Cover Window Sub-Opaque Layer Magnetic Additives Adhesion
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Solution Overview
Problem
Existing cover windows for display devices face challenges in achieving uniform adhesion to adhesive layers, which can affect the reliability and performance of the display devices.
Innovation Solution
A cover window design that includes a base layer and a sub-opaque layer with magnetic additives, such as Fe, Al, FeO, and Fe2O3, in a core-shell structure, applied in a specific range of 5 wt % to 15 wt % to enhance surface roughness and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cover window without magnetic additives is used, then the structure is simple and manufacturing is easy, but the adhesion to the adhesive layer is insufficient and non-uniform
Solution Approach 1:
The patent applies composite materials by incorporating magnetic additives (Fe, Al, FeO, Fe2O3) into the sub-opaque layer of the cover window. This creates a composite structure that enhances adhesion to the adhesive layer through magnetic interactions, while maintaining the overall structural integrity and optical properties of the cover window.
Solution Approach 2:
The patent changes the physical and chemical parameters of the sub-opaque layer by adding magnetic particles with specific properties (particle size, concentration, magnetic susceptibility). These parameter changes enable the layer to interact magnetically with the adhesive layer, significantly improving adhesion strength without fundamentally altering the cover window's basic structure.
2Reliability
If the sub-opaque layer has smooth surface, then the manufacturing process is simple, but the adhesion to adhesive layer is weak
Solution Approach 1:
The patent controls the surface roughness parameter of the sub-opaque layer within a specific range (0.4-0.7 micrometers) by adjusting manufacturing parameters such as coating thickness, curing conditions, and additive concentration. This optimized roughness range creates optimal mechanical interlocking and magnetic interaction with the adhesive layer, maximizing adhesion strength.
3Reliability
If magnetic additives are added to enhance adhesion, then the bonding strength improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent optimizes the concentration of magnetic additives within a specific range (5-15 wt%) to achieve effective adhesion enhancement while avoiding excessive complexity in the manufacturing process. This parameter optimization ensures uniform distribution of additives during coating and curing, making the process manageable with standard manufacturing equipment and procedures.
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 improved adhesion between the cover window and the adhesive layer results in a display device with enhanced reliability and performance, as the uniform surface roughness and magnetic properties of the additives strengthen the bonding.
Implementation Method 1
applying a magnetic force on the material layer, and curing the material layer to provide a first sub-opaque layer. The additive may move adjacent to the surface of the material layer.
Data Source
AI summary
A cover window according to an embodiment includes a base layer, and a first sub-opaque layer disposed on the base layer, and the first sub-opaque layer includes additives having magnetic properties.