Composite Particle Authentication via Magnetic Heating
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Solution Overview
Problem
Counterfeiting of goods, especially valuable products like medicines and drugs, remains a significant global issue due to the inability of existing security solutions to provide robust, tamper-proof identification and tracking mechanisms that are difficult for counterfeiters to replicate.
Innovation Solution
A composite particle comprising a superparamagnetic core and a thermoluminescent shell made of doped ceramic material, which emits radiation when heated by an oscillating magnetic field, allowing for unique identification and authentication through a distinct 'glow curve' that is challenging to duplicate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security solutions like RFID or simple codes are used, then implementation is easy and cost-effective, but they can be easily replicated by counterfeiters
Solution Approach 1:
The patent uses composite particles combining superparamagnetic material and thermoluminescent material to create a multi-functional security marking. The superparamagnetic core provides magnetic response for heating, while the thermoluminescent shell emits light upon heating, creating a complex authentication signal that is difficult to replicate but can be read with relatively simple equipment.
Solution Approach 2:
The patent utilizes changes in physical parameters (magnetic susceptibility, thermoluminescence intensity, glow curve characteristics) to encode authentication information. The superparamagnetic material exhibits temperature-dependent magnetic properties, and the thermoluminescent material shows characteristic glow curves that serve as unique identifiers, making replication difficult without precise parameter matching.
2Reliability
If complex multi-functional particles are used, then authentication security is improved, but manufacturing precision requirements increase
Solution Approach 1:
The security marking is divided into multiple particles, each containing superparamagnetic and thermoluminescent components. This segmentation allows independent optimization of each particle's properties while maintaining overall system security through the collective behavior of many particles, reducing the precision burden on individual particle manufacturing.
Solution Approach 2:
The patent employs core-shell structure where the superparamagnetic material forms the core and thermoluminescent material forms the shell. This local differentiation of material properties within each particle enables independent control of magnetic and optical characteristics, allowing manufacturing processes to optimize each layer separately rather than requiring perfect homogeneity throughout the entire particle.
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 composite particle provides a robust and tamper-proof identification method that is difficult to replicate, ensuring the authenticity of products and preventing counterfeiting by utilizing the unique properties of superparamagnetism and thermoluminescence for secure tracking and verification.
Implementation Method 1
at least one superparamagnetic portion or core
Implementation Method 2
heating said at least one thermoluminescent material by heating said at least one superparamagnetic material in an oscillating magnetic field
Implementation Method 3
at least one thermoluminescent material which comprises a doped ceramic material... emitting radiation from said at least one thermoluminescent material
Data Source
AI summary
Disclosed is a composite particle for use in a marking that is suitable for identification/authentication purposes. The particle comprises at least one superparamagnetic portion and at least one thermoluminescent portion and optionally also a thermoconductive portion between the superparamagnetic and thermoluminscent portions.