Banknote Security Element with Multi-Coercivity Magnetic Areas
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Solution Overview
Problem
Current security threads for banknotes and cards can be counterfeited using transfer techniques, as magnetic elements can be detected by normal instruments, and existing coded magnetic threads are vulnerable to replication, compromising their security.
Innovation Solution
A security element with a substrate having magnetic areas of different coercivity values and identical or different residual magnetism, generating multiple codes detectable only by dedicated sensors, enhancing security and counterfeiting difficulty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic elements are deposited on security threads using conventional techniques, then the security element can be detected by magnetic sensors, but the magnetic characteristics can be easily identified and replicated by counterfeiters
Solution Approach 1:
The patent applies parameter changes by using magnetic inks with different coercivity values (e.g., 200 oe and 4000 oe) to create magnetic areas that respond differently to magnetization. This creates multiple detectable codes (first code from all magnetic areas, second code from high coercivity areas, third code from low coercivity areas) that are difficult to replicate without knowing the specific coercivity parameters and their distribution pattern.
2Reliability
If magnetic areas with different coercivity values are used to generate multiple codes, then counterfeiting becomes more difficult, but the device complexity and manufacturing process become more complex
Solution Approach 1:
The patent segments the magnetic areas into different types based on coercivity values. Each magnetic area can have a different coercivity value (e.g., 200 oe or 4000 oe), creating distinct segments that respond differently to magnetization. This segmentation allows generation of multiple codes (first, second, and third codes) from a single security element, increasing security while maintaining a relatively simple overall structure.
3Adaptability or versatility
If multiple types of magnetic areas with different coercivity values are deposited, then at least three mutually different codes can be generated, but the manufacturing precision and control requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-defining specific coercivity values for different magnetic areas during the deposition process. The magnetic inks are prepared with known coercivity characteristics (e.g., 200 oe and 4000 oe), and their placement is predetermined to create the security codes. This preliminary preparation of magnetic materials with specific properties simplifies the manufacturing control, as the coercivity parameters are established before the security element is assembled and used.
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 solution provides a highly secure, reliable, and cost-effective security element that generates distinct codes detectable at high speeds, making counterfeiting significantly more difficult and ensuring only authorized personnel can detect its content.
Implementation Method 1
magnetic areas which comprise at least two types of magnetic areas having different coercivity values
Implementation Method 2
whose residual magnetism is identical or different
Data Source
AI summary
A security element, particularly for banknotes, security cards and the like, comprising a first substrate which is at least partially opaque when viewed in transmitted light, magnetic areas being deposited on the substrate, the magnetic areas comprising at least two types of magnetic areas which have different coercivity values and whose residual magnetism is identical or different, said different values being adapted to generate at least three mutually different codes.