Quantum Dot Structural Coloration for Complex Anti-Counterfeit Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing structural coloration technologies lack complexity and variety in patterns, leading to insufficient security and increased vulnerability to counterfeiting, with manufacturing processes that are not easily discernible, making imitation difficult to prevent.
Innovation Solution
A structural coloration substrate is developed using quantum dots and light conversion structures with complex patterns, including protruded or concaved shapes and varying cross-sectional triangles, combined with atomic layer deposition for precise layering, to create encrypted security patterns that are difficult to replicate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simple structural coloration layers are stacked, then manufacturing is simple, but security and pattern complexity are insufficient
Solution Approach 1:
The substrate is divided into multiple functional layers including base substrate, quantum dot layer, first structural coloration layer, and second structural coloration layer. Each layer serves a specific function and contributes to the overall complex pattern, resolving the contradiction by making complexity manageable through segmentation
Solution Approach 2:
Multiple structural coloration layers are stacked and nested upon each other, with each layer containing specific patterns that combine to create increasingly complex overall patterns. The quantum dot layer is embedded within the substrate structure, creating nested complexity that enhances security
2Reliability
If complex patterns are created using multiple layers and quantum dots, then security is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent controls specific parameters such as quantum dot size (affecting emission wavelength), layer thickness, and material composition to achieve desired optical properties. By controlling these parameters, the manufacturing process can produce complex patterns with acceptable precision requirements
Solution Approach 2:
The manufacturing process creates replicated patterns across the substrate by forming quantum dot arrays and structural coloration layers that can be copied consistently. This allows complex security patterns to be manufactured with standardized precision rather than requiring unique high-precision fabrication for each substrate
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 substrate achieves enhanced security by displaying diverse and complex colors and patterns, making imitation impossible without replicating the exact manufacturing process, thereby increasing security and durability.
Implementation Method 1
forming a first pattern displaying a first color on a base substrate, using a quantum dot
Implementation Method 2
The base substrate may absorb a light and externally display a second color different from the first color
Implementation Method 3
the light reflected from a surface of the film, and the light reflected from the film after passing through the film, are constructively interfered
Implementation Method 4
the change or the variation of the color of the light externally displayed according to an incident angle of the light is defined as structural coloration
Implementation Method 5
stacking at least one structural coloration layer on the base substrate
Data Source
AI summary
In a structural coloration substrate, a method for manufacturing the structural coloration substrate, and a security verification system using the structural coloration substrate manufactured by the method, the method includes forming a first pattern displaying a first color on a base substrate, using a quantum dot, and stacking at least one structural coloration layer on the base substrate on which the first pattern is formed. The first color of the first pattern is changed and displayed, as the at least one structural coloration layer is stacked.