Electronic Document Magnetic Strip Masking via Thin Decor Layer
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Solution Overview
Problem
The existing methods for manufacturing electronic documents with hidden magnetic strips face challenges in achieving the required magnetic strip efficiency due to the attenuation caused by multiple layers of masking and decoration, which often exceed the thickness criteria set by ISO standards.
Innovation Solution
A method involving the application of a magnetic strip with a DeltaE contrast of 15 or less to the surface of an electronic document body, followed by a decoration with a thickness of at most 10 μm and an opacity ratio of at least 70% in the visible range, ensuring the magnetic strip is masked effectively without compromising the layer thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple masking and decorative layers are applied over the magnetic strip, then the magnetic strip is better masked and decorated, but the total layer thickness increases and magnetic strip efficiency decreases
Solution Approach 1:
The patent combines the masking function and decorative function into a single integrated layer. This decorative masking layer simultaneously provides the necessary masking effect to hide the magnetic strip and the desired decorative appearance, eliminating the need for separate masking and decorative layers. This reduces the total layer thickness from 7-12 μm to a thinner combined layer, thereby maintaining magnetic strip efficiency while achieving both masking and decoration goals.
Solution Approach 2:
The decorative masking layer is designed to perform multiple functions: it acts as a masking layer to reduce the contrast between the magnetic strip and substrate, serves as a decorative element with various patterns and colors, and provides a base for additional decorative elements. This multi-functional approach eliminates the need for multiple separate layers, reducing total thickness and preserving magnetic strip efficiency.
2Reliability
If a reinforced magnetic tape with higher amplitudes is used, then the magnetic tape response quality is improved, but the total layer thickness increases
Solution Approach 1:
The patent merges the masking function into the decorative layer itself, creating a thin combined layer that provides both masking and decoration. This eliminates the need for a separate masking layer, reducing the total layer thickness to under 10 μm while maintaining sufficient masking effect through the integrated design.
Solution Approach 2:
The patent changes the optical parameters of the decorative layer by controlling its opacity ratio (70-90%) and thickness (≤10 μm) to achieve the desired masking effect. By optimizing these parameters, the patent achieves effective masking with a thinner total layer, eliminating the need for reinforced magnetic tape with higher amplitudes.
3Ease of manufacture
If the magnetic strip is heavily covered with masking and decorative layers, then the aesthetic appearance is improved, but the magnetic strip response quality is attenuated
Solution Approach 1:
The patent combines masking and decoration into a single thin layer with optimized opacity (70-90%), providing sufficient aesthetic appearance while minimizing interference with magnetic strip response quality.
Solution Approach 2:
The patent optimizes the opacity ratio parameter of the decorative masking layer to be between 70-90%, which provides adequate masking for aesthetic appearance while allowing sufficient magnetic field penetration to maintain magnetic strip response quality. The thickness is controlled to be ≤10 μm to further minimize attenuation.
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 enhances the magnetic strip's efficiency by reducing the total layer thickness, allowing better compliance with ISO standards while providing adjustable masking through the combination of DeltaE contrast and opacity, thus improving the product's quality and design flexibility.
Implementation Method 1
an apparent surface, formed by the surface of the body covered at least in part by the magnetic stripe, having a DeltaE contrast equal to or less than 15, or even 10, the DeltaE contrast being a color difference measurement defined by the International Committee on Illumination
Implementation Method 2
the decoration having a thickness of at most 10 μm and having an opacity ratio at wavelengths in the visible range of at least 70%
Data Source
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AI summary
A method for producing an electronic document (30) comprising a concealed magnetic strip, comprising a step (22) of providing a surface (310) of an electronic document body (30), a step (23) of applying a magnetic strip (33) to at least part of the surface (310) of the electronic document body (30), a visible surface (34), formed by the surface (310) of the body covered at least in part by the magnetic strip (33), having a Delta E contrast equal to or less than 15, and a step (24, 25, 26) of applying a decor (32) that covers the surface (310) of the body above the magnetic strip (33), the decor (32) having a thickness of at most 10 µm and having an opacity ratio at wavelengths in the visible domain of at least 70%; and a corresponding electronic document (30).