Anti-Fingerprint Coating Structure with Al2O3 and SiO2 Layers
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Solution Overview
Problem
Existing anti-fingerprint coatings on electronic device surfaces are prone to corrosion when exposed to salt water, leading to a shortened lifespan and visibility of fingerprints, as they fail to prevent adhesion and concealment of lipid components.
Innovation Solution
A coating structure comprising an aluminum oxide layer and a silicon dioxide layer, with a silane oligomer-based coating composition, is formed between the product surface and the anti-fingerprint coating layer, enhancing durability, anti-corrosion, and visibility of fingerprints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a silicon dioxide layer is used between the product surface and the AF coating layer, then wear resistance is improved, but the silicon dioxide layer is corroded with salt water over time, shortening the actual lifespan of the AF coating layer
Solution Approach 1:
The patent applies composite materials by combining aluminum oxide and silicon dioxide layers to create a multi-layer coating structure. The aluminum oxide layer provides corrosion resistance while the silicon dioxide layer provides wear resistance, allowing both properties to coexist without mutual interference. This composite structure resolves the contradiction by assigning different functional properties to different material layers.
Solution Approach 2:
The patent segments the protective coating into two distinct layers: an aluminum oxide layer for corrosion protection and a silicon dioxide layer for wear resistance. By dividing the single-layer solution into multiple specialized layers, each layer can optimize its specific function without compromising the other, thus resolving the contradiction between wear resistance and anti-corrosion durability.
2Ease of operation
If conventional AF coating is applied to ease cleaning and slip sensation, then cleaning ease is improved, but the coating fails to prevent adhesion of lipids or hide fingerprints
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by incorporating specific fluorine-containing compounds and silicones with controlled molecular structures. This parameter modification enables the coating to simultaneously achieve low surface energy (for ease of cleaning) and optical properties that reduce fingerprint visibility, resolving the contradiction between cleaning ease and fingerprint concealment.
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 proposed solution significantly improves the durability and reliability of the coating layer, prevents adhesion and visibility of fingerprints, and maintains product integrity even when exposed to salt water, ensuring a longer lifespan and improved user experience.
Implementation Method 1
a coating structure formed on the surface of a product includes: an aluminum oxide (Al2O3) layer formed on the surface of the product; a silicon dioxide (SiO2) layer formed on the surface of the aluminum oxide (Al2O3) layer
Data Source
AI summary
A coating structure and a method for forming the same where, by forming an aluminum oxide layer and a silicon dioxide layer between a product to be coated and a coating layer, durability, reliability and anti-corrosion of the coating layer can be improved and furthermore, product yield can also be improved. The coating structure formed on the surface of a product includes an aluminum oxide (Al2O3) layer formed on the surface of the product, a silicon dioxide (SiO2) layer formed on the surface of the aluminum oxide (Al2O3) layer, and a coating composition layer formed on the silicon dioxide (SiO2) layer.