Optically-Detectable Pattern in Electrical Element Thin-Film Layers
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Solution Overview
Problem
There is a need for embedding information directly into electronic devices without additional process steps, particularly to prevent counterfeiting and ensure authenticity, while leveraging the properties of transparent thin-films in modern electronics, as existing methods are easily circumvented by counterfeiters.
Innovation Solution
A method for fabricating electrical elements with optically-detectable patterns by integrating information-encoding patterns into the thin-film layers during the manufacturing process, allowing the embedded information to be encoded in a way that it is both optically detectable and contributes to the electrical function, without requiring additional processing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate printing steps are used to add decorative images or identifiers to electronic devices, then the devices can be labeled with indicia, but counterfeiters can easily copy these indicia and print them directly onto counterfeit devices, making the authentication vulnerable
Solution Approach 1:
The patent combines the authentication indicia with the functional circuit patterns themselves, so that the same thin-film layers that provide electrical functionality also encode authentication information. This merging makes it impossible for counterfeiters to separate the functional design from the authentication code, as both are embedded in the same manufacturing process and material structure.
Solution Approach 2:
The thin-film layers serve multiple functions simultaneously: they provide electrical conductivity, structural integrity, and authentication encoding. The patent designs the circuit patterns and interconnects to also function as the authentication indicia, creating a multi-functional structure that eliminates the need for separate authentication layers while enhancing security.
2Reliability
If additional process steps are added to embed authentication information in electronic devices, then authentication capability is improved, but manufacturing complexity and costs increase
Solution Approach 1:
The authentication information is embedded within the existing functional circuit layers rather than adding separate authentication layers. The same thin-film deposition and patterning processes used to create conductive traces and interconnects are also used to create the authentication indicia, eliminating additional process steps while maintaining authentication capability.
Solution Approach 2:
The authentication indicia are designed and patterned into the thin-film layers during the initial manufacturing process, before the device is assembled or tested. By embedding the authentication code in the base functional layers early in the manufacturing sequence, the patent avoids the need for subsequent authentication layer additions or separate encoding steps.
3Loss of information
If authentication indicia are printed separately onto electronic devices, then labeling is achieved, but the indicia can be easily copied and reproduced by counterfeiters, reducing the difficulty of detecting and measuring authenticity
Solution Approach 1:
The patent uses composite thin-film structures where multiple materials with different optical properties are layered and patterned to create authentication indicia. These composite structures produce specific optical effects such as interference colors or diffraction patterns that are difficult to replicate with simple printing, as they require precise control of multiple material layers and their interfaces.
Solution Approach 2:
The authentication indicia utilize optical interference effects that produce color changes or iridescent effects based on the thickness and refractive index of the thin-film layers. These color effects are inherently tied to the physical structure of the layers and cannot be replicated by conventional printing, providing a visually detectable authentication feature that is difficult to counterfeit.
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
This approach enables the simultaneous fabrication of electrical elements with embedded information that is difficult to reproduce, providing an effective authentication feature and allowing customers to verify the authenticity of genuine products, while also simplifying the manufacturing process and reducing costs.
Implementation Method 1
the optical layer structure when illuminated by incident light produces an optically-detectable interference image
Data Source
AI summary
An electrical element is fabricated including an optically-detectable pattern of embedded information. An initial physical design is received for an electrical element that performs an electrical function, together with a pattern of information to be embedded in the electrical element. An encoding region is designated within the initial physical design of the electrical element. Information-encoding patterns are determined for one or more thin-film layers in the encoding region to form an optical layer structure that encodes the pattern of information. The initial physical design and the information-encoding patterns are combined into a modified physical design which is used to fabricate the electrical element. The fabricated electrical element performs the electrical function and forms an optically-detectable interference image including the embedded pattern of information when illuminated by incident light.