines the shielding function with the structural support function, eliminating the need for separate intermediate layers and covers, thereby maintaining protection while reducing overall thickness.
Solution Approach 2:
The magnetic shielding layer is nested within a cavity in the card body, placing one structure inside another. This nesting approach allows the shielding layer to be housed within the existing body structure rather than adding external layers, thus maintaining a thin profile while providing magnetic interference protection.
2Adaptability or versatility
If the tag structure is made complex to accommodate various formats, then customization capability is improved, but manufacturing complexity increases
Solution Approach 1:
The tag is segmented into a standardized card body and a separate detachable plate. The card body maintains a uniform standardized structure for easy manufacturing, while the detachable plate can be customized in various formats and shapes. This segmentation allows customization without increasing the complexity of the main body structure.
Solution Approach 2:
The standardized card body serves as a universal support structure that can accommodate different types of detachable plates with various formats and shapes. This universal design allows the same card body to support multiple customization options, enabling versatility without requiring specialized manufacturing equipment or complex structures.
3Ease of manufacture
If a standardized card body is used for all tag formats, then manufacturing simplicity is improved, but adaptability to different shapes is reduced
Solution Approach 1:
The tag is divided into a standardized card body and a detachable plate. The card body maintains uniform standardized dimensions and structure for simple manufacturing, while the detachable plate can be formed in various shapes and formats. This segmentation decouples the manufacturing simplicity of the body from the shape variety of the final tag.
Solution Approach 2:
The detachable plate can be dynamically attached to or removed from the standardized card body. This dynamic connection allows the same standardized body to be combined with different plate shapes and formats, providing adaptability without requiring the body itself to be complex or varied in structure.
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
Enables easy customization of tags in various shapes and formats, ensuring optimal protection against magnetic interference while maintaining a thin profile, allowing for post-manufacture customization without dedicated equipment, and compatibility with metallic environments.
Implementation Method 1
a magnetic shielding layer arranged to extend at least partially under the antenna area
Data Source
AI summary
The device (10) includes a near-field communication antenna (12) delimiting a useful magnetic field receiving area (S), a microcircuit (14) connected to the antenna (12) and a magnetic shielding layer (16) arranged so as to extend at least partially under the area (S). It also includes a support (18) built into a microcircuit card body (20) including an open cavity (30) in one of its faces (F2) extending at least partially under the antenna area (S) and sized so as to completely accommodate the shielding layer (16). More specifically, the body (20) includes a detachable plate (22) within which are arranged the antenna (12) and the microcircuit (14) and within which the layer (16) extends at least partially.