Electrolytic Structural Color Filter Fabrication
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Solution Overview
Problem
Conventional structural color filter devices require complex and costly fabrication techniques, such as e-beam lithography and vacuum-based systems, limiting their large-scale feasibility and affordability due to the need for high-quality thin films and smooth substrates.
Innovation Solution
A method for forming structural color filters via electrolytic deposition of metal and dielectric layers at ambient conditions, using electrochemical reactions driven by electric potential, allowing for uniform deposition on surfaces of any size, shape, and roughness without expensive vacuum systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional fabrication techniques (e-beam lithography, vacuum-based systems) are used to form structural color filters, then high-quality thin films and smooth substrates can be obtained, but the fabrication process becomes complex and costly, limiting large-scale feasibility
Solution Approach 1:
The patent replaces complex mechanical vacuum-based deposition systems with electrochemical deposition using liquid electrolytes. The metal and dielectric layers are deposited through electrochemical reactions driven by electric potential, eliminating the need for expensive vacuum equipment while achieving uniform, high-quality thin films at ambient conditions
Solution Approach 2:
The patent changes the deposition parameters from high-vacuum, high-temperature conditions to ambient temperature and pressure electrochemical conditions. By controlling electric potential and electrolyte composition, the method achieves precise control over layer thickness and quality without requiring complex vacuum systems
2Manufacturing precision
If conventional fabrication techniques are used to form structural color filters, then high-quality thin films can be obtained, but expensive vacuum systems and high temperatures are required, increasing production costs
Solution Approach 1:
The patent replaces expensive vacuum-based deposition systems with simple electrochemical cells using liquid electrolytes. The deposition process occurs at ambient temperature and pressure, eliminating the need for costly vacuum equipment and high-temperature furnaces while producing high-quality metal and dielectric layers
Solution Approach 2:
The patent uses disposable or easily replaceable electrolyte solutions instead of expensive vacuum systems. The liquid electrolytes can be prepared in standard laboratory conditions and deposited in simple electrochemical cells, dramatically reducing equipment costs while maintaining film quality
3Reliability
If self-assembled nanoparticles are used to generate structural colors, then distinct structural colors can be obtained, but substrates of high flatness and smoothness are required, limiting application versatility
Solution Approach 1:
The patent replaces self-assembly processes that require ultra-smooth substrates with electrochemical deposition that can accommodate various substrate surfaces. The electrochemical method deposits conformal layers that adhere well to different substrate types and surface conditions, expanding application versatility
Solution Approach 2:
The patent creates a universal deposition method that works on various substrate materials and surface conditions. The electrochemical process can deposit metal and dielectric layers on flexible, rigid, transparent, or opaque substrates without requiring high flatness or smoothness, making the technology broadly applicable
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
Enables the production of structural color filters with minimal angle dependence and high brightness, suitable for various applications, while reducing production costs and simplifying the fabrication process.
Implementation Method 1
depositing a first metal layer on a surface of a substrate by applying an electric potential to the substrate; the surface of the substrate is in contact with a first electrolyte; an electrochemical reaction of a first precursor at the surface of the substrate is driven by the electric potential
Implementation Method 2
depositing a first dielectric layer on the first metal layer by contacting the first metal layer with a second electrolyte; the second electrolyte includes a second precursor of a first dielectric material
Data Source
Figure 1~3
Figure 4~5B
Figure 6A~7A
AI summary
A method of forming a structural color filter includes: depositing a first metal layer (92) on a surface of a substrate (124) by applying an electric potential to the substrate; depositing a first dielectric layer (100) on the first metal layer by contacting the first metal layer with a second electrolyte; and depositing a second metal layer (94) on the first dielectric layer. The surface of the substrate is in contact with a first electrolyte; the first electrolyte comprises a first precursor, an electrochemical reaction of the first precursor at the surface of the substrate is driven by the electric potential; the depositing the first metal layer on the surface of the substrate is performed at a temperature of less than or equal to 50°C. The second electrolyte comprises a second precursor of a first dielectric material of the first dielectric layer.