Flexible Window Coating for Optical Clarity and Impact Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Polymer films used as window materials for electronic devices compromise optical properties and impact resistance, which are crucial for flexible and durable displays.
Innovation Solution
Incorporating an inorganic layer composed of silicon oxide and aluminum oxide, with a content of about 1 to 10 wt% and a thickness of 40 to 90 nm, enhances the optical properties and impact resistance of the window, which includes a base layer made of polyimide, polyethylene terephthalate, polyamide, or polycarbonate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a polymer film is used as a window material to achieve flexible properties, then flexibility is improved, but optical properties and impact resistance are deteriorated
Solution Approach 1:
The patent applies composite materials by combining a polymer base layer with an inorganic layer containing silicon oxide and aluminum oxide. This composite structure allows the window to maintain the flexibility of the polymer film while the inorganic layer provides enhanced optical properties and impact resistance, thereby resolving the contradiction between flexibility and reliability.
Solution Approach 2:
The inorganic layer is applied locally on the polymer base layer to provide specific functional properties where needed. The inorganic layer contains silicon oxide and aluminum oxide in controlled proportions (1-10 wt% Al2O3 relative to SiO2), creating a localized enhancement of optical properties and impact resistance without compromising the overall flexibility of the polymer substrate.
2Strength
If the inorganic layer thickness is increased to improve impact resistance, then durability is improved, but flexibility is deteriorated
Solution Approach 1:
The patent optimizes the thickness of the inorganic layer to a specific range (40-90 nm) to achieve the desired balance between impact resistance and flexibility. By controlling the thickness parameter within this range, the inorganic layer provides sufficient protection against impacts while maintaining the flexibility required for foldable electronic devices. This parameter optimization resolves the contradiction between strength and adaptability.
Data Source
AI summary
A window includes a base layer and an inorganic layer which is on the base layer. The inorganic layer includes silicon oxide and aluminum oxide which is in a content of about 1 wt % or more and less than about 10 wt % with respect to about 100 wt % of the silicon oxide.