Embedded Luminescent Particles in Electroplated Metal Layers
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Solution Overview
Problem
Metal parts, such as coins and aircraft components, are vulnerable to counterfeiting due to limited compositional variability and external security features that can be easily removed or defaced, necessitating a secure authentication method that integrates with existing manufacturing processes.
Innovation Solution
Incorporating luminescent particles into a metal matrix through electroplating, allowing for the creation of a durable, embedded optical security element that remains intact throughout the part's lifecycle, enhancing wear resistance and enabling authentication via energy conversion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external security elements (paints, coatings, etched barcodes) are applied to metal parts, then authentication capability is provided, but the security elements are easily removed or defaced
Solution Approach 1:
The patent combines the security element (luminescent particles) with the metal substrate by embedding them during the electroplating process. This merging creates an integrated security feature that becomes part of the metal layer itself, making it resistant to removal or defacement while maintaining authentication capability.
Solution Approach 2:
The patent creates a composite metal layer consisting of metal matrix and embedded luminescent particles. This composite structure provides both the mechanical properties of metal and the optical authentication properties of luminescent materials, achieving durability and authentication capability simultaneously.
2Strength
If luminescent particles are incorporated into metal parts through electroplating, then durability and wear resistance are improved, but the optical density of metal plating may interfere with optical detection
Solution Approach 1:
The patent uses luminescent particles that convert UV light to visible light, creating a localized optical response at the particle sites. This local quality transformation allows the metal layer to remain optically dense for structural integrity while providing specific detectable luminescent signals for authentication.
Solution Approach 2:
The luminescent particles exhibit color changes by converting UV excitation to visible emission. This property allows the security element to be invisible under normal lighting but detectable under UV illumination, resolving the conflict between optical density and detectability.
3Reliability
If luminescent particles are added to the plating solution, then embedded security elements are achieved, but particle distribution uniformity and adhesion to substrate become challenging
Solution Approach 1:
The patent uses the electroplating process itself as an intermediary mechanism to deposit luminescent particles onto the metal substrate. The electrochemical deposition provides controlled particle distribution and strong adhesion, solving the challenges of uniformity and bonding that would be difficult to achieve with simple mixing or coating methods.
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 method provides a robust, built-in authentication feature that resists wear and tampering, ensuring the longevity of the security element and facilitating the detection of authenticity, thereby reducing counterfeiting and liability for manufacturers.
Implementation Method 1
performing a plating process to coat the metal substrate with the metal layer, wherein the metal layer contains embedded luminescent particles, wherein the plating process is an electroplating process
Implementation Method 2
embedding luminescent elements in a metal object
Data Source
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AI summary
Formation of an authentication element by deposition of a metal layer with embedded particles on a metal substrate, wherein the embedded particles are configured to convert energy from one wavelength to another. The embedded particles may be upconverters, downconverters, or phosphorescent phosphors, which can be detected and measured with analytical equipment when deposited in the metal layer. A metal substrate may include coinage.