Metallized Structured Surface Security Element
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Solution Overview
Problem
Current security elements are inadequate in preventing counterfeiting, as they can be reproduced with modern copiers, necessitating a more effective solution for verifying authenticity.
Innovation Solution
A security element comprising a substrate with structured major surfaces coated with metal layers of varying transparency, which produces a unique reflective diffraction pattern for authentication, utilizing a substrate with micro or nanoscale features and metal layers that can be continuous or patterned, formed from various materials including metals and metal oxides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional security elements are used, then they can be reproduced with modern copiers, but they fail to provide adequate protection against counterfeiting
Solution Approach 1:
The patent applies optical effects that cause the security element to display different colors or optical appearances under different lighting conditions or viewing angles. The metal layers with varying transparency create iridescent effects and color shifts that are difficult to replicate, providing reliable anti-counterfeiting protection through optical property changes rather than complex structural designs
Solution Approach 2:
The security element uses composite structures combining substrate materials with multiple metal layers of different transparency values. This composite material approach creates unique optical signatures and diffraction patterns that are inherently difficult to reproduce with standard copying methods, enhancing reliability without requiring overly complex device structures
2Reliability
If metal layers with varying transparency are used, then a unique reflective diffraction pattern is produced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent controls the transparency parameter of metal layers within specific ranges (first metal layer: 10-90% transparency, second metal layer: 5-80% transparency) rather than requiring exact precision. By defining acceptable parameter ranges and using the interaction of multiple layers, the system achieves reliable authenticity verification while reducing the stringency of manufacturing precision requirements
Solution Approach 2:
Instead of requiring perfect transparency control at every point, the patent uses the cumulative optical effect of multiple metal layers with varying transparency. The partial transparency variations across different regions create the overall diffraction pattern, allowing manufacturing tolerances while maintaining reliable authentication capability
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 security element effectively verifies authenticity by producing a distinct reflective diffraction pattern, enhancing protection against counterfeiting by providing a unique optical signature that is difficult to replicate.
Implementation Method 1
obtaining a reflective diffraction pattern from the security element
Implementation Method 2
producing a unique reflective diffraction pattern
Data Source
AI summary
A security element, including: a substrate having a first structured major surface and a second structured major surface; and a first metal layer coated on the first structured major surface, wherein the transparency of the first metal layer is between 10% and 90%; and a second metal layer coated on the second structured major surface.