Anti-counterfeiting via Sheet Resistance Mapping
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Solution Overview
Problem
Current anti-counterfeiting methods are visible to the naked eye or require complex detection techniques, lacking seamless and non-intrusive nanostructured solutions that can be mass-produced and frequently updated to evade counterfeiters.
Innovation Solution
Incorporating anti-counterfeiting patterns invisible to the unaided human eye, utilizing sheet resistance mapping metrology to detect unique patterns in nanostructured devices, which can be fabricated using techniques like e-beam direct writing, Deep UV lithography, and lift-off methods, allowing for integration into conductive materials and devices without affecting their functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If visible anti-counterfeiting features are used, then detection is easy, but they can be easily replicated by counterfeiters
Solution Approach 1:
The patent uses sheet resistance mapping to create invisible electrical patterns that appear as visual images only when detected by specialized equipment. The conductive material patterns are invisible to the naked eye but map to recognizable images through electrical resistance measurement, making them undetectable by casual inspection yet verifiable by authorities
Solution Approach 2:
The patent introduces sheet resistance mapping metrology as an intermediary detection method between the anti-counterfeiting feature and the detector. Instead of direct visual detection, the conductive patterns are detected through their electrical resistance properties, requiring specialized equipment that maps electrical resistance to visual representation
2Reliability
If complex detection techniques are used, then anti-counterfeiting security is improved, but detection complexity and cost increase
Solution Approach 1:
The sheet resistance mapping equipment serves multiple functions: it detects the invisible conductive patterns, maps the resistance values to visual images, and provides verification of authenticity. This multi-functional approach consolidates detection, visualization, and authentication into a single system
Solution Approach 2:
The patent creates an electrical copy or map of the physical conductive pattern through sheet resistance measurement. The resistance values are mapped to create a visual representation that replicates the pattern's image, allowing detection without directly observing the invisible conductive material
3Ease of manufacture
If traditional anti-counterfeiting methods are used, then implementation is simple, but they lack adaptability to evade counterfeiters
Solution Approach 1:
The patent enables dynamic updating of anti-counterfeiting patterns by modifying the conductive material deposition patterns. The lithography and etching processes can be reconfigured to create different images or patterns, allowing the system to adapt to new security requirements without changing the fundamental manufacturing approach
Solution Approach 2:
The patent changes the detection parameter from visual to electrical resistance measurement. By using conductive materials with specific resistance properties and creating patterns that manifest as images only through resistance mapping, the system achieves both manufacturing compatibility and enhanced security
4Reliability
If nanostructured patterns are made invisible, then security is improved, but detection precision requirements increase
Solution Approach 1:
The patent creates localized variations in electrical resistance corresponding to different parts of the pattern. Each region of the conductive material has specific resistance characteristics that map to particular image features, allowing precise localization and identification of pattern elements through resistance measurement
Data Source
AI summary
Aspects of the present disclosure include an anti-counterfeiting pattern that is identifiable by sheet resistance mapping metrology, a method of fabricating such an anti-counterfeiting device, and a method of detecting such an anti-counterfeiting device by imaging the pattern with sheet resistance mapping metrology. This abstract is provided to comply with rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.