Silicon Fluorine Layer for Electrowetting Thickness Reduction
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Solution Overview
Problem
Existing electrowetting display devices have a thickness constraint due to the need for multiple layers, which complicates manufacturing and increases power requirements, while current materials like fluoropolymers have limitations in controlling wettability and providing adequate barrier properties.
Innovation Solution
A support plate with a layer comprising silicon and fluorine, such as SiOCF, is used to reduce thickness by providing both dielectric and barrier properties, allowing for a single layer that simplifies manufacturing and reduces power consumption by controlling wettability and refractive index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers (electrode, barrier layer, hydrophobic layer) are used to provide required properties, then each layer can provide its required properties for operation, but the support plate thickness increases and manufacturing complexity increases
Solution Approach 1:
The patent combines the barrier layer and hydrophobic layer into a single integrated layer made of fluorinated glass frit material. This merged layer simultaneously provides both the barrier function (preventing current leakage through the support plate) and the hydrophobic function (controlling fluid wettability), thereby reducing the total number of layers and decreasing support plate thickness while maintaining all required functional properties.
Solution Approach 2:
The patent employs a composite material system consisting of glass frit base material combined with fluorinated compounds. This composite provides both the dielectric/barrier properties from the glass frit matrix and the hydrophobic surface properties from the fluorinated components, enabling a single layer to fulfill multiple functional requirements that previously required separate layers.
2Reliability
If multiple layers are used to ensure proper operation, then functional requirements are met, but manufacturing complexity and power requirements increase
Solution Approach 1:
The patent merges the barrier layer and hydrophobic layer into a single integrated layer, reducing the number of deposition steps and material applications required during manufacturing. This simplification directly reduces manufacturing complexity while maintaining all necessary functional properties for pixel operation, including current barrier performance and fluid wettability control.
Solution Approach 2:
The single integrated layer is designed to perform multiple functions simultaneously: it acts as a barrier layer to prevent current leakage, provides hydrophobic surface properties for fluid control, and contributes to the overall structural integrity of the support plate. This multi-functionality reduces the total number of components and simplifies the manufacturing process.
3Reliability
If traditional materials are used for barrier and hydrophobic layers, then adequate barrier properties are provided, but thickness cannot be reduced
Solution Approach 1:
The patent uses a composite material consisting of glass frit with fluorinated compounds incorporated into the matrix. This composite enables a single layer to provide both the barrier function (current leakage prevention) and hydrophobic function (fluid wettability control) simultaneously, eliminating the need for multiple separate layers and thereby reducing overall thickness while maintaining adequate barrier properties.
Solution Approach 2:
The barrier and hydrophobic functions are merged into a single integrated layer made from fluorinated glass frit. This merged structure provides adequate barrier properties to prevent current leakage while simultaneously providing hydrophobic surface properties, all within a reduced thickness compared to traditional multi-layer constructions.
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 a thinner support plate with improved optical properties and reduced power requirements, enhancing the efficiency and quality of electrowetting display elements.
Implementation Method 1
an electrode, which is separated from fluids of the electrowetting display device by an electrically insulating cover layer
Implementation Method 2
The hydrophobic material provides the hydrophobic display area
Implementation Method 3
Electrowetting element with a layer including silicon and fluorine
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
An electrowetting element (1) includes a first fluid (11) and a second fluid (12) immiscible with the first fluid, and a configuration of the first and second fluids is controllable with an applied voltage. There is at least one electrode (17) for providing the applied voltage. A support plate (5) has a surface for adjoinment by the first fluid, with the support plate including a first layer (16) formed at least partly of a material including silicon and fluorine.