Multi-layered Security Document Aperture Structure
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Solution Overview
Problem
Existing multi-layered structures in identification documents are vulnerable to counterfeiting, as counterfeiters continually evolve methods to replicate security features.
Innovation Solution
A secure multi-layered structure comprising three layers, each with an aperture, where each layer overlaps with the adjacent layer, and the third layer is visible through the first aperture, creating a central aperture with 'steps' that makes the structure difficult to counterfeit. Additionally, the use of photoluminescent materials and laser-engraved regions enhances security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers with apertures are used to create security features, then the security against counterfeiting is improved, but the device complexity increases
Solution Approach 1:
The security feature is divided into multiple separate layers (first layer, second layer, third layer), each containing an aperture. This segmentation allows each layer to be individually manufactured and then assembled, creating a complex multi-layered structure that is difficult to counterfeit while maintaining manageable production processes for each individual layer.
Solution Approach 2:
The apertures in the multiple layers are positioned such that they align to form a central aperture with steps when viewed from above. The third layer is visible through the first aperture, creating a nested visual effect where layers are stacked and partially visible through each other, similar to nested dolls.
2Difficulty of detecting and measuring
If photoluminescent materials are added to layers, then the detectability of security features is improved, but the manufacturing complexity increases
Solution Approach 1:
Photoluminescent materials are applied locally to specific regions of the layers rather than uniformly across the entire document. This allows the security features to be enhanced in specific areas where they are most needed for detection and verification, while keeping the rest of the manufacturing process relatively simple and cost-effective.
3Reliability
If apertures are cut through printed regions, then the security against counterfeiting is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The apertures are punched or cut through the layers before the final assembly and lamination process. This preliminary action allows for easier creation of the apertures while the layers are still separate and more manageable, reducing the precision requirements compared to creating apertures through already-laminated multi-layered structures.
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 multi-layered structure significantly complicates counterfeiting by creating a unique aperture configuration and utilizing photoluminescent materials, making it more difficult for counterfeiters to reproduce the document's security features.
Implementation Method 1
at least one of the first, second, and third layers can comprise a printed region comprising, for instance, a photoluminescent material, for example, an ultraviolet fluorescent material
Data Source
AI summary
A secure multi-layered structure (14), for example, for a secure document, the secure multi-layered structure comprising a first layer (20) having a first aperture (25) opened in the first layer, a second layer (30) having a second aperture (35) opened in the second layer, and a third layer (40) having a third aperture (45) opened in the third layer, wherein each layer at least partially overlaps with the layer adjacent to it, at least a portion of the third layer being visible through the first aperture.